Patent Publication Number: US-2022234873-A1

Title: Lift device with deployable operator station

Description:
CROSS-REFERENCE TO RELATED PATENT APPLICATION 
     This application is a continuation of U.S. application Ser. No. 17/193,722, filed Mar. 5, 2021, which claims the benefit of and priority to U.S. Provisional Application No. 62/985,955, filed Mar. 6, 2020, U.S. Provisional Application No. 62/986,465, filed Mar. 6, 2020, U.S. Provisional Application No. 62/985,956, filed Mar. 6, 2020, and U.S. Provisional Application No. 62/986,357, filed Mar. 6, 2020, the entire disclosures of which are incorporated by reference herein. 
    
    
     BACKGROUND 
     The present application generally relates to lift devices. More particularly, the present application relates to mobile elevated work platforms. 
     SUMMARY 
     One implementation of the present disclosure is a lift device, according to an exemplary embodiment. The lift device includes a lift apparatus and a base assembly. The lift apparatus is configured to raise and lower an implement assembly. The base assembly is configured to support the lift apparatus. The base assembly includes a deployable operator station transitionable between a deployed position and a stowed position. In the deployed position, the deployable operator station is configured to provide a seating and control arrangement for an operator. In the stowed position, the deployable operator station is substantially sealed from an external environment to limit access to the deployable operator station. 
     Another implementation of the present disclosure is a deployable operator station for a lift device, according to an exemplary embodiment. The deployable operator station includes a rollover protective structure, and an overhead protective structure. The rollover protective structure is rotatably coupled at a first end with a support structure. The overhead protective structure is pivotally coupled with a second end of the rollover protective structure. The overhead protective structure is pivotally coupled with the rollover protective structure through a selective engagement mechanism. The selective engagement mechanism is configured to selectively limit rotation between the overhead protective structure and the rollover protective structure and receive a user input to disengage the selective engagement mechanism for rotating the overhead protective structure relative to the rollover protective structure. The deployable operation station is transitionable between a deployed position and a stowed position. 
     Another implementation of the present disclosure is a lift device, according to an exemplary embodiment. The lift device includes a chassis, multiple tractive elements, an electric motor, and a deployable operator station. The multiple tractive elements are rotatably coupled to the chassis and are configured to support the chassis. The electric motor is configured to drive the multiple tractive elements for driving and steering operations. The deployable operator station is configured to transition between a deployed position and a tucked position. The deployable operator station includes a rollover protective structure and an overhead protective structure. The rollover protective structure is pivotally coupled with a support member at a first end and configured to be pivoted relative to the support member for deployment by a linear electric actuator. The overhead protective structure is pivotally coupled with a second end of the rollover protective structure. The overhead protective structure is pivotally coupled with the rollover protective structure through a selective engagement mechanism. The selective engagement mechanism is configured to receive a user input to selectively limit rotation between the overhead protective structure and the overhead protective structure. 
     The invention is capable of other embodiments and of being carried out in various ways. Alternative exemplary embodiments relate to other features and combinations of features as may be recited herein. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The disclosure will become more fully understood from the following detailed description, taken in conjunction with the accompanying figures, wherein like reference numerals refer to like elements, in which: 
         FIG. 1  is a perspective view of a lift device, according to an exemplary embodiment; 
         FIG. 2  is a perspective view of the lift device of  FIG. 1  including a deployable operator station in a deployed position, according to an exemplary embodiment; 
         FIG. 3  is a perspective view of the lift device of  FIG. 1  showing the deployable operator station in a tucked or stowed position, according to an exemplary embodiment; 
         FIG. 4  is a block diagram of a control system for a turntable assembly of the lift device of  FIG. 1 , according to an exemplary embodiment; 
         FIG. 5  is a perspective view of the lift device of  FIG. 1  showing portions of a base assembly and a turntable assembly of the lift device in greater detail and a split battery architecture, according to an exemplary embodiment; 
         FIG. 6  is a perspective view of a base assembly of the lift device of  FIG. 1  showing a split battery architecture, according to an exemplary embodiment; 
         FIG. 7  is a perspective view of an electrical slip ring of the turntable assembly of the lift device of  FIG. 1 , according to an exemplary embodiment; 
         FIG. 8  is a perspective view of a battery storage portion of the base assembly of the lift device of  FIG. 1 , according to an exemplary embodiment; 
         FIG. 9  is a perspective view of a battery storage portion of the base assembly of the lift device of  FIG. 1 , according to an exemplary embodiment; 
         FIG. 10  is a block diagram of a control system for the lift device of  FIG. 1 , according to an exemplary embodiment; 
         FIG. 11  is a perspective view of the lift device of  FIG. 1  showing the deployable operator station in a tucked or stowed position, according to an exemplary embodiment; 
         FIG. 12  is perspective view of the deployable operator station of the lift device of  FIG. 1  including a first frame assembly and a second frame assembly, according to an exemplary embodiment; 
         FIG. 13  is a top view of the deployable operator station of the lift device of  FIG. 1 , according to an exemplary embodiment; 
         FIG. 14  is a side view of the deployable operator station of the lift device of  FIG. 1  in a stowed or tucked position, according to an exemplary embodiment; 
         FIG. 15  is a perspective view of a portion of the deployable operator station of the lift device of  FIG. 1  in a partially deployed position, according to an exemplary embodiment; 
         FIG. 16  is a perspective view of a portion of the deployable operator station of the lift device of  FIG. 1  in a deployed position, according to an exemplary embodiment; 
         FIG. 17  is a perspective view of a portion of the deployable operator station of the lift device of  FIG. 1  including an engagement mechanism, according to an exemplary embodiment; 
         FIG. 18  is a perspective view of a portion of the engagement mechanism of  FIG. 10 , according to an exemplary embodiment; 
         FIG. 19  is a perspective view of an armrest of the deployable operator station of the lift device of  FIG. 1 , according to an exemplary embodiment; 
         FIG. 20  is a front view of the deployable operator station of the lift device of  FIG. 1 , according to an exemplary embodiment; 
         FIG. 21  is a perspective view of an armrest of the deployable operator station of the lift device of  FIG. 1 , according to an exemplary embodiment; 
         FIG. 22  is a perspective view of a portion of the deployable operator station of the lift device of  FIG. 1  including a linear electric actuator that pivots a hood member, according to an exemplary embodiment; 
         FIG. 23  is a perspective view of a portion of the deployable operator station of the lift device of  FIG. 1 , including the hood member, according to an exemplary embodiment; 
         FIG. 24  is a perspective view of various display screens that may be positioned at the deployable operator station of the lift device of  FIG. 1 , according to an exemplary embodiment; 
         FIG. 25  is a block diagram of a control system for the lift device of  FIG. 1 , according to an exemplary embodiment; 
         FIG. 26  is a perspective view of the lift device of  FIG. 1  configured for use with a working platform, according to an exemplary embodiment; 
         FIG. 27  is a perspective view of the lift device of  FIG. 1  configured for use with a fork assembly, according to an exemplary embodiment; 
         FIG. 28  is a block diagram of a control system of the lift device of  FIG. 1 , according to an exemplary embodiment; 
         FIG. 29  is a top view of a portion of a steering system of the lift device of  FIG. 1 , according to an exemplary embodiment; 
         FIG. 30  is a front view of a portion of the steering system of the lift device of  FIG. 1 , according to an exemplary embodiment; 
         FIG. 31  is a perspective view of a portion of the steering system of the lift device of  FIG. 1 , according to an exemplary embodiment; 
         FIG. 32  is a perspective view of a portion of the steering system of the lift device of  FIG. 1 , according to an exemplary embodiment; 
         FIG. 33  is a perspective view of a portion of the steering system of the lift device of  FIG. 1 , according to an exemplary embodiment; 
         FIG. 34  is a perspective view of a lift device including a deployable operator station in a stowed position, according to another exemplary embodiment; 
         FIG. 35  is another perspective view of the lift device of  FIG. 34  including the deployable operator station in a deployed position, according to an exemplary embodiment; 
         FIG. 36  is a rear perspective view of the lift device of  FIG. 34  including the deployable operator station in a deployed position, according to an exemplary embodiment; 
         FIG. 37  is another perspective view of the lift device of  FIG. 34  including a deployable storage compartment in a deployed position, according to an exemplary embodiment; 
         FIG. 38  is a top perspective view of the lift device of  FIG. 34 , depicting an interior of the deployable operator station, according to an exemplary embodiment; 
         FIG. 39  is a front perspective view of the lift device of  FIG. 34 , depicting an operator present within the deployable operator station, according to an exemplary embodiment; 
         FIG. 40  is another front perspective view of the lift device of  FIG. 34 , according to an exemplary embodiment; 
         FIG. 41  is a perspective view within the deployable operator station shown in  FIG. 38 , detailing a control mechanism that can be used to operate the lift device, according to an exemplary embodiment; 
         FIG. 42  is a side view of the lift device of  FIG. 34 , depicting an interior of the deployable operator station, according to an exemplary embodiment; 
         FIG. 43  is a top, rear perspective view of the lift device of  FIG. 34 , detailing the deployable operator station shown in  FIG. 38 ; 
         FIG. 44  is a top, rear perspective view of the lift device of  FIG. 34 , with an operator seated within the deployable operator station shown in  FIG. 43 , according to an exemplary embodiment; 
         FIG. 45  is a side view of the lift device of  FIG. 44 , according to an exemplary embodiment; 
         FIG. 46  is pictorial view of a drone monitoring a jobsite, according to an exemplary embodiment; 
         FIG. 47  is a pictorial view of a remote controller used to operate a lift device, such as the lift device of  FIG. 1 or 34 , according to an exemplary embodiment; 
         FIG. 48  is a pictorial view of an operator remotely operating a selectively autonomous or semi-autonomous lift device, such as the lift device of  FIG. 1 or 34 , according to an exemplary embodiment; 
         FIG. 49  is another pictorial view of an operator remotely operating a selectively autonomous or semi-autonomous lift device, such as the lift device of  FIG. 1 or 34 , according to an exemplary embodiment; 
         FIG. 50  is a pictorial view of lift devices traveling to a solar recharging station, according to an exemplary embodiment; 
         FIG. 51  is a pictorial view of an operator providing a target projection for a lift device to deliver materials to, according to an exemplary embodiment; 
         FIG. 52  is a pictorial view of a lift device, such as the lift device of  FIG. 1 or 34 , delivering a load to the target projection shown in  FIG. 51 , according to an exemplary embodiment; 
         FIG. 53  is a pictorial view of an operator on a lift device, such as the lift device of  FIG. 1 or 34 , requesting tools through a drone delivery human machine interface, according to an exemplary embodiment; 
         FIG. 54  is a pictorial view of the operator of  FIG. 53  selecting a tool from the drone delivery interface and being delivered the selected tool by a drone, according to an exemplary embodiment; 
         FIG. 55  is a pictorial view of a drone providing a target projection for a lift device to deliver materials to, according to an exemplary embodiment; 
         FIG. 56  is another pictorial view of the drone providing a target projection for a lift device, according to an exemplary embodiment; 
         FIG. 57  is a pictorial view of a lift device, such as the lift device of  FIG. 1 or 34 , delivering materials to the target projection provided by the drone of  FIG. 56 , with the drone actively monitoring the materials as the materials are being moved toward the target projection; 
         FIG. 58  is a pictorial view of an operator monitoring and remotely controlling the operation of a placing boom or a welding boom, according to an exemplary embodiment; and 
         FIG. 59  is a pictorial view of the placing boom and the welding boom acting in concert to create a welded coupling in a structure, according to an exemplary embodiment. 
     
    
    
     DETAILED DESCRIPTION 
     Before turning to the figures, which illustrate the exemplary embodiments in detail, it should be understood that the present application is not limited to the details or methodology set forth in the description or illustrated in the figures. It should also be understood that the terminology is for the purpose of description only and should not be regarded as limiting. 
     Overview 
     Referring generally to the FIGURES, a lift device includes a deployable operator station. The deployable operator station may include two frame assemblies that are pivotally coupled with each other, a first of which is pivotally coupled with a base of the lift device. The frame assembly that is pivotally coupled with the base may be driven by a linear electric actuator to automatically deploy. The second frame assembly may be selectably rotatably coupled with the first frame assembly through an engagement mechanism, which a user may selectively disengage and then manually deploy the second frame assembly. The deployable operator station can also include various hood or shell members that are configured to interlock with each other to seal the deployable operator station and to prevent unauthorized access to various input devices of the lift device that are positioned at the deployable operator station. The lift device can include multiple user interfaces. For example, the lift device may include a first user interface at a platform or implement assembly and a second user interface where an operator is seated or stands when operating the lift device. The lift device may be a fully electric lift device that includes a lift apparatus that uses electric linear actuators and/or electric motors to raise or lower an implement assembly that is positioned at an end of the lift apparatus. 
     The lift device may be a fully electric lift device and can include a first set of batteries at the base assembly and a second set of batteries at a turntable assembly of the lift device. The turntable assembly can include a slip ring transmission (e.g., an electro-mechanical slip ring transmission) that rotatably couples a turntable member with the base assembly or the frame. The lift apparatus may be positioned on the turntable member so that operation of the slip ring transmission drives the turntable member and the lift apparatus to rotate or pivot relative to the base assembly or the frame. The first set of batteries that are positioned on the base assembly may be configured to provide electrical power to electrical components of the base assembly (e.g., for driving, steering, or axle lock-out operations). The second set of batteries that are positioned on the turntable assembly may be configured to provide electrical power to electrical components of the lift apparatus (e.g., for raising or lowering operations). 
     The first set of batteries may be configured to connect to a facility power source for charging of the first set of batteries and the second set of batteries. A charger may connect with the facility power source and transfer charging power or charging energy to the first set of batteries. The first set of batteries can provide electrical power to any of the electrical components of the base assembly through an inverter. The first set of batteries may function as a main source of power and can be used to replenish or recharge the second set of batteries as required. For example, the controller may monitor a battery level of the second set of batteries and recharge the second set of batteries using electrical energy provided by the first set of batteries. The second set of batteries can be recharged by the first set of batteries through the slip ring transmission. Specifically, the first set of batteries may transfer electrical energy through the inverter and the slip ring transmission to a charger of the turntable assembly. The charger of the turntable assembly may use the electrical power provided through the slip ring transmission to charge the second set of batteries. In this way, the slip ring transmission may serve or function as both a primary mover to drive relative rotation between the turntable member and the frame of the base assembly as well as facilitating the transfer of electrical energy from the first set of batteries to the second set of batteries. 
     In some embodiments, the controller is also configured to prevent or restrict operations of the lift apparatus based on the battery level of the second set of batteries. For example, if the battery level of the second set of batteries decreases below a first threshold, the controller may prevent operations of the lift apparatus that raise the implement assembly. The controller may also determine if the first set of batteries have sufficient battery capacity to charge the second set of batteries and may charge the second set of batteries using the first set of batteries. If the first set of batteries do not have sufficient battery capacity to charge the second set of batteries, the controller may determine that the first set of batteries should be connected to a power source for recharge and can notify an operator of the lift device (e.g., by operating a display screen, providing a visual alert, providing an aural alert, etc.). If the battery level of the second set of batteries decreases below a second threshold level and the first set of batteries still do not have sufficient capacity to recharge the second set of batteries, the controller may restrict operation of the lift apparatus completely until the first set of batteries are connected to a power source for recharging. 
     In some examples, the lift device can be used as part of an autonomous or semi-autonomous jobsite fleet. The lift device can include a controller that is configured to communicate over one or more wireless communication protocols that enable remote lift device monitoring and control. The lift device can include a communication gateway that monitors a status of the lift device (e.g., battery charge level, health, location, etc.) and transmits the status of the lift device to one or more network devices (e.g., computers, smart phones, tablets, etc.). The same network devices can be used to send remote commands, which can include driving, lifting, or other instructions that can then be performed by the lift device without needing an operator to be present. In some examples, remote commands can be sent to a human machine interface on the lift device, and provide instructions related to a specific task that can then be read or otherwise presented to an operator positioned within the lift device. In still other examples, the lift device is configured to operate with auxiliary equipment (e.g., a drone, a mobile device, etc.) that can provide tasks and specific targeted locations to the lift device for performing autonomous jobs. The lift device can include one or more cameras that can be used to provide a point-of-view on the network device that will allow for precise manual remote control of the lift device. 
     Lift Device 
     Referring particularly to  FIG. 1 , a lift device, a boom, an articulated boom, a lift, a MEWP, a telehandler, etc., shown as lift device  10  includes a base assembly  12  (e.g., a base, a main body, a vehicle, etc.), a lift apparatus  14  (e.g., a telescoping arm, an articulated arm, a boom arm, a boom, etc.), and an implement assembly  16  (e.g., a platform, a platform assembly, a work platform, a fork assembly, an apparatus, etc.). As shown in  FIG. 1 , lift device  10  is provided as a mobile elevated work platform (MEWP) where the implement assembly  16  is a work platform. Implement assembly  16  may be replaceable with different implement assemblies (e.g., a fork assembly) to transition the lift device  10  from being a MEWP to being a material handler (MH). When lift device  10  is a MH, implement assembly  16  can be a fork carriage that may serve as a versatile attachment interface where a work platform designed with forklift pockets can be attached, a pair of forks for material handliner, etc. Additionally, the fork carriage can be used for other tool attachments so that the implement assembly  16  is interchangeable. 
     Base assembly  12  includes a frame  20  (e.g., a carriage, a structural member, a support member, a chassis, a frame member, etc.), and multiple tractive elements  22  (e.g., wheels, treads, rotatable members, rollers, etc.). Base assembly  12  also includes a primary mover (e.g., an electric motor, an internal combustion engine, a hydraulic motor, a pneumatic motor, etc.), shown as electric motor  24 . Electric motor  24  can be configured to provide mechanical power (e.g., rotational kinetic energy) to tractive elements  22  (e.g., through a transmission, a power transmitting system, one or more gearboxes, etc.) for transportation of lift device  10 . Electric motor  24  may also provide mechanical power for operation of lift apparatus  14 , a steering system of lift device  10 , deployment of a deployable operator station of lift device  10 , etc., or for any other function, feature, etc., of lift device  10  that requires mechanical power to operate. Electric motor  24  may represent a single or a collection of electric motors that are configured to consume or receive electrical energy from one or more batteries, power cells, capacitors, power storage devices, power storage systems, etc., shown as electrical energy storage devices  40  to generate the mechanical power. Tractive elements  22  can receive the mechanical power from electric motor  24  and rotate relative to frame  20 . Tractive elements  22  can each be pivotally or rotatably coupled with frame  20  so that tractive elements  22  can rotate relative to frame  20  to facilitate a driving or transport operation of lift device  10  (e.g., to transport lift device  10  from one jobsite to another jobsite). 
     Tractive elements  22  may include a first or a front pair of tractive elements and a second or rear pair of tractive elements. The pairs of tractive elements  22  may each be rotatably or pivotally coupled with a corresponding axle (e.g., a front axle and a rear axle, respectively) that is fixedly coupled, integrally formed, welded, fastened, etc., with frame  20 . One or both of the axles may include one or more steering members (e.g., tie-rods, elongated members, etc.) that are configured to pivot or rotate tractive elements about a steering axis to indicate a direction of turn of lift device  10 . In this way, electric motor  24  and tractive elements  22  can facilitate the transportation of lift device  10  from one location to another. 
     Referring still to  FIG. 1 , base assembly  12  includes an operator station, shown as deployable operator station  100  (e.g., a cab, a housing, an enclosure, a space, a zone, a station, a standing station, a platform, etc.). Deployable operator station  100  can be fixedly coupled with frame  20  or a body of lift device  10  so that an operator may sit or stand at deployable operator station  100  and be transported with lift device  10  as lift device  10  drives and steers. Deployable operator station  100  can include a body, a frame, sidewalls, a roof, doors, windows, etc., or may otherwise form an enclosure for the operator. Deployable operator station  100  can be positioned on a left side or a right side of lift device  10 , or may be centered above frame  20 . In some embodiments, deployable operator station  100  is deployable or transitionable between an un-deployed state, position, mode, etc., and a deployed state, position, mode, etc. Deployable operator station  100  may be a complete or a partial enclosure that provides protection for the operator or shielding from environmental elements. 
     Referring still to  FIG. 1 , lift apparatus  14  is or includes a pair of articulated telescoping members, shown as first telescoping member  58  and second telescoping member  60  that are pivotally or hingedly coupled at intermediate member  44 . Second telescoping member  60  includes an outer member  26  (e.g., a first member) and an inner member  28 . Inner member  28  can be received within an inner volume of outer member  26  and may be configured to slide, translate, etc., relative to outer member  26 . In some embodiments, inner member  28  and outer member  26  are slidably coupled so that an overall length of the second telescoping member  60  can be increased or decreased to facilitate raising or lowering implement assembly  16 . Inner member  28  and outer member  26  may be configured to extend or retract through operation of a primary mover, a linear electric actuator, an electric motor, a hydraulic cylinder, a pneumatic cylinder, etc., shown as linear electric actuator  38 . Linear electric actuator  38  may draw electrical power or electrical energy from one or more batteries, power sources, energy storage devices, etc., of lift device  10  (e.g., from electrical energy storage devices  40 ) and use the electrical energy to operate to extend or retract, thereby driving inner member  28  to translate relative to outer member  26  (and thereby raising or lowering implement assembly  16  to reach an elevated location). 
     Outer member  26  can receive inner member  28  through a first or proximate end and may be rotatably or hingedly coupled with intermediate member  44  at a second or opposite end. Specifically, outer member  26  may be hingedly or rotatably coupled with an upper portion or corner of intermediate member  44 . Outer member  26  can be driven to rotate or pivot relative to intermediate member  44  to raise or lower implement assembly  16  by a linear actuator, an electric motor, a linear electric actuator, a pneumatic actuator, a hydraulic cylinder, etc., shown as linear electric actuator  30 . Linear electric actuator  30  can be pivotally coupled at a first end with outer member  26  and at a second end with a portion of intermediate member  44 . 
     Lift apparatus  14  can include an intermediate member, an elongated member, etc., shown as medial member  36 . Medial member  36  can be pivotally coupled with inner member  28  through a hinge, a pin, a hinged coupling, etc., shown as pin  32 . Inner member  28  may extend into an inner volume of outer member  26  at a first end and rotatably couple with medial member  36  at an opposite or second end. Medial member  36  can be configured to be driven to rotate about pin  32  to pivot or rotate implement assembly  16  through a linear electric actuator  42 . Linear electric actuator  42  may be pivotally coupled at a first end with medial member  36  and pivotally coupled at a second end with inner member  28  so that extension or retraction of linear electric actuator  42  drives rotation of medial member  36  and implement assembly  16  about pin  32  relative to inner member  28 . 
     Referring still to  FIG. 1 , the first telescoping member  58  of lift apparatus  14  can include an outer member  48  and an inner member  46 . Outer member  48  may receive inner member  46  through an inner volume so that inner member  46  can slidably couple with outer member  48 . Inner member  46  may be rotatably or hingedly coupled with intermediate member  44  (e.g., at a bottom portion of intermediate member  44 ). In some embodiments, a first or proximate end of inner member  46  extends into outer member  48  and a second or distal end of inner member  46  is rotatably or hingedly coupled with intermediate member  44 . Outer member  26  may also hingedly or rotatably couple with intermediate member  44  (e.g., at an upper end of intermediate member  44 ). In this way, intermediate member  44  may be a linkage or intermediate member that hingedly, rotatably, or pivotally couples with outer member  26  at a first end (e.g., an upper end) and hingedly, rotatably or pivotally couples with inner member  46  at a second end (e.g., a lower end). Intermediate member  44  may be an upright structural member that forms a linkage between the second telescoping member  60  formed by outer member  26  and inner member  28  and the first telescoping member  58  or apparatus formed by inner member  46  and outer member  48 . Inner member  46  and outer member  48  may form a telescoping member that is the same as or similar to the second telescoping member  60  formed by inner member  28  and outer member  26 . The first telescoping member  58  (formed by outer member  48  and inner member  46 ) may extend from a front or forwards portion of lift device  10  in a rearwards direction (e.g., from base assembly  12  or frame  20 ) while the first telescoping member (formed by outer member  26  and inner member  28 ) may extend from a rearwards portion or area of lift device  10  (e.g., from intermediate member  44 ) in a forwards direction. 
     Referring still to  FIG. 1 , outer member  48  can be rotatably, pivotally, or hingedly coupled with base assembly  12  through a support member  50 . Support member  50  can be fixedly coupled with base assembly  12  or frame  20  and can include a portion that is configured to receive an end of outer member  48  and pivotally couple with the end of outer member  48 . Lift apparatus  14  also includes a linear electric actuator  52  that is configured to pivotally or hingedly couple at one end with base assembly  12  (e.g., with support member  50 ) and a second end or an opposite end with outer member  48 . Linear electric actuator  52  can be configured to extend or retract to pivot outer member  48  relative to support member  50 . 
     Referring still to  FIG. 1 , lift apparatus  14  can include a linear electric actuator  54  that is configured to extend or retract to drive inner member  46  to translate relative to outer member  48 . In some embodiments, linear electric actuator  54  is positioned within outer member  48  so that extension of linear electric actuator  54  drives inner member  46  to translate to increase an overall length of inner member  46  and outer member  48  while retraction of linear electric actuator  54  drives inner member  46  to translate to decrease the overall length of inner member  46  and outer member  48 . It should be understood that linear electric actuator  52  and linear electric actuator  54  may be the same as or similar to any of the other linear electric actuators described herein (e.g., linear electric actuator  42 ) and can be configured to receive or obtain electrical energy or electrical power from electrical energy storage devices  40 . In some embodiments, linear electric actuator  52  and linear electric actuator  54  are also configured to receive control signals from controller  200  and use the control signals to operate to perform a requested function of lift apparatus  14 . 
     As depicted in  FIG. 45 , the lift device  10  is configured to move between an extended work configuration and a more compact travel position. In the work configuration, the lift apparatus  14  and implement assembly  16  is extended outward, forward from the frame  20  and forward from the lift device  10 , generally. In the compact travel position, the implement assembly  16  is retracted inward, nearer the frame  20 . The medial member  36  can be rotated rearward, so that the implement assembly rotates upward, over a portion of the frame  20 . Similarly, the intermediate member  44  can also rotate rearward, which urges the outer member  26  and entire lift apparatus  14  and implement assembly  16  rearward, toward and over the frame  20 . Traditional lift devices have very long booms, which typically results in the implement assembly being positioned well forward of the lift chassis. This conventional configuration makes transportation difficult, as the distance between the chassis and implement significantly limits over-the-road transport on trailers. Using the multi-telescoping boom lift apparatus  14  of the lift device  10 , significant space savings are realized. The implement assembly  16  is retracted and rotated to be positioned nearly entirely (e.g., at least 50%) over the frame  20 . Accordingly, trailer or other types of transport are significantly improved relative to conventional lifts, as the footprint of the lift device  10  is significantly limited. 
     Referring particularly to  FIG. 2 , lift device  10  is shown in a material handler mode where implement assembly  16  include a pair of elongated members, shown as forks  18 . Implement assembly  16  can be fixedly coupled with medial member  36  of lift apparatus  14  so that implement assembly  16  is raised or lowered through operation of lift apparatus  14 . Implement assembly  16  may also include a bucket, a platform (e.g., an aerial work platform as shown in  FIG. 1 ), a drill, an auger, etc., or any other equipment. 
     Referring again to  FIG. 1 , lift device  10  can include a controller  200  that is configured to operate lift device  10  to perform the various functions described herein. For example, controller  200  may monitor a status, battery health, state of health, state of charge, capacity, etc., of electrical energy storage devices  40  and can operate a human machine interface (HMI) (e.g., HMI  500  as shown in  FIG. 3 ), a user interface, a display screen, etc., to provide the operator of lift device  10  with indications or notifications regarding status or performance characteristics of electrical energy storage devices  40 . Controller  200  can also generate control signals for electric motor  24  and the steering system (e.g., that may include linear electric actuators to pivot tractive elements  22  to indicate a direction of turn). Controller  200  can also generate control signals for any of linear electric actuator  52 , linear electric actuator  54 , linear electric actuator  30 , linear electric actuator  38 , or linear electric actuator  42  to operate lift apparatus  14  (e.g., to raise or lower implement assembly  16 ). Controller  200  may generate control signals to operate lift device  10  in response to receiving a user input to operate lift device  10  through an HMI or user input device (e.g., HMI  500 ). The HMI or user input device may be positioned at operator station  34  or on an exterior surface of lift device  10  (as represented by HMI  500  in  FIG. 3 ). The HMI or user input device may include any number of buttons, levers, touchscreens, joysticks, user input devices, display screens, steering wheels, etc., that are configured to receive a user input and provide controller  200  with a signal indicating the user input. Controller  200  can then use the signal to determine which operations of lift device  10  are being requested to be performed and can generate control signals for various controllable elements of lift device  10  (e.g., electric motor  24 , linear electric actuator  30 , linear electric actuator  38 , linear electric actuator  42 , etc.) to perform the requested function or operation. 
     Deployable Operator Station 
     Referring to  FIGS. 2-3, 11-23, and 34-45 , the deployable operator station  100  is operable or transitionable between a first position or state (e.g., a stowed state, a tucked state, a stowed position, a tucked position, etc.) as shown in  FIG. 3  and a second position or state (e.g., a deployed state, a deployed position, etc.) as shown in  FIG. 2 . Advantageously, deployable operator station  100  can be transitioned into the stowed position to facilitate restricting or limiting access to various control panels, HMIs, operator panels, control devices, etc., of lift device  10  that may be positioned within or at deployable operator station  100 . This can prevent a likelihood that an unauthorized individual may access and operate lift device  10  (e.g., reduce a likelihood of theft, provide protection for the various control panels, HMIs, operator panels, control devices, etc., reduce a likelihood of damage to the various components of the deployable operator station  100 , etc.). 
     Referring particularly to  FIGS. 2-3 and 11 , deployable operator station  100  can be transitioned between the deployed position shown in  FIG. 2  and the tucked or stowed position as shown in  FIGS. 3 and 11 . Deployable operator station  100  can include a first shell member  106  (e.g., a first planar member, a first housing member, a hood member, a hood, etc.), a second shell member  108  (e.g., a planar member, a housing member, a hood, etc.), and a third shell member  109  (e.g., a planar member, a housing member, a hood, etc.). First shell member  106 , second shell member  108  and third shell member  109  can be configured to interlock, abut, engage, contact, etc., each other when deployable operator station  100  is transitioned into the tucked or stowed position (as shown in  FIGS. 3 and 11 ). In some embodiments, first shell member  106  is configured to rotate or pivot about an axis  126  as deployable operator station  100  is transitioned from the tucked or stowed position (as shown in  FIGS. 3 and 11 ) to the deployed position (as shown in  FIG. 2 ). Specifically, first shell member  106  can rotate in direction  129  about axis  126  as deployable operator station  100  is deployed. First shell member  106  may be hingedly or pivotally coupled with base assembly  12  so that first shell member  106  can be driven to rotate or pivot about axis  126  as deployable operator station  100  is deployed. Alternatively, and as depicted in  FIGS. 34-45 , the first shell member  106  can be pivotally coupled with the base assembly  12  at a rear of the first shell member  106 . 
     Second shell member  108  can be fixedly coupled with base assembly  12  or frame  20  and may remain stationary as deployable operator station  100  is deployed or tucked/stowed. For example, second shell member  108  may be a vertically extending sidewall that interlocks, abuts, engages, fits with, etc., first shell member  106  when deployable operator station is tucked or stowed (as shown in  FIGS. 3 and 4 ). Third shell member  109  can be fixedly coupled with a first frame assembly  102  (e.g., a rollover protective structure, ROPS) of deployable operator station  100  which rotates about axis  122 . Thus, as deployable operator station  100  is transitioned between the deployed or tucked positions, third shell member  109  may rotate or pivot about axis  122 . When deployable operator station  100  is tucked (e.g., transitioned into the position shown in  FIGS. 3-4 ), third shell member  109  may interlock with, abut, contact, engage, fit with, etc., first shell member  106  and second shell member  108  to form a shell, a structure, a housing, a container, etc. to enclose various components of deployable operator station  100 . Alternatively, and as depicted in  FIGS. 34-35 , the third shell member  109  is omitted and the first shell member  106  rotates rearwardly relative to the second shell member  108  to transition to the deployed position. In some examples, the first shell member  106  is biased toward the open position by a spring or other biasing element. Accordingly, unlocking or unlatching the first shell member  106  from the second shell member  108  allows the first shell member  106  to naturally and passively raise away from the second shell member  108  to the deployed position. Alternatively, motors and/or actuators can be used to raise the first shell member  106  away from the second shell member  108 . One or more buttons can be positioned along the outside of the second shell member  108  that can be pressed or otherwise manipulated by a user to both unlock and transition the first shell member  106  to the open position. In some examples, the button(s) are positioned beneath a locked, shielded cabinet that prevents unauthorized access to the buttons and to the deployable operator station  100 , more generally. In still other examples, one or more of the lock and/or actuators can be remotely controlled, and can transition from a locked to unlocked position using wireless communication. Various different types of locking mechanisms can be used, including mechanical key-style locks as well as automatic or electronic locks having RFID readers, Bluetooth readers, near field communication (NFC) tag readers, and the like, to open and transition the first shell member  106  to the deployed position. 
     In addition to the deployable operator station  100 , the lift device  10  can include a deployable or selectively accessible storage compartment  113 . As depicted in  FIGS. 37 and 39 , the storage compartment  113  is generally configured like the operator station  100 , with a first shell member  117  that is rotatably and/or hingedly coupled to a second shell member  119 . The first shell member  117  and second shell member  119  together define the storage compartment  113 , which can be used to hold tools, fuel, food, and/or other necessary materials for performing tasks at a jobsite. The storage compartment  113  can be incorporated into versions of the lift device  10  that do not include an engine (e.g., versions that are fully battery powered, etc.). 
     In some examples, and as shown in  FIGS. 34-35 and 37-40 , the lift device  10  includes one or more sets of steps  121  to help a user board the operator station  100  or access the storage compartment  113 . The steps  121  can be positioned on one or both sides of the lift device  10 , and can be directly mounted to or otherwise formed in the base assembly  12 . The steps  121  extend downward, toward the ground below the lift device  10 . Alternatively, the steps  121  can be selectively deployed. For example, the steps  121  can be part of a retractable assembly that only extends downward when the first shell member  106  is in the open or deployed position. When the first shell member  106  is transitioned to the back to the tucked or stowed position, the steps  121  can automatically retract inward, to reduce the outer perimeter of the lift device  10  and further restrict unauthorized access or tampering with the deployable operator station  100  or the storage compartment  113 , since these components are elevated off the ground. In some examples, a button or switch can be positioned within the deployable operator station  100  so that a user within the operator station  100  can retract the steps  121  once the user is properly positioned within the operator station  100 . In some embodiments, a seat  124  within the operator station  100  includes a sensor (e.g., a pressure sensor, switch, load sensor, etc.) that detects a load upon the seat  124 . When a load is detected on the seat  124  (which would correspond to a user being seated within the operator station  100 ), the steps  121  will retract. When no load is detected, the steps  121  deploy (or remain deployed) to allow a user to enter or exit the operator station  100  easily. 
     Referring particularly to  FIG. 2 , deployable operator station  100  can include the first frame assembly  102 , and a second frame assembly  104  (e.g., a falling object protective structure, FOPS, an overhead protective structure, etc.). First frame assembly  102  can be rotatably or pivotally coupled with base assembly  12  (e.g., with frame  20 ) at a first end, and pivotally or rotatably coupled with second frame assembly  104  at a second or distal end. Second frame assembly  104  may be configured to rotate or pivot about an axis  120  relative to first frame assembly  102 . In this way, first frame assembly  102  and second frame assembly  104  may rotate or pivot relative to base assembly  12  about axis  122  while second frame assembly  104  can be configured to rotate or pivot relative to first frame assembly  102  about axis  120  as deployable operator station  100  is transitioned between the deployed position and the tucked/stowed position. Deployable operator station  100  can also include a seat  124 . 
     Referring particularly to  FIG. 3 , lift device  10  can include a rotator assembly, a platform rotator assembly, a turntable, etc., shown as turntable assembly  800 . Turntable assembly  800  can include a turntable member  803  that is configured to pivot or rotate about a central axis  62 . Lift apparatus  14  can be coupled with base assembly  12  through turntable assembly  800  to facilitate rotation of lift apparatus  14  relative to base assembly  12  about central axis  62 . In particular, support member  50  can be fixedly coupled with turntable member  803  so that lift apparatus  14  can be rotated or pivoted about central axis  62  relative to frame  20 . Deployable operator station  100  can be positioned on turntable member  803  so that rotation of turntable member  803  relative to base assembly  12  or relative to frame  20  results in rotation of deployable operator station  100  relative to frame  20 . 
     Referring still to  FIG. 3 , turntable assembly  800  can include a platform rotator, a motor, an electric motor, etc., shown as turntable motor  64 . Turntable motor  64  is shown as an electric motor that can consume electrical energy from energy storage device  40  to generate rotational kinetic energy to drive turntable member  803  to rotate relative to frame  20 . Turntable motor  64  can also be an internal combustion engine, a hydraulic motor, a pneumatic motor, etc., or any other primary mover. In some embodiments, turntable motor  64  receives control signals from controller  200  so that controller  200  operates turntable motor  64  (e.g., to rotate turntable assembly  800  a predetermined or desired angular amount based on a user input or a user request). Turntable motor  64  can be configured to drive turntable member  803  through a gear box, a transmission, a spur gear, a ring gear, a worm gear, etc., or any other gear or power transmitting configuration or combination thereof. Rotation of turntable assembly  800  relative to frame  20  can facilitate access of elevated locations that are angularly offset relative to lift device  10 . 
     Referring particularly to  FIGS. 5-9 , a portion of deployable operator station  100  is shown in greater detail, according to an exemplary embodiment. Deployable operator station  100  includes a frame, a base, a support structure, etc., shown as support structure  110 . Support structure  110  is fixedly coupled with base assembly  12  or with frame  20  and provides structural support for deployable operator station  100 . Support structure  110  can vertically extend a distance from a planar member  111 . Support structure  110  can be formed from multiple structural members that are stacked and have various widths. Support structure  110  is configured to support first frame assembly  102  and second frame assembly  104 . 
     First frame assembly  102  is hingedly or pivotally coupled with support structure  110  so that first frame assembly  102  can rotate or pivot about axis  122  relative to support structure  110 . As shown in  FIGS. 12-16 , first frame assembly  102  can include a first frame member, a first elongated member, etc., shown as first member  112   a  and a second frame member, a second elongated member, etc., shown as second member  112   b . First member  112   a  and second member  112   b  are laterally offset a distance  130  from each other. First frame member  112   a  and second frame member  112   b  are each pivotally or rotatably coupled with support structure  110  at a first end and pivotally or rotatably coupled with second frame assembly  104  at an opposite or distal end. First frame member  112   a  and second frame member  112   b  may each be pivotally coupled with support structure  110  through a pin  134 . First frame assembly  102  can also include one or more laterally extending frame members  132  that extend between first frame member  112   a  and second frame member  112   b . Laterally extending frame members  132  can provide additional structural support for first frame assembly  102 . 
     First frame member  112   a  and second frame member  112   b  are each fixedly coupled or integrally formed with a corresponding connecting member  118 . Specifically, first frame member  112   a  is fixedly coupled or integrally formed with a first connecting member  118   a  and second frame member  112   b  is fixedly coupled or integrally formed with a second connecting member  118   b . First frame assembly  102  is pivotally or hingedly coupled with second frame assembly  104  through first connecting member  118   a  and second connecting member  118   b . First frame assembly  102  is pivotally or hingedly coupled with support structure  110  through pins  134  at a first end of frame members  112   a - 112   b  and pivotally or hingedly coupled with second frame assembly  104  through connecting members  118   a - 118   b  at a second or distal end of frame members  112   a - 112   b.    
     Referring particularly to  FIGS. 14-18 , connecting members  118  each include a corresponding pin, cylindrical member, rotatable member, interfacing member, etc., shown as pin  136 . Pin  136  may define axis  120  about which second frame assembly  104  rotates or pivots relative to first frame assembly  102 . Connecting members  118  can each include parallel or laterally offset members between which a corresponding portion of second frame assembly  104  extends. The corresponding portion of second frame assembly  104  may rotatably couple with first frame assembly  102  through connecting members  118 . Deployable operator station  100  also includes an engagement mechanism  180  that is configured to selectably lock or limit relative rotation between first frame assembly  102  and second frame assembly  104 . Engagement mechanism  180  can be transitioned between a locked position or state and an unlocked or disengaged position or state through a user input. Engagement mechanism  180  facilitates locking angular orientation of second frame assembly  104  relative to first frame assembly  102  at various predetermined positions (e.g., at a stowed or tucked angular position of second frame assembly  104  relative to first frame assembly  102  as shown in  FIGS. 12, 14 and 15 , and a deployed angular position or second frame assembly  104  relative to first frame assembly  102  as shown in  FIGS. 16-17 ). 
     Referring particularly to  FIGS. 15-17 , second frame assembly  104  includes one or more frame members  114  and one or more laterally extending frame members  116 . Laterally extending frame member  116  may have a square or circular cross-sectional shape and can provide additional structural support for frame members  114 . In some embodiments, each frame member  114  includes a corresponding aperture through which laterally extending frame member  116  extend. As shown in  FIG. 15 , a pair of outermost members  115  of the frame members  114  are received within connecting members  118  and rotatably or pivotally couple with connecting members  118  through pins  136 . The members  114  that are between outermost members  115  can each include a slot  158  along which a bar, beam, elongated member, etc., of engagement mechanism  180 , shown as bar  154  can extend and translate. Frame members  114  may be evenly laterally spaced between outermost members  115 . Outermost members  115  can also each include an opening, aperture, hole, bore, etc., shown as aperture  156  into which bar  154  can be inserted and stored (e.g., by a user, an operator, a technician, etc.). 
     Referring particularly to  FIGS. 17-18 , engagement mechanism  180  is shown in greater detail, according to an exemplary embodiment. Engagement mechanism  180  is configured to facilitate interlocking first frame assembly  102  and second frame assembly  104  at predetermined relative angular positions. Engagement mechanism  180  can be transitioned between an engaged or a locked state and an unlocked state through a user input at bar  154 . For example, a user may translate bar  154  along slots  158  by providing a force in direction  160  on bar  154  to transition engagement mechanism  180  into the unlocked state. Once engagement mechanism  180  is transitioned into the unlocked state, the user may provide a rotational force or a torque to second frame assembly  104  to rotate second frame assembly  104  relative to first frame assembly  102  to various predetermined angular positions (e.g., a deployed angular position and a tucked or stowed angular position). Once the user has rotated the second frame assembly  104  to one of the predetermined angular positions, the user may release bar  154  to lock second frame assembly  104  at a current angular position relative to first frame assembly  102 . 
     Referring still to  FIGS. 17-18 , engagement mechanism  180  includes connecting members  118 . Connecting members  118  each include a first notch, a first slot, etc., shown as deployed slot  148 , and a second notch, a second slot, etc., shown as stowed slot  151 . Second frame assembly  104  includes a housing member, a guide member, etc., shown as guide member  138 . Guide member  138  is fixedly coupled with an interior or inwards facing surface of outermost member  115  so that guide member  138  is configured to rotate or pivot with outermost member  115  as second frame assembly  104  is rotated or pivoted relative to first frame assembly  102  about axis  120 . Guide member  138  includes an inner volume, a track, a channel, an opening, a hollow portion, etc., that is configured to receive a plunger, an engagement member, an interlocking member, etc., shown as plunger  140 . Plunger  140  may be configured to translate or slidably couple with an interior surface or an interior periphery of guide member  138 . Plunger  140  can have a circular cross-sectional shape and guide member  138  may have an inner volume with a correspondingly shaped cross-section so that plunger  140  can translate relative to guide member  138 . In some embodiments, plunger  140  is configured to translate relative to guide member  138  to engage, interlock with, be positioned within, abut, contact, be received within, etc., deployed slot  148  and stowed slot  151 . When plunger  140  translates into engagement with connecting member  118  at deployed slot  148  or at stowed slot  151 , an angular position of second frame assembly  104  relative to first frame assembly  102  is locked or fixed. 
     In some embodiments, a first end  146  of plunger  140  is configured to interlock with, engage, interface with, be received within, etc., slot  148  and/or slot  151 . An opposite end  142  of plunger  140  may extend outwards from an opposite side of guide member  138  and can be fixedly coupled, attached, secured, etc., with a cable, a rope, etc., shown as tensile member  144 . Tensile member  144  extends in a same direction as frame members  114  or outermost members  115  of second frame assembly  104 . Tensile member  144  can extend through aligned or corresponding apertures of each laterally extending frame member  116  and may be fixedly coupled with bar  154 . A first end of tensile member  144  is fixedly coupled or attached with plunger  140  at opposite end  142 , while a second or distal or opposite end of tensile member  144  is fixedly coupled, attached, secured, etc., with bar  154 . In this way, translation of bar  154  (e.g., through a user inputting a force in direction  160 ) in direction  160  is transferred through tensile member  144  and translates plunger  140  relative to guide member  138  so that first end  146  of plunger  140  is translated out of engagement with deployed slot  148  or stowed slot  151 . This allows a user to selectively translate plunger  140  out of engagement with connecting members  118 , thereby transitioning engagement mechanism out of the locked state into the unlocked state. The user may then maintain bar  154  at the translated position and rotate second frame assembly  104  until plunger  140  is proximate a desired one of deployed slot  148  or stowed slot  151 . Once second frame assembly  104  is rotated to the angular position of deployed slot  148  or stowed slot  151  as desired by the operator, the operator may release bar  154  so that plunger  140  transitions into engagement with the desired one of deployed slot  148  or stowed slot  151 . 
     Referring particularly to  FIG. 18 , engagement mechanism  180  can include a spring or a resilient member, shown as spring  161 . Spring  161  may bias translation of plunger  140  relative to guide member  138  in a direction so that plunger  140  engages deployed slot  148  or stowed slot  151 . In this way, engagement mechanism  180  may be spring loaded so that release of bar  154  results in automatic transition of engagement mechanism  180  into the locked state (depending on a current angular position of second frame assembly  104  relative to first frame assembly  102 ). In some examples, the second frame assembly  104  can be vertically adjustable relative to the first member  112   a  and second member  112   b  as well. The second frame assembly  104  can include proximity sensors to detect a position of an operator within the operator station  100 , and a position of the second frame assembly  104  will automatically adjust to reduce the spacing between the head of an operator to provide further security. 
     Referring particularly to  FIG. 14 , deployable operator station  100  can include a linear electric actuator  164  that is configured to deploy, rotate, drive, pivot, etc., first frame assembly  102  and second frame assembly  104  relative to support structure  110  for deployment. In particular, linear electric actuator  164  can be configured to drive first frame assembly  102  to rotate about axis  122  to partially deploy deployable operator station  100 . Linear electric actuator  164  can draw electrical power from electrical energy storage devices  40  and use the electrical energy to generate linear motion. The linear motion may be transferred to first frame assembly  102  to drive first frame assembly  102  to rotate about axis  122  (e.g., in direction  123 ) for deployment of deployable operator station  100 . For example, linear electric actuator  164  can be translationally fixedly coupled and pivotally coupled at opposite ends with support structure  110  (or planar member  111 ) and first frame assembly  102  (e.g., first member  112   a  or second member  112 ). In this way, extension and retraction of linear electric actuator  164  drives rotation of first frame assembly  102  and second frame assembly  104  about axis  122  for deployment or retraction/stowing. In some embodiments, controller  200  is configured to generate control signals for linear electric actuator  164  to deploy deployable operator station  100  in response to receiving a user input from HMI  500 . In some embodiments, controller  200  only generates control signals to deploy deployable operator station  100  if the operator or user provides credentials (e.g., via the HMI  500 ) that indicate that the user has access. In other embodiments, the HMI is physically secured (e.g., in a locked box) so that only users with keys to access the HMI can deploy deployable operator station  100 . 
     Referring still to  FIG. 14 , second frame assembly  104  may be manually rotated about axis  120  for complete deployment of deployable operator station  100 . For example, deployable operator station  100  may be automatically partially deployed (e.g., through operation of linear electric actuator  164 ) and then fully deployed through manual actuation or translation of bar  154  and rotation of second frame assembly  104  relative to first frame assembly  102 . 
     Referring particularly to  FIG. 16 , deployable operator station  100  can include a seatback  166 , a first armrest  128   a , a second armrest  128   b , and a seat pan  168 . Seatback  166  can be fixedly coupled with laterally extending frame member  133 . In some embodiments, seatback  166  and laterally extending frame member  133  are both rotatably coupled with a laterally extending member  170  that extends between first member  112   a  and second member  112   b . In this way, seatback  166  and laterally extending frame member  133  can be pivoted or rotated (e.g., automatically through operation of an electric motor, a linear electric actuator, etc.) between a deployed position and a tucked position. In other embodiments, laterally extending frame member  133  is fixedly coupled or integrally formed with first member  112   a  and second member  112   b.    
     Referring still to  FIG. 16 , first armrest  128   a  and second armrest  128   b  may be hingedly, pivotally, or rotatably coupled with first frame member  112   a  and second frame member  112   b , respectively. First armrest  128   a  and second armrest  128   b  may be rotatable or pivotable between a deployed position (as shown in  FIG. 9 ) and a tucked or stowed position (as shown in  FIG. 8 ). In some embodiments, first armrest  128   a  and second armrest  128   b  are configured to be transitioned between the deployed position and the tucked or stowed position manually (e.g., by a user) or may be automatically transitioned between the deployed position and the tucked or stowed position automatically (e.g., by operation of a corresponding linear electric actuators or electric motors that may receive control signals generated by controller  200  in response to receiving a user input via HMI  500 ). 
     Referring still to  FIG. 16 , seat pan  168  can be rotatably or pivotally coupled with laterally extending member  170  and may be transitionable between a deployed position (as shown in  FIG. 16 ) and a tucked or stowed position (as shown in  FIG. 15 ). Seat pan  168  can be transitioned manually between the deployed position and the tucked or stowed position or may be automatically transitioned between the tucked or stowed position and the deployed position (e.g., through operation of a linear electric actuator). 
     Referring particularly to  FIG. 15 , deployable operator station  100  can include multiple rubber members, rubber stoppers, absorbing members, etc., shown as rubber stoppers  172 . Rubber stoppers  172  can be positioned along (e.g., spaced along) a laterally extending frame member  174  that extends between first frame member  112   a  and second frame member  112   b  near the ends of first frame member  112   a  and second frame member  112   b  that include pins  134  (e.g., the ends of first frame member  112   a  and second frame member  112   b  that pivotally couple with support structure  110 ). Rubber stops  172  can be configured to engage, abut, contact, etc., a corresponding portion of a surface of seat pan  168  when seat pan  168  is transitioned into the deployed position. 
     Referring particularly to  FIG. 20 , a portion of deployable operator station  100  is shown in greater detail.  FIG. 20  specifically shows a seating arrangement of deployable operator station  100 . Seat pan  168  can be covered with a cushion or a padding  192  to facilitate user comfort when seated. First armrest  128   a  includes a cover, a rest member, etc., shown as rest member  178 . Rest member  178  may be a rigid or flexible material that provides an area for an operator to rest their arm. 
     Referring particularly to  FIGS. 20 and 21 , first armrest  128   a  may include a joystick or a pivotable user input device, shown as joystick  190 . Joystick  190  is a user input device that is configured to pivot relative to first armrest  128   a  to operate lift apparatus  14 . In some embodiments, first armrest  128   a  is an armrest for a user&#39;s right hand so that the user can operate lift apparatus  14  with their right hand. Joystick  190  may be pivoted or rotated by the user and can generate input signals for controller  200 . Controller  200  receives the input signals from joystick  190  and operates lift apparatus  14  (e.g., the various controllable elements or linear electric actuators that are configured to raise or lower lift apparatus  14 ) according to the input signals obtained from joystick  190 . 
     Referring still to  FIGS. 20 and 21 , first armrest  128   a  may include a lever twist input device  194 . In some embodiments, lever twist input device  194  is configured to receive a user input (e.g., to rotate between various predetermined selections or positions) to select a different function of lift apparatus  14  or to select a different function of joystick  190 . For example, when lever twist input device  194  is in a first position, joystick  190  may operate lift apparatus  14 , or operate a first function of lift apparatus  14 , while in a second position, joystick  190  may be used to operate a different subsystem or system of lift device  10  or may operate a second function of lift apparatus  14 . As shown in  FIG. 20 , joystick  190  can be positioned at an outer end  182  of first armrest  128   a.    
     Referring particularly to  FIGS. 20 and 19 , second armrest  128   b  includes a driving and steering joystick  188 , a drive and steer enable switch  186 , and a button  184 . Driving and steering joystick  188  can be a thumb joystick that is configured to be operated or pivoted by a user&#39;s thumb. In some embodiments, driving and steering joystick  188  is the same as or similar to joystick  190 . For example, driving and steering joystick  188  can be actuated or pivoted by the user&#39;s thumb and may generate input signals for controller  200 . Controller  200  can use the input signals to generate control signals for electric motor  24  or a driving system and/or steering system of lift device  10  that drives tractive elements  22  for driving and/or steering operations. The user may actuate drive and steer enable switch  186  to generate input signals for controller  200  to activate or deactivate driving and steering operations of lift device  10 . 
     Referring particularly to  FIGS. 22 and 23 , deployable operator station  100  can include a linear electric actuator  164  that is configured to drive first shell member  106  to pivot or rotate relative to base assembly  12  about axis  126 . First shell member  106  may be supported by and hingedly couple with base assembly  12  through a support structure  127  that fixedly couples with planar member  111  and includes a corresponding engagement portion that fixedly couples with first shell member  106 . Support structure  127  can include a hinged coupling therebetween to facilitate rotation of first shell member  106  about axis  126 . As shown in  FIG. 23 , first shell member  106  can be driven by linear electric actuator  302  to rotate between various angular positions (e.g., a deployed position and a tucked or stowed position), as represented by reference numbers  106   a  and  106   b . Extension of linear electric actuator  302  may cause first shell member  106  to rotate or pivot about axis  126  in a first direction for deployment of deployable operator station  100 , while retraction of linear electric actuator  302  causes first shell member  106  to rotate about axis  126  in a second direction for stowing deployable operator station  100 . 
     Referring particularly to  FIGS. 23 and 24 , deployable operator station  100  can include one or more display screens  304  (e.g., HMIs). In some embodiments, display screens  304  are configured to display various operational data of lift device  10  (e.g., elevation, position, battery status, mode, speed of travel, direction of travel, warnings, etc.). Display screens  304  can be positioned on first shell member  106  or may be otherwise positioned so that when deployable operator station  100  is deployed, the operator may view and access display screens  304 . In some embodiments, display screens  304  (e.g., display screen  304   a  and display screen  304   b ) are touch screens and can be configured to generate input signals for controller  200  to control or operate various functions of lift device  10 . 
     Split Battery Architecture 
     Referring particularly to  FIG. 4 , lift device  10  can use a split battery system  400 . Split battery system  400  may be a sub-system of base assembly  12  or turntable assembly  800 . Split battery system  400  includes base components  450  (e.g., electrical components such as actuators, batteries, chargers, controllers, etc., of the base assembly  12 ) and turntable components  460  (e.g., electrical components such as actuators, batteries, chargers, controllers, etc., of the turntable assembly  800 ). Base components  450  can be positioned (e.g., secured, attached, stored, fixedly coupled with, etc.) on frame  20 . Turntable components  460  may be positioned (e.g., secured, attached, stored, fixedly coupled with, etc.) with turntable member  803 . In some embodiments, base components  450  are stationary and are fixedly coupled with frame  20  (e.g., directly or indirectly). Turntable components  460  may be fixedly coupled with turntable member  803  so that turntable components  460  rotate or pivot with turntable member  803  relative to frame  20 . 
     Base components  450  include a receptacle  402 , a first charger  404 , a second charger  406 , a first battery pack  408 , an inverter  410 , a base control module  412 , at least one traction controller  414 , and at least one steering controller  416 . Base control module  412  may be the same as or similar to controller  200  and can include a processing circuit, a processor, and memory. In some embodiments, base control module  412  is an MC43 control module. Base control module  412  can be configured to generate control signals for first charger  404 , second charger  406 , traction controllers  414 , steering controllers  416 , and an electrical slip ring  418 . Base control module  412  can be communicably coupled with first charger  404 , second charger  406 , traction controllers  414 , steering controllers  416 , and electrical slip ring  418  through a controller area network bus (CANBUS). In some embodiments, base control module  412  is communicably coupled with first charger  404 , second charger  406 , traction controllers  414 , and steering controllers  416  through a first CANBUS and is communicably coupled with electrical slip ring  418  through a second CANBUS. 
     First charger  404  can be removably coupled with receptacle  402  and may be configured to output 50 volt DC electrical power to first battery pack  408 , inverter  410 , traction controllers  414 , and steering controllers  416 . First charger  404  may also be configured to exchange 240 volt AC electrical power with receptacle  402 . Second charger  406  can be configured to exchange 240 volt AC electrical power with receptacle  402  and first charger  404 . Second charger  406  can also be configured to output 50 volt DC to first battery pack  408 , inverter  410 , traction controllers  414 , and steering controllers  416 . 
     In some embodiments, first battery pack  408  is a primary, main, or large battery pack that is used by lift device  10 . First battery pack  408  can be positioned on frame  20  or otherwise on base assembly  12  and may be transported with lift device  10  as lift device  10  performs transportation operations. First battery pack  408  can be the same as or similar to energy storage device(s)  40 . First battery pack  408  can be configured to provide inverter  410 , traction controllers  414 , and/or steering controllers  416  with 50 volt DC electrical energy/power to perform their respective functions. First battery pack  408  can be a 22.1 KWh battery pack and may include twelve modules (e.g., twelve battery cells). 
     Inverter  410  is configured to receive 50 volt DC electrical power/energy from first battery pack  408 , first charger  404 , or second charger  406  and convert the DC electrical power/energy to 3 KW AC electrical power/energy. Inverter  410  may be a 240 VAC inverter that is configured to receive the 50 volt DC power and output 240 volt AC power. Electrical slip ring  418  can receive the 240 volt AC power and use the 240 volt AC power to operate turntable assembly  800  (e.g., to rotate the turntable relative to base assembly  12  or frame  20 ). Electrical slip ring  418  can be communicably coupled with first battery pack  408  and may be configured to exchange discrete digital control signals with first battery pack  408 . Advantageously, electrical slip ring  418  may be a high-current slip ring that is sized for traction or battery current (e.g., greater than 500 amps) to facilitate continuous rotation of turntable assembly  800 . Other telehandlers do provide continuous rotation of their turntable assemblies. 
     Referring still to  FIG. 4 , turntable components  460  can include a third charger  420 , a load  422 , a second battery pack  424 , a starter or ignition module  426 , a turntable control module  428 , and at least one actuator  430 . Third charger  420  is electrically coupled with second battery pack  424  and actuators  430 . Actuators  430  can draw 50 volt DC electrical power or electrical energy from second battery pack  424  and/or third charger  420  to perform their respective functions. Actuators  430  may be any of the linear electric actuators described herein (e.g., linear electric actuator  52 , linear electric actuator  54 , linear electric actuator  42 , linear electric actuator  30 , linear electric actuator  38 , etc.). Third charger  420  may be configured to generate electrical power or electrical energy for second battery pack  424  and can provide the electrical power or electrical energy to second battery pack  424  to charge second battery pack  424 . Third charger  420  can be configured to provide 240 volt AC electrical power or electrical energy to electrical slip ring  418 . Load  422  may be a sky or a welder electrical load. Third charger  420  can also be configured to provide electrical power or electrical energy to load  422 . Load  422  may be or include a plug (e.g., an outlet) at implement assembly  16  for powering one or more electrical devices at implement assembly  16  (e.g., a welder). 
     Turntable control module  428  is configured to generate control signals for any of electrical slip ring  418 , actuators  430 , third charger  420 , or ignition module  426 . Turntable control module  428  can be the same as or similar to base control module  412 . Turntable control module  428  may be configured to provide the control signals to any of electrical slip ring  418 , actuators  430 , charger  420 , or ignition module  426  through a CANBUS of lift device  10 . 
     Second battery pack  424  can be a secondary or smaller battery pack compared to first battery pack  408 . For example, second battery pack  424  can be a 7.4 KWh battery pack that includes four modules. Advantageously, split battery system  400  uses first battery pack  408  positioned at base assembly  12  (or on frame  20 ) and second battery pack  424  positioned at turntable assembly  800  to drive electrical slip ring  418  to perform turntable functions of lift device  10 . 
     Referring particularly to  FIG. 5 , lift device  10  includes turntable assembly  800  and base assembly  12 . Base assembly  12  includes base assembly batteries  806 , while turntable assembly  800  includes turntable batteries  802 . Turntable batteries  802  can be the same as or similar to second battery pack  424 . Base assembly batteries  806  can be the same as or similar to first battery pack  408 . In this way, electrical energy for lift device  10  can be primarily stored at base assembly batteries  806  (e.g., for operating electric motors  24  to drive/steer lift device  10 , for actuators  430 , to operate turntable assembly  800 , etc.) and also stored at turntable batteries  802 . Base assembly batteries  806  may function as a primary energy storage device or system, while turntable assembly batteries  802  may function as a secondary energy storage device or system. 
     Referring still to  FIG. 5 , base assembly  12  can include a charger  808  that is configured to operate to charge base assembly batteries  806  to maintain a minimum charge level in base assembly batteries  806 . Charger  808  can be a smart charging device that monitors charge level of base assembly batteries  806 . Turntable assembly  800  also includes a charger  804  that is configured to charge turntable batteries  802 . Charger  804  can be the same as or similar to charger  808 . Charger  804  may be third charger  420 . Charger  808  may be first charger  404  and/or second charger  406 . 
     Referring particularly to  FIG. 6 , a portion of lift device  10  is shown in greater detail. Specifically,  FIG. 6  shows frame  20  and the various components of base assembly  12  thereof. Base assembly  12  can include a left side energy storage compartment  822   a  that is positioned at a left side  152  of lift device  10  and a right side energy storage compartment  822   b  that is positioned at a right side  150  of lift device  10 . Left side energy storage compartment  822   a  can include one or more base assembly batteries  806 . Likewise, right side energy storage compartment  822   b  can include one or more base assembly batteries  806 . Left side energy storage compartment  822   a  and right side energy storage compartment  822   b  can be fixedly coupled with frame  20  on either side of frame  20  (e.g., on opposite longitudinal sides of frame  20 ). 
     Referring still to  FIG. 6 , steering system  700  can include a steering actuator  722  that is configured to pivot or rotate tractive elements  22  to indicate a direction of turn of lift device  10 . Steering actuator  722  can be a linear electric steering actuator that is configured to extend or retract to pivot tractive elements  22  for steering lift device  10 . 
     Referring still to  FIG. 6 , lift device  10  includes a base assembly controller  820  that is positioned on frame  20  and configured to operate various controllable elements of base assembly  12  or lift device  10 . Base assembly controller  820  can be base control module  412 . Base assembly controller  820  can be configured to operate a traction control system or steering system  700 . Lift device  10  also includes a base battery management system  834  that is positioned at frame  20  and configured to monitor any of base assembly batteries  806  (e.g., a state of charge, a state of health, etc.). 
     Referring still to  FIG. 6 , lift device  10  includes a slip ring transmission  812  (e.g., a rotary electrical interface, a rotating electrical connector, a collector, a swivel, an electrical rotary joint, etc.) that is fixedly coupled with frame  20 . Slip ring transmission  812  can be electrical slip ring  418 . Slip ring transmission  812  can be configured to receive electrical power or electrical energy from base assembly batteries  806  and/or turntable batteries  802  to drive turntable member  803  to rotate relative to frame  20 . Slip ring transmission  812  may define central axis  62  about which turntable assembly  800  rotates. Slip ring transmission  812  can be configured to transmit energy and/or data between base assembly  12  and turntable assembly  800 . 
     Referring still to  FIG. 6 , lift device  10  includes a power inverter  810 . Power inverter  810  is configured to receive electrical power (e.g., DC power) from base assembly batteries  806 , convert the electrical power (e.g., into AC power) and output the converted electrical power to slip ring transmission  812  to operate turntable assembly  800 . 
     Referring particularly to  FIG. 7 , slip ring transmission  812  is shown to include a first portion  814  and a second portion  816 . First portion  814  and second portion  816  can be co-axial with each other and may be configured to rotate relative to each other about central axis  62 . First portion  814  can be rotatably coupled with second portion  816  through a central shaft  818 . In some embodiments, central shaft  818  and second portion  816  are integrally formed with each other. First portion  814  can be fixedly coupled with turntable member  803 , while second portion  816  can be fixedly coupled with frame  20 . Slip ring transmission  812  can be configured to consume electrical energy to generate rotational kinetic energy to rotate first portion  814  relative to second portion  816 . 
     Referring particularly to  FIG. 8 , one of energy storage compartments  822  is shown in greater detail, according to an exemplary embodiment. It should be understood that both left side energy storage compartment  822   a  and right side energy storage compartment  822   b  may be configured similarly such that whatever is said of left side energy storage compartment  822   a  may be said of right side energy storage compartment  822   b  or vice versa. 
     Referring still to  FIG. 8 , energy storage compartment  822  includes a first frame member  828  and a second frame member  826 . First frame member  838  and second frame member  826  can be fixedly coupled with frame  20  and may extend from a lateral side of frame  20 . In some embodiments, second frame member  826  is fixedly coupled with first frame member  828  (e.g., through fasteners). First frame member  828  can be fixedly coupled with frame  20 . 
     First frame member  828  and second frame member  826  can be configured to support multiple base assembly batteries  806 . First frame member  828  and second frame member  826  can also be configured to support charger  808 . Lift device  10  also includes a manual on/off switch  824  that is configured to receive a user input. Manual on/off switch  824  may be actuated between a first position and a second position to provide a signal for controller  200 , base battery management system  834 , base assembly controller  820 , traction controllers  414 , steering controllers  416 , base control module  412 , or turntable control module  428  to activate or deactivate one or more functions of lift device  10  or to start lift device  10 . 
     Referring still to  FIG. 8 , energy storage compartment  822  can also include one or more electrically controlled switches  836 . Electrically controlled switches  836  can be fixedly coupled or positioned with one of first frame member  828  or second frame member  826 . Electrically controlled switches  836  can also provide feedback for detecting switch failure. 
     In some embodiments, energy storage compartment  822  also includes base battery management system  834 . For example, base battery management system  834  can be positioned at energy storage compartment  822  and supported by first frame member  828  and second frame member  826 . 
     Referring particularly to  FIGS. 7-8 , base assembly batteries  806  can be configured to serve as a main power source for any electric motors, actuators, systems, functions, etc., of base assembly  12  and/or turntable assembly  800 . For example, base assembly batteries  806  can provide electrical power to slip ring transmission  812  for rotating turntable member  803  relative to frame  20 . Base assembly batteries  806  can also be configured to replenish or recharge turntable batteries  802 . Similarly, turntable batteries  802  can be configured to provide electrical energy or electrical power for various electric actuators or motors of lift apparatus  14  (e.g., linear electric actuator  54 , linear electric actuator  52 , linear electric actuator  42 , and/or linear electric actuator  30 ). 
     Referring particularly to  FIG. 9 , a portion of turntable assembly  800  is shown in greater detail, according to an exemplary embodiment. Turntable batteries  802  can be fixedly coupled, attached, secured, positioned on, etc., turntable member  803 . Turntable batteries  802  can function as a main power source for various controllable elements of lift apparatus  14  and may be recharged by base assembly batteries  806 . 
     Referring still to  FIG. 9 , turntable assembly  800  can include a manual on/off switch  832 , and one or more turntable electrically-controlled switches  830 . Manual on/off switch  832  can be the same as or similar to manual on/off switch  824  of base assembly  12 . Turntable electrically-controlled switches  830  can be the same as or similar to electrically controlled switches  836  of base assembly  12 . 
     Referring still to  FIG. 9 , turntable assembly  800  includes a turntable battery management system  840  that is configured to monitor a status of or control a discharge of turntable batteries  802  (e.g., based on sensor data). Turntable battery management system  840  can be the same as or similar to base battery management system  834 . Turntable assembly  800  also includes a turntable master controller  842  that is responsible for operating the various controllable elements that draw power from turntable batteries  802  (e.g., the linear electric actuators of lift apparatus  14 ). 
     Turntable member  803  may support turntable batteries  802 , charger  804 , manual on/off switches  832 , electrically-controlled switches  830 , turntable battery management system  840 , or turntable master controller  842 . In this way, turntable batteries  802 , charger  804 , manual on/off switches  832 , electrically-controlled switches  830 , turntable battery management system  840 , and turntable master controller  842  may rotate or pivot with turntable member  803  about central axis  62  relative to frame  20 . 
     Referring to  FIGS. 4-9 , turntable batteries  802  can be replenished or recharged by base assembly batteries  806  through power inverter  810  (e.g., inverter  410 ), slip ring transmission  812 , charger  808  (e.g., the charger  808  of base assembly  12  or the charger  804  of turntable assembly  800 ). Power inverter  810  may be configured to convert DC power from base assembly batteries  806  to AC power and provide AC power to slip ring transmission  812 . Slip ring transmission  812  can transmit AC power or electrical energy from power inverter  810  to charger  804 . Charger  804  may receive the AC power or electrical energy from slip ring transmission  812  and recharge or replenish turntable batteries  802  so that lift apparatus  14  or the various linear electric actuators thereof can draw electrical power from turntable batteries  802 . Controller  200 , turntable battery management system  840 , turntable master controller  842 , base assembly controller  820 , base battery management system  834 , base control module  412 , or turntable control module  428  can cooperatively or individually regulate energy balance between turntable batteries turntable batteries  802  and base assembly batteries  806 . 
     Referring again to  FIG. 8 , energy storage compartments  822  can be modular base energy storage compartments. Each energy storage compartment  822  may include six base assembly batteries  806 , charger  808 , manual on/off switch  824 , and two electrically-controlled switches  836 . Lift device  10  can include two energy storage compartments  822  positioned on either side of frame  20 . Manual on/off switch  824  can be a manual disconnect switch to disconnect base assembly batteries  806 . 
     Referring particularly to  FIGS. 5 and 9 , lift apparatus  14  can be configured to draw electrical power from turntable batteries  802  when operating to perform various lift apparatus functions such as raising or lowering implement assembly  16 , telescoping outer member  26  relative to inner member  28 , rotating turntable assembly  800 , etc. The various linear electric actuators or electric motors that perform these functions may draw power from turntable batteries  802  as long as an energy or charge level of turntable batteries  802  is maintained above a certain level. Turntable batteries  802  may be replenished by base assembly batteries  806  to maintain turntable batteries  802  above the level. If turntable batteries  802  are unable to provide sufficient electrical energy to lift apparatus  14  or the various controllable elements required to performs the functions described herein, and replenishment from base assembly batteries  806  is not available, controller  200  may maintain a reserved energy to operate lift apparatus  14  according to a limp mode or a restricted mode (e.g., only allowing lift apparatus  14  to operate to lower implement assembly  16 ). If energy levels of turntable batteries  802  is decreased further and replenishment from base assembly batteries  806  is still unavailable, functions of lift apparatus  14  may be disabled or limited by controller  200  until energy replenishment is available. Controller  200  can also inhibit power delivery to various linear electric actuators of base assembly  12  (e.g., driving actuators, steering actuators such as steering actuator  722 , axle lock-out actuators) if a battery level (e.g., a state of charge) of base assembly batteries  806  is below a threshold level. 
     During normal base assembly  12  functions such as driving and steering, energy required to activate the various controllable elements of base assembly  12  (e.g., linear electric actuators, electric motors  24 , etc.) may be provided by base assembly batteries  806 . If energy storage of base assembly batteries  806  is low or below a certain level and energy replenishment is not available, controller  200  may disable operations of base assembly  12  until replenishment is available. 
     When lift device  10  is connected to a facility energy source (e.g., an electric outlet or a charging station through receptacle  402 ), charger  808  may charge base assembly batteries  806  using energy provided by the facility energy storage. Concurrently, power inverter  810  may convert DC voltage or DC electrical power of base assembly batteries  806  to AC electrical power with a current sufficiently low to be consumed by slip ring transmission  812 . This AC electrical power can then be transferred to turntable batteries  802  or charger  804  through slip ring transmission  812  for replenishment of turntable batteries  802 . Charger  804  may then charge turntable batteries  802  until both turntable batteries  802  and base assembly batteries  806  achieve 100% state of charge. 
     When lift device  10  is not connected to a facility energy source, turntable batteries  802  may still be replenished or recharged by base assembly batteries  806  as described herein. In some embodiments, controller  200  or a control system of lift device  10  operate split battery system  400  so that turntable batteries  802  are maintained at a 75%-80% state of charge, provided that a charge level of base assembly batteries  806  is 10% or greater. Energy transmission from base assembly batteries  806  to turntable batteries  802  may stop once base assembly batteries  806  fall below a 10% state of charge. 
     Telehandler Modes 
     Referring to  FIGS. 1-3 , implement assembly  16  can interchangeably receive different implements or equipment or can be replaced with different implements. For example, in  FIGS. 2-3 , implement assembly  16  is shown configured with forks  18  so that lift device  10  is configured for material handling (e.g., configured as a material handler). However, implement assembly  16  may be removed and a different implement assembly may be installed (e.g., a platform implement as shown in  FIG. 1 ) to configure lift device  10  for different applications (e.g., a mobile elevating work platform, MEWP). 
     Referring particularly to  FIG. 26 , lift device  10  is shown configured as a MEWP. Specifically, the implement assembly  16  that is positioned at the end of lift apparatus  14  is a platform assembly  90  including a base or a platform  92  and rails  94 . Platform assembly  90  can be raised or lowered to facilitate access to an elevated location  504 . Platform assembly  90  may be configured to support a worker  502 . In some embodiments, when implement assembly  16  is platform assembly  90 , deployable operator station  100  may be transitioned into the tucked or stowed mode or position or state. When implement assembly  16  is platform assembly  90 , worker  502  may operate lift device  10  from platform assembly  90  by operating an HMI that is positioned at platform assembly  90 , or by using a mobile device (e.g., a smartphone) that is wirelessly communicably coupled with controller  200 . Lift device  10  can also be operated from a ground control panel when implement assembly  16  is platform assembly  90  and deployable operator station  100  is tucked or stowed. Platform assembly  90  can include fork pockets that are configured to receive forks  18  therethrough and removably couple platform assembly  90  with forks  18  to transition lift device  10  into a MEWP telehandler. 
     Referring particularly to  FIG. 27 , lift device  10  is shown configured as an MH, when implement assembly  16  includes forks  18  or when platform assembly  90  is removed from forks  18 . Forks  18  can be configured to facilitate removably coupling a pallet, supporting material, etc., so that the material can be placed or removed from elevated location  504 . When lift device  10  is configured as a material handler with forks  18 , lift device  10  may be operated from deployable work station  100 . In particular, when lift device  10  is configured as a material handler, deployable work station  100  may be transitioned into the deployed state, position, or mode, so that an operator  502  can control or operate lift device  10  through various user input devices that are positioned at deployable operator station  100 . 
     Referring again to  FIGS. 2-3 , deployable operator station  100  is shown positioned on a right side  150  of lift device  10 . Deployable operator station  100  may be positioned on the right ride  150  of lift device  10  or may alternatively be positioned on a left side  152  of lift device  10 . In a preferred embodiment, deployable operator station  100  is positioned on the right side  150  of lift device  10  as shown. 
     Referring again to  FIGS. 1-3 , lift device  10  is shown configured as a fully electric telehandler that uses linear electric actuator  52 , linear electric actuator  54 , linear electric actuator  30 , and linear electric actuator  38  to raise or lower implement assembly  16 . However, lift device  10  may similarly be configured as a hydraulic telehandler, with linear electric actuator  52 , linear electric actuator  54 , linear electric actuator  30 , and linear electric actuator  38  being replaced with hydraulic cylinders. In other embodiments, if lift device  10  is a hybrid telehandler, one or more of linear electric actuator  52 , linear electric actuator  54 , linear electric actuator  30 , or linear electric actuator  38  are replaced with hydraulic linear actuators. In still other embodiments, lift device  10  is configured as an electro-hydraulic or a hybrid telehandler. In some embodiments, lift device  10  is configured as a MEWP with a straight lift assembly. When lift device  10  is in the MEWP mode (as shown in  FIG. 4 ) or the MH mode (as shown in  FIG. 5 ), lift device  10  may be configured as a two-wheel steering telehandler so that two of tractive elements  22  (e.g., a front pair or a rear pair) are configured to receive steering inputs and indicate a direction of turn of lift device  10 . In some embodiments, lift device  10  is configured as a four-wheel steering telehandler so that both pairs of tractive elements  22  (e.g., both the front pair and the rear pair) are configured to receive steering inputs to indicate a direction of turn of lift device  10 . In some embodiments, lift device  10  is configured as a two-wheel drive telehandler so that only two of the tractive elements  22  receive rotational kinetic energy (e.g., from electric motor  24 , or each from a corresponding electric motor  24 ) for transporting lift device  10 . In some embodiments, lift device  10  is configured as a four-wheel drive telehandler so that all four of tractive elements  22  receive rotational kinetic energy (e.g., from electric motor  24  or each from a corresponding electric motor  24 ) for transporting lift device  10 . In some embodiments, an electric motor  24  is positioned near each tractive element  22  so that each tractive element  22  can be independently driven by the corresponding electric motor  24 . Electric motor  24  may be a high-speed, high-efficiency electric motor (e.g., an electric motor with a highest efficiency at a desired driving or transportation speed). 
     Steering System 
     Referring now to  FIGS. 29-33 , steering system  700  is shown in greater detail, according to an exemplary embodiment. Steering system  700  is configured to pivot tractive elements  22  to perform a turn. Steering system  700  includes one or more frame members, control arm assemblies, hub assemblies, knuckles, etc., shown as steering knuckle  706 . Any of the frame members (e.g., laterally extending frame members  702 / 704 ) may be components or portions of frame  20 . Tractive elements  22  are rotatably coupled with steering knuckle  706 . Tractive elements  22  are configured to rotate relative to steering knuckle  706  about axis  790 . Tractive elements  22  can frictionally interface with a ground surface and thereby drive lift device  10  as they are driven to rotate by electric motors  24 . 
     Steering knuckle  706  is configured to rotate/pivot relative to laterally extending frame members  702 / 704  about axis  720  to facilitate steering of lift device  10 . Steering knuckle  706  can rotatably couple with laterally extending frame members  702 / 704  with a bearing. Electric motor  24  can be configured to pivot with steering knuckle  706  as steering knuckle  706  rotates about axis  720 . Steering knuckle  706  is driven to pivot about axis  720  by a tie rod, a control arm, a rigid member, etc., shown as steering member  792 . Steering member  792  includes a first arcuate member  708   a  and a second arcuate member  708   b  (e.g., curved members, bowed members, arching members, etc.). Arcuate members  708  can have a generally arcuate shape, a curved shape, a constant-radius curved shape, a non-constant radius curved shape, an angled shape (e.g., two straight or curved portions angularly offset), etc. Steering member  792  is configured to pivotally couple with a connecting portion  712  of steering knuckle  706  about axis  711 . Steering member  792  can be coupled with an elongated member, a cylinder, a pin, a rod, etc., shown as pin  714  that extends between first arcuate member  708   a  and second arcuate member  708   b  through a corresponding aperture of connecting portion  712 . In some embodiments, pin  714  is fixedly coupled with arcuate members  708  and is rotatably coupled with an aperture/bore of steering knuckle  706 . In other embodiments, pin  714  is fixedly coupled with steering knuckle  706  and is rotatably coupled with apertures/bores of arcuate members  708 . First arcuate member  708   a  and second arcuate member  708   b  each include a connecting end  796 , respectively. Connecting end  796  can include an aperture, bore, hole, etc., that extends therethrough and is configured to couple with pin  714 . In some embodiments, a bearing (e.g., a sleeve bearing, a ball bearing, etc.) is disposed in the aperture of connecting portion  712  and is configured to couple with pin  714  that extends between first arcuate member  708   a  and second arcuate member  708   b . The pivotal/rotatable interface between steering knuckle  706  and first and second arcuate members  708   a  and  708   b  facilitates relative rotation between steering knuckle  706  and steering member  792  about axis  711 . 
     Electric motor  24  is configured to drive tractive element  22 . Electric motor  24  can be mounted between laterally extending frame member  702  and laterally extending frame member  704 . Laterally extending frame members  702 / 704  are end portions of one of (e.g., a front, a rear) lateral frame member  710 . Lateral frame member  710  can extend along substantially an entire lateral width of lift device  10 . Lateral frame member  710  provide structural support between tractive elements  22  and base assembly  12 . Lateral frame member  710  extends along a lateral axis  780  of lift device  10 . 
     Steering member  792  has a generally arcuate shape and extends between electric actuator  722  (e.g., an electric linear actuator, a linear electric steering actuator, etc.) and steering knuckle  706 . Steering member  792  is configured to couple with a rod, a cylinder, an extension member, a push rod, etc., of electric actuator  722 , shown as rod  726 . Steering member  792  can be fixedly coupled with an end portion, a connecting portion, a clevis, an attachment portion, etc., of rod  726 , shown as end portion  730 . Rod  726  is configured to extend and retract relative to a body, a housing, a frame, a main member, an outer member, etc., of electric actuator  722 , shown as body  724 . Rod  726  can be received therewithin body  724  of electric actuator  722  and driven to extend and retract by electric motor  732 . Electric motor  732  may be configured to interface with a gear that drives a drive nut (not shown). The drive nut may drive rod  726  to extend or retract. 
     End portion  730  of rod  726  is configured to be received therebetween first arcuate member  708   a  and second arcuate member  708   b . First arcuate member  708   a  and second arcuate member  708   b  can be substantially parallel to each other and extend outwards between electric actuator  722  and tractive element  22 . End portion  730  can be fixedly coupled with first arcuate member  708   a  and second arcuate member  708   b . In some embodiments, end portion  730  is fixedly coupled with first arcuate member  708   a  and second arcuate member  708   b  with fasteners  728  (e.g., bolts, rivets, screws, etc.) that extend therethrough. In some embodiments, two or more fasteners  728  are used to fixedly couple end portion  730  of rod  726  with steering member  792  (i.e., with first arcuate member  708   a  and second arcuate member  708   b ). In other embodiments, end portion  730  of rod  726  and steering member  792  are integrally formed, welded, etc., or otherwise fixedly attached. 
     The fixed connection between end portion  730  of rod  726  and steering member  792  prevents rotation between rod  726  and steering member  792 . Advantageously, this facilitates reducing transverse loads being applied to electric actuator  722 . This can reduce the likelihood of any of the internal components of electric actuator  722  failing due to excessive transverse loads/forces. 
     Electric actuator  722  is configured to pivotally couple with longitudinally extending frame members  742 . Longitudinally extending frame members  742  extend longitudinally outwards from lateral frame member  710 . Longitudinally extending frame members  742  can extend from a centerpoint of lateral frame member  710 . Longitudinally extending frame members  742  can extend outwards (e.g., in forwards direction  750 ) from lateral frame member  710 . Longitudinally extending frame members  742  can be removably coupled with lateral frame member  710  (e.g., with fasteners), integrally formed with lateral frame member  710 , or otherwise connected/coupled with lateral frame member  710 . Electric actuator  722  is disposed between longitudinally extending frame member  742   a  and longitudinally extending frame member  742   b . Body  724  of electric actuator  722  can be positioned between longitudinally extending frame member  742   a  and longitudinally extending frame member  742   b.    
     A pin  798  may extend at least partially (or entirely) through an aperture of electric actuator  722  and corresponding apertures of longitudinally extending frame members  742 . Electric actuator  722  is configured to pivot, swivel, rotate, etc., about axis  776  relative to longitudinally extending frame members  742 . As electric actuator  722  extends and retracts, electric actuator  722  may pivot about axis  776  in either direction. Axis  776  can be defined as extending through pin  798 . Pin  798  can be fixedly coupled with electric actuator  722  and configured to rotatably couple with bearings, mounting members, rotatable coupling members, etc., shown as coupling members  740 . Coupling members  740  can be disposed on outer sides of longitudinally extending frame members  742 . For example, coupling member  740   a  may be disposed on an upper or outer surface of longitudinally extending frame member  742   a , while coupling member  740   b  is disposed on a bottom or outer surface of longitudinally extending frame member  742   b . Pin  798  can be slidably coupled with an aperture, bore, hole, etc., of body  724  of electric actuator  722 . In other embodiments, pin  798  is fixedly coupled with the bore of body  724 . In still other embodiments, pin  798  is slip fit with an inner surface of the bore of body  724 . Pin  798  can be rotatably coupled with coupling members  740 . Coupling members  740  can each include a bearing (e.g., a ball bearing, a roller bearing, a sleeve bearing, etc.) configured to couple with pin  798 . Coupling members  740  can be coupled with longitudinally extending frame members  742 . 
     Longitudinally extending frame member  742   a  and longitudinally extending frame member  742   b  can be substantially parallel to each other and define a receiving area therebetween. The receiving area is configured to receive body  724  of electric actuator  722  therebetween. Pin  798  may extend through at least a portion or substantially an entirety of the receiving area defined between longitudinally extending frame member  742   a  and longitudinally extending frame member  742   b.    
     As electric actuator  722  extends (e.g., rod  726  extends relative to body  724 ), electric actuator  722  may rotate about axis  776 . Likewise, steering knuckle  706  and steering member  792  rotate relative to each other about axis  711 . Similarly, when electric actuator  722  retracts (e.g., rod  726  retracts relative to body  724 ), electric actuator  722  may rotate about axis  776  and steering knuckle  706  and steering member  792  rotate relative to each other about central axis  711 . In this way, extension and retraction of electric actuator  722  can drive the rotation/pivoting of steering knuckle  706  about axis  720  to turn tractive element  22 . Electric actuator  722  can receive power for extending and retracting from electrical storage device(s)  40 . Electric actuator  722  can receive control signals that indicate a degree of extension or retraction (and thereby indicate a degree of turn of tractive elements  22 ) from controller  200 . Controller  200  may provide electric actuator  722  with the control signals that indicate the degree of extension or retraction in response to receiving a user input from HMI  500 , or any other user input device of lift device  10 . Controller  200  operates electric actuator  722  to extend or retract to indicate a direction of turn of lift device  10 . 
     Electric motors  24  can also receive power from energy storage devices  40  to drive tractive elements  22 . Electric motors  24  can receive a control signal from controller  200  to operate (e.g., a desired speed). 
     Arcuate members  708  have a curved shape such that when tractive elements  22  are pivoted to their angular extremes (e.g., a sharpest turn possible, when electric actuator  722  is fully extended, etc.), steering member  792  does not contact electric motors  24 . This facilitates sharper turns of lift device  10  without steering member  792  contacting electric motors  24 . 
     Referring particularly to  FIG. 30 , lift device  10  can include a shield, a guard, a planar member, etc., shown as guard member  731 . Guard member  731  can protrude outwards from lift device  10  in a direction of travel of lift device  10 . Guard member  731  provides a barrier for objects in front of lift device  10  such that electric actuator  722  does not contact the objects as lift device  10  is driven. Lift device  10  can include a front guard member  731  and a rear guard member  731  disposed at opposite ends of lift device  10 . Guard members  731  can protrude outwards along longitudinal axis  778  in either forwards direction  750  or rearwards direction. For example, a front guard member  731  may protrude outwards in forwards direction  750  from a front of base assembly  12 . Likewise, a rear guard member  731  may protrude in rearwards direction from a rear of base assembly  12 . 
     It should be noted that while only one tractive element  22  is shown pivoted/rotated by steering system  700 , any or all of tractive elements  82  of lift device  10  can be similarly configured. For example, steering system  700  can include a similar and symmetric electric actuator  722  at an opposite side (e.g., a right/left side) of base assembly  12  that steers tractive element  22  at the opposite side. In some embodiments, steering system  700  is positioned on an outwards facing side of lateral members  710  (e.g., a forwards facing side of a front lateral frame member  710 , a rearwards facing side of a rear lateral frame member  710 ). In other embodiments, steering system  700  is positioned in an inwards facing side of lateral members  710  (e.g., an inwards facing side of a front lateral frame member  710 , a front facing side of a rear lateral frame member  710 ). 
     Control Systems 
     Referring particularly to  FIG. 10 , a control system  1000  for lift device  10  includes controller  200 , turntable batteries  802 , charger  804 , a battery sensor  1004 , slip ring transmission  812 , power inverter  810 , base assembly batteries  806 , a battery sensor  1002 , charger  808 , base assembly  12 , and lift apparatus  14 . Controller  200  can represent any of or a combination of base control module  412 , turntable control module  428 , traction controllers  414 , steering controllers  416 , base assembly controller  820 , base battery management system  834 , turntable battery management system  840 , or turntable master controller  842 , etc. Any of the functionality of base control module  412 , turntable control module  428 , traction controllers  414 , steering controllers  416 , base assembly controller  820 , base battery management system  834 , turntable battery management system  840 , or turntable master controller  842  may be performed by controller  200 . In some embodiments, any of the functionality of controller  200  as described herein is distributed across or performed by a combination of base control module  412 , turntable control module  428 , traction controllers  414 , steering controllers  416 , base assembly controller  820 , base battery management system  834 , turntable battery management system  840 , or turntable master controller  842 . 
     Controller  200  includes a processing circuit  202 , a processor  204 , and memory  206 . Processing circuit  202  can be communicably connected to a communications interface such that processing circuit  202  and the various components thereof can send and receive data via the communications interface. Processor  204  can be implemented as a general purpose processor, an application specific integrated circuit (ASIC), one or more field programmable gate arrays (FPGAs), a group of processing components, or other suitable electronic processing components. 
     Memory  206  (e.g., memory, memory unit, storage device, etc.) can include one or more devices (e.g., RAM, ROM, Flash memory, hard disk storage, etc.) for storing data and/or computer code for completing or facilitating the various processes, layers and modules described in the present application. Memory  206  can be or include volatile memory or non-volatile memory. Memory  206  can include database components, object code components, script components, or any other type of information structure for supporting the various activities and information structures described in the present application. According to some embodiments, memory  206  is communicably connected to processor  204  via processing circuit  202  and includes computer code for executing (e.g., by processing circuit  202  and/or processor  204 ) one or more processes described herein. 
     Controller  200  is configured to generate control signals for base assembly  12  and/or lift apparatus  14  to perform a requested function as input by a user input device  1006 . For example the user input device  1006  may be any buttons, levers, human machine interfaces, touchscreens, steering wheels, etc., that a user or operator of lift device  10  can provide the user input through. Controller  200  can receive the user input and generate control signals for base assembly  12 , lift apparatus  14  or the various controllable elements (e.g., electric actuators, linear electric actuators, electric motors, etc.) to perform the requested function of base assembly  12  or lift apparatus  14  (e.g., steering operations, driving operations, lifting operations, turntable operations, etc.). 
     Controller  200  may receive sensor feedback from any of the systems, subsystems, electrical devices, etc., described herein through one or more sensors. Controller  200  receives a battery level of turntable batteries  802  from battery sensor  1004  and a battery level of base assembly batteries  806  from battery sensor  1002 . Controller  200  may also generate and provide control signals for charger  808 , power inverter  810 , slip ring transmission  812 , or charger  804  to perform recharging operations as described in greater detail above. 
     Charger  808  may be connected to a facility power source and can provide charging power to base assembly batteries  806 . Controller  200  may monitor the battery level of base assembly batteries  806  and operate charger  808  to charge base assembly batteries  806  to achieve a desired level of charge. Base assembly batteries  806  can provide power to base assembly  12  or to the various electrical components of base assembly  12  so that the electrical components of base assembly  12  can operate to perform their respective functions (e.g., driving and steering functions). In some embodiments, base assembly batteries  806  provide electrical power (e.g., AC power) to base assembly  12  or the various electrical components thereof through power inverter  810 . 
     Base assembly batteries  806  can provide DC power to power inverter  810 . Power inverter  810  can provide AC power to slip ring transmission  812  so that the AC power (e.g., as supplied by charger  808  or from the facility power source) can be provided to turntable batteries  802  to recharge turntable batteries  802  (e.g., through charger  804 ). Controller  200  may generate control signals for charger  804  and/or slip ring transmission  812  to transfer the power from power inverter  810  to turntable batteries  802  to recharge turntable batteries  802 . In some embodiments, controller  200  receives the battery level of turntable batteries  802  from battery sensor  1004  and operates charger  804 , slip ring transmission  812 , and power inverter  810  to charge turntable batteries  802  until turntable batteries  802  achieve at least a minimum level of charge. Controller  200  can also generate control signals for slip ring transmission  812  to rotate turntable assembly  800  relative to base assembly  12  as requested by the user input (e.g., to perform turntable operations). 
     It should be understood that controller  200  can be configured to operate charger  808 , power inverter  810 , slip ring transmission  812 , and charger  804  to replenish or recharge turntable batteries  802  when charger  808  is connected to facility power or when charger  808  is not connected to facility power. For example, if controller  200  detects that the battery level as obtained by battery sensor  1004  is below a threshold level, controller  200  may operate charger  808 , power inverter  810 , slip ring transmission  812 , and charger  804  to replenish turntable batteries  802  using energy provided by base assembly batteries  806 . 
     Controller  200  can also restrict operation of base assembly  12  and/or lift apparatus  14  based on a connection status of charger  808  to facility power, the battery level of turntable batteries  802 , and the battery level of base assembly batteries  806 . For example, if controller  200  detects that turntable batteries  802  have a battery level that is below a first threshold, controller  200  may restrict operation of lift apparatus  14  to raise implement assembly  16  until turntable batteries  802  are replenished. Controller  200  may replenish turntable batteries  802  using the recharge or replenishing techniques described herein if the battery level of base assembly batteries  806  is sufficient to recharge or replenish turntable batteries  802  and/or if charger  808  is connected to facility power. If the battery level of turntable batteries  802  decreases below a second threshold level and controller  200  determines that charger  808  is still not connected to facility power and that base assembly batteries  806  do not have a sufficient battery level to replenish turntable batteries  802 , controller  200  may restrict operation of base assembly  12  until charger is connected to facility power and may operate a display device or a notification system of lift device  10  to prompt the operator to connect charger  808  to facility power for recharge. Controller  200  may similarly restrict operation of base assembly  12  using the battery level of base assembly batteries  806 . Controller  200  may also shut off power to lift device  10  (e.g., to base assembly  12  and/or lift apparatus  14  and/or turntable assembly  800 ) in response to detecting a period of user inactivity to maintain or preserve state of charge of base assembly batteries  806  and/or turntable batteries  802 . 
     Referring particularly to  FIG. 25 , a control system  1800  for lift device  10  includes controller  200 , input devices  1802 , and controllable elements  1804 . In some embodiments, input devices  1802  includes, but is not limited to, switch  186 , button  184 , joystick  188 , HMI  500 , joystick  190 , and lever twist input device  194 . Likewise, controllable elements  1804  can include, but is not limited to, linear electric actuator  38 , linear electric actuator  52 , linear electric actuator  30 , linear electric actuator  54 , linear electric actuator  42 , linear electric actuator  164 , linear electric actuator  302 , and electric motor  24 . Controller  200  is configured to receive various input signals from the input devices  1802  and generate control signals for any of the controllable elements  1804  of lift device  10 . 
     In some embodiments, controller  200  is wirelessly communicably coupled with a remote user device  208 . Controller  200  can receive a user input or a request to deploy deployable operator station  100  from the remote user device  208 . In response to receiving the user input, controller  200  can generate control signals for the various controllable elements  1804  to deploy deployable operator station  100 . Advantageously, remote user device  208  and controller  200  can facilitate initiating deployment of deployable operator station  100  before the user or operator is at lift device  10  (e.g., is a distance away from lift device  10 ). 
     Controller  200  can also be configured to restrict, prevent, or inhibit one or more functions of lift device  10  in response to receiving an indication from an operator sensor  210  that an operator is not present at deployable operator station  100 . Operator sensor  210  can be a camera, a distance or proximity sensor, a motion detector, a temperature sensor, a weight sensor, an accelerometer, etc., or any other sensor that can detect a presence of an operator at deployable operator station  100 . In some examples, the controller  200  can function as a key that can be used to activate one or more electric motors within the lift device  10 . In some examples, and as shown in  FIG. 41 , a docking station  125  is positioned within the operator station  100 . To activate the lift device  10 , a user can first dock the remote and mobile controller  200  onto the docking station  125 . Coupling the hand-held controller  200  to the docking station  125  can create a wired or otherwise reliable connection with the controller  200  to execute and communicate commands to the various systems throughout the lift device  10 . When the operator is done operating the machine, the operator can remove the hand-held controller  200 . The hand-held controller  200  can then be individually charged off-site, for example, to limit the current draw form the electrical energy storage devices  40  positioned onboard the lift device  10 . By removing the hand-held controller  200  from the operator station  100 , an operator can effectively remove the entire operating system of the lift device  10 , which further prohibits unauthorized use of the lift device  10 . Additional display elements can be provided to incorporate feedback from cameras positioned about the base assembly  12  of the lift device  10 . The display elements can provide diagnostic or operational information that can help an operator within the operator station  100  to perform a desired task with the lift device  10 . 
     Referring particularly to  FIG. 28 , another control system  600  for lift device  10  includes controller  200 , input devices  602 , and controllable elements  604 . Control system  600  can be the same as or similar to control system  1000 . For example, control system  600  can include any of the input devices  1802  as shown in  FIG. 25 . In some embodiments, input devices  602  includes, but is not limited to, operator station input devices  602   a  and platform input devices  602   b . Likewise, controllable elements  604  can include, but are not limited to, linear electric actuator  38 , linear electric actuator  52 , linear electric actuator  30 , linear electric actuator  54 , linear electric actuator  42 , electric motor(s)  24 , electric actuator  722 , turntable motor  64 , and/or a station actuator  606  that is configured to operate to at least partially deploy deployable operator station  100 . Controller  200  is configured to receive various input signals from the input devices  602  and generate control signals for any of the controllable elements  604  of lift device  10 . 
     In some embodiments, controller  200  is wirelessly communicably coupled with a remote user device  208 . Controller  200  can receive a user input or a request to deploy deployable operator station  100  from the remote user device  208 . In response to receiving the user input, controller  200  can generate control signals for the various controllable elements  604  (e.g., station actuator  606 ) to deploy deployable operator station  100 . Advantageously, remote user device  208  and controller  200  can facilitate initiating deployment of deployable operator station  100  before the user or operator is at lift device  10  (e.g., is a distance away from lift device  10 ). In some embodiments, controller  200  is configured to receive input signals from remote user device  208  to operate lift device  10  (e.g., to drive or steer lift device  10 ). For example, if lift device  10  is configured as a MEWP, the operator may operate lift device  10  (e.g., to operate lift apparatus  14 , steering system  700 , driving operations, steering operations, turntable assembly  800 , etc.) from platform assembly  90  using remote user device  208 . The operator can also control lift device  10  through remote user device  208  when the operator is off-boarded and boarded onto the platform assembly  90 . When lift device  10  is in the MEWP mode, the operator can control or operate lift device  10  through ground control and/or work platform control. 
     Referring still to  FIG. 28 , controllable elements  604  are shown consuming or receiving electrical energy from energy storage devices  40 . Energy storage devices  40  can use split-battery technology or techniques to ensure continuous rotation of turntable assembly  800  and to facilitate extended battery life or improved energy consumption efficiency of controllable elements  604 . 
     Controller  200  can operate controllable elements  604  according to various modes. For example, controller  200  may operate lift device  10  in a MEWP mode and an MH mode. When lift device  10  is configured as a MEWP, controller  200  may operate electric motor(s)  24  so that functional performance and load carrying capacities are maintained equivalent or above a traditional MEWP that is not transformable into an MH. In the MEWP mode, controller  200  may allow lift speeds that are typical for traditional MEWPs. However, controller  200  may operate electric motors  24  so that lift device  10  can travel or transport at a speed that is twice as fast as traditional MEWPs. In some embodiments, controller  200  maintains deployable operator station in the deployed state or position when lift device  10  is in the MEWP mode. 
     Controller  200  may also transition lift device  10  into the MH mode after platform assembly  90  has been replaced with forks  18 , a material handling assembly, a glass holder, a platform configured to support materials or additional loads, etc., or any other implement. Controller  200  may operate controllable elements  604  to deploy deployable operator station  100  for the MH mode. In this way, an operator may sit at deployable operator station  100  and operate lift device  10 . In some embodiments, a drive speed that lift device  10  can achieve when in the MH mode is 2-3 times greater than a maximum speed that lift device  10  can achieve when in the MEWP mode. When controller  200  operates lift device  10  according to the MH mode, a lift speed of lift apparatus  14  may be the same as or similar to a lift speed of a traditional material handler. Advantageously, lift device  10  may have a load bearing capability when in the MH mode that is greater than a traditional MH. Advantageously, deployable operator station  100  can be deployed or tucked/stowed to facilitate improved visibility. Additionally, deployable operator station  100  may provide additional or improved visibility compared to other telehandlers that use traditional cabs. 
     Controller  200  can also be configured to restrict, prevent, or inhibit one or more functions of lift device  10  in response to receiving an indication from an operator sensor  210  that an operator is not present at deployable operator station  100 . As shown in  FIG. 2 , operator sensor  210  may be positioned at deployable operator station  100  (e.g., at seat  124 ). Operator sensor  210  can be a camera, a distance or proximity sensor, a motion detector, a temperature sensor, a weight sensor, an accelerometer, etc., or any other sensor that can detect a presence of an operator at deployable operator station  100 . 
     Referring to  FIGS. 10, 25, and 28 , any of the control systems  1000 ,  1800 , or  600  that can be implemented on the lift device  10  may include a movable control box  1008 . The movable control box  1008  can be a component of the lift device  10 . The movable control box  1008  can be configured to wirelessly or wiredly communicably couple with the controller  200 . For example, the movable control box  1008  can be communicably coupled with the controller  200  via a wire or a plug at either the deployable operator station  800  (e.g., at the HMI  500 ), a fixed operator station of the lift device  10 , the platform assembly  90 , the implement assembly  16 , etc. The movable control box  1008  can be removed and wiredly de-coupled from its plug, and moved to another location on the lift device  10  where it can be communicably coupled with a different plug. For example, the movable control box  1008  can be wiredly coupled with a plug or a quick disconnect at the deployable operator station  800  or at the implement assembly  16  (e.g., if the implement assembly  16  is provided as the platform assembly  90 ). 
     The movable control box  1008  can include various switches, buttons, levers, joysticks, etc., to facilitate providing a user input to controller  200 . The movable control box  1008  can provide the user input to controller  200  to operate the lift device  10  (e.g., to drive or steer the lift device  10  or to operate the lift apparatus  14 ). The platform assembly  90  or the operator station  800  can include a receptacle for storing the movable control box  1008 . For example, the deployable operator station  800  can include a receptacle for storage of the movable control box  1008  (or other storage) so that the movable control box  1008  can be protected and secured when the deployable operator station  800  is transitioned into the tucked or stowed position. 
     Advanced Worksite Control 
     Referring to  FIGS. 46-58 , the lift device  10  can be used to perform various different types of tasks at a jobsite  2000 , including both autonomous, semi-autonomous, and manual tasks that can be performed by an operator while being both physically within the lift device  10  or remote. The jobsite  2000  can include a variety of different equipment, including lift devices  10  and other MEWPs and material handling vehicles  2002  that can be remotely monitored and controlled using a series of cameras and controllers positioned throughout the jobsite  2000 . The cameras can be positioned on the lift devices  10 , MEWPs, material handling vehicles  2002 , and one or more drones  2004  that can monitor the jobsite  2000  from the air. The various vehicles and devices at the jobsite  2000  can be centrally controlled or monitored by a mobile device (e.g., a phone, tablet, computer, etc.). In some examples, several mobile devices can monitor and/or control different equipment at the jobsite  2000  simultaneously, using camera footage from different cameras on the jobsite and operational information received from equipment or the drones  2004 . In some examples, the various cameras positioned throughout the worksite can record activity on the jobsite  2000 . In some examples, the drones  2004  and/or other equipment can monitor environmental characteristics, such as noise and pollution, which are present at the jobsite  2000 . 
     Referring now to  FIGS. 47-49 , an operator is depicted remotely controlling a material handling vehicle  2002  using a controller  2006 . The various equipment throughout the jobsite  2000  can be monitored and/or controlled using the controller  2006 , which can be a part of or incorporated into a handheld mobile device  2008  (e.g., a phone, a tablet, laptop, etc.). In some examples, and as depicted in  FIG. 48-49 , the mobile device  2008  includes a graphical user interface (GUI)  2010  that can display a variety of different data sets relating to the jobsite  2000 . The data sets can include machine performance or health status, for example, and can also include real-time data feeds (performance parameters, camera views, etc.) from one or more lift devices  10 , MEWPs  2002 , or drones  2004  positioned throughout the jobsite  2000 . 
     In some examples, the controller  2006  can be used to adjust a status of the one or more lift devices  10 , MEWPs  2002 , or drones  2004  on the jobsite  2000 . For example, and as depicted in  FIG. 48 , the controller  2006  can be used to toggle through various different operational modes of the equipment at the jobsite  2000 . In some embodiments, the different operational modes can include an autonomy level. Using the controller  2006 , a user can transition a piece of equipment at the jobsite  2000  between a manual mode of operation (e.g., where someone provides driving and lifting instructions while physically present within the device), a remote manual mode of operation (e.g., where an operator provides driving and lifting instructions remotely, through the controller  2006  or other system), a semi-autonomous mode of operation (where a user controls vehicle travel but the implement assembly works autonomously), and a fully autonomous mode of operation. In some examples, the instructions to the equipment when the equipment is in the remote manual mode and/or the semi-autonomous modes of operation can be provided wirelessly using the controller  2006 . Accordingly, an operator can control the position and/operation of a piece of equipment using the controller  2006 , without needing to be physically present within the lift device  10 , MEWP  2002 , or drone  2004 . In still other examples, the controller  2006  acts as a key that can unlock the equipment to travel in the manual mode of operation when the equipment detects the controller is physically present within the deployable operator station  100 . 
     The different operational modes available for selection by the user can also be defined by desired tasks for the lift device  10 , MEWPs  2002 , or drones  2004 , or other equipment types to perform. For example, an operator can select the lift device  10 , which can provide a number of available tasks and/or modes that can be accomplished by the lift device  10 . In some examples, the different modes can include a material handling mode and an aerial work platform (AWP) mode. Depending on the selection of mode made by the user (e.g., using the controller  2006  and/or GUI  2010 ), the lift device  10  can determine whether it first needs to reconfigure its implement assembly  16 . If the material handling mode is selected, the lift device  10  (e.g., using the controller  200 ) or the controller  2006  will first determine whether the appropriate implement is currently coupled to the lift apparatus  14 . If the lift device  10  or controller  2006  detects that a platform assembly  90  is coupled to the lift apparatus  14  (as opposed to forks  18 , for example), the lift device  10  can first travel to a nearby location to execute an implement changing operation. The platform assembly  90  can be decoupled from the lift apparatus  14  and the forks  18  can be engaged by the lift apparatus  14 . With the forks  18  attached to the lift device  10 , the material handling mode can be achieved. Conversely, if the AWP mode is selected, the lift device  10  and/or the controller  2006  will determine whether a suitable platform assembly  90  is coupled to the lift apparatus  14 , and execute a change operation automatically if needed to transition from the material handling mode back to the AWP mode. 
     As depicted in  FIGS. 48-49 , the GUI  2010  on the mobile device  2008  can include a split configuration that provides real-time media (e.g., images, video, etc.) taken from one or more cameras positioned on the equipment, as well as controls that can be used to direct and/or drive the lift device  10  or other equipment. In some examples, the GUI  2010  is configured to provide a forward facing view  2012  from a camera positioned on the lift device  10 , as well as one or more virtual joysticks  2014  or pads that can allow an operator to execute different driving, steering, lifting, or tilting operations. Accordingly, the operator can control both the primary mover and the lift apparatus  14  using the mobile device  2008  and GUI  2010 . In some examples, the GUI  2010  further includes a mode selection actuator  2016  as well. Tapping the mode selection actuator  2016  can toggle the lift device  10  (or other selected equipment) through various operational modes, as discussed above. 
     Referring to  FIG. 50 , the various equipment, including the lift device(s)  10  and MEWPs  2002  at the jobsite  2000  can be electrically powered. Accordingly, over time, the energy storage devices  40  on the various equipment will expend energy and need to be recharged. The jobsite  2000  can include a charging station  2018  that can enable quick and autonomous recharging of the various equipment. The charging station  2018  includes several solar panels  2020  that can be configured to harvest and store energy from sunlight. The harvested energy can be transmitted to the lift device(s)  10  or MEWPs  2002  positioned below or near the charging station  2018  through wired or wireless connections. In some examples, the charging station  2018  includes one or more charging cords  2022  that can be plugged into a piece of equipment to begin the charging operation. An operator can be assigned to the charging station so that the physical plug-in process can be executed to couple the equipment to the charging station  2018  using the cord  2022 . 
     Referring to  FIGS. 51-52 and 55-57 , the lift device  10  and/or the MEWPs  2002  can be arranged to perform tasks using target-style projections to direct the lift device  10  and/or MEWPs  2002  about the jobsite  2000 . In some examples, a mobile device (e.g., the mobile device  2008  or another mobile device) can be used to provide a target projection  2024  onto an area, such as an elevated surface. The mobile device projects the target  2024  onto a surface, which can then be identified and used by the controller  200  of the lift device  10  to position the implement assembly  16  until it reaches the projected target  2024 . In some examples, the drone  2004  can supply the target projection  2024 . Accordingly, an operator can use the controller  2006  to select a target area. With target selected, the drone  2004  can fly toward the target area, then project the target  2024  onto the selected area below. The controller  200  can then position the lift device  10  so that the implement assembly  16  is within the projected target  2024 . Once the implement assembly  16  reaches the target area  2024  (which can be done using sensor feedback, optical sensors, etc.), the implement assembly  16  can then offload materials or maintain an operator at the target location until the task is completed, as depicted in  FIG. 52 . In some examples, and as depicted in  FIG. 57 , the drone  2004  further includes a camera to monitor the lift device  10  as the load on the implement assembly  16  is moved toward the target  2024 . 
     With reference to  FIGS. 53-54 , the controller  2006  and/or drones  2004  can be used to execute tool or equipment delivery operations. Using a phone or other mobile device (e.g., the mobile device  2008 ), a worker on the lift device  10  or MEWP  2002  can select from a catalog of different tools that may be needed to perform a task while elevated on the work platform assembly  90 . The worker can scroll through a library of different available tools, which can then be selected on the mobile device. Upon receiving a communication that one or more of the tools has been selected by the worker, the drone  2004  receives instructions (e.g., from the central controller  2006 ) to retrieve the selected tool and bring the selected tool to the worker at the location where the tool was requested. 
     Referring now to  FIGS. 58-59 , the lift device  10  is depicted with different robotic implement assemblies  2030 ,  2032  that can be used to perform a variety of different tasks at elevation. The robotic implement assemblies  2030 ,  2032  can include, among other things, one or more articulating fingers  2034  that can be manipulated to perform a variety of tasks, including positioning materials. The robotic implement assemblies  2030 ,  2032  have multi-axis positioning, which allows materials to be manipulated and positioned into desired locations, which can be particularly useful during construction processes. For example, a first lift device  10   a  can be used as a positioner while a second lift device  10   b  can be used as a welder. The positioner can include a three-fingered assembly  2036 . The three-fingered assembly  2036  can include one or more material interfaces  2038  positioned at a distal end of each finger  2034 . In some examples, the material interfaces  2038  are vacuum chambers that can create low pressure suction sufficient to selectively couple materials to the robotic implement assembly  2030 . The suction force created can allow for the robotic implement assembly  2030  to raise and suspend heavy materials off the ground so that different tasks (e.g., welding, fastening, etc.) can be performed. Once the materials have been properly positioned and/or coupled to a desired location, the vacuum can be released, which decouples the robotic implement assembly  2030  from the material. Various other types of material interfaces  2038  can be used as well, including movable jaws that can grab and secure an item. In some examples, the fingers  2034  of the three fingered assembly  2036  are configured to extend and retract, which can allow the three-fingered assembly  2036  to accommodate objects of different sizes. 
     The robotic implement assembly  2032  is configured as a welder, and includes a welding stick  2040  positioned at its distal end. The implement assembly  2032  once again is configured with an articulating finger  2034  that is configured to move about multiple axes to perform a weld. In some examples, the implement assembly  2032  includes a self-contained weld wire supply that is fed through a supply tube  2042  within the implement assembly  2032 . The position of the welding stick  2040  can be controlled by both the robotic implement assembly  2032  and the lift apparatus  14 , simultaneously. In some examples, the controller  200  is configured to execute the welding operation. The robotic implement assemblies  2030 ,  2032  can be interchangeable, such that the first lift device  10   a  can also be a welder if a different robotic implement assembly  2032  is attached. 
     As depicted in  FIG. 58 , the lift devices  10   a ,  10   b  and implement assemblies  2030 ,  2032  can also be remotely controlled to perform various tasks. For example, using the mobile device  2008  (which can include the controller  2006 ), an operator can direct the one or more lift devices  10   a ,  10   b  without needing to be physically present within either lift device  10   a ,  10   b . Cameras can be mounted to one or both of the implement assemblies  2030 ,  2032  to monitor and provide real-time feedback for the processes being performed by the implement assemblies  2030 ,  2032 . If the lift devices  10   a ,  10   b  are in a fully autonomous mode, the mobile device  2008  can be used as a mechanism to monitor progress of the operations. The mobile device  2008  can be used to enter different parameters that can be performed by the robotic implement assemblies  2030 ,  2032 . For example, the operator can enter a specific weld size call out that is to be performed automatically by the robotic implement assembly  2032 . In some examples, the mobile device  2008  and controller  2006  generally can be used to control the robotic implement assemblies  2030 ,  2032  from the ground below. Using the GUI  2010  and virtual joysticks  2014 , the operator can direct the robotic articulating fingers  2034  of each of the implement assemblies  2030 ,  2032  to perform different tasks (e.g., positioning, welding, etc.) at elevation. Using a camera feed and semi-autonomous or fully autonomous control, a worker can perform tasks that might otherwise be difficult to accomplish without leaving the ground below. In some examples, additional cameras mounted to the drones  2004  or other locations in the jobsite  2000  can be accessed by the mobile device  2008  to provide additional angles and views that can help the implement assemblies  2030 ,  2032  perform desired tasks. The GUI  2010  and/or mobile device  2008  communicates with and can provide partial or total control of these remote and autonomous, semi-autonomous, or automatic robotic implement assemblies  2030 ,  2032  so that tasks can be completed. Although described as a mobile device  2008 , various tasks can also be assigned to or otherwise instructed by a central computer system present at the jobsite  2000  or communicably coupled to the various devices at the jobsite  2000  over the internet or other communication protocol. The robotic implement assemblies  2030 ,  2032  are configured to communicate with the controller  200  either wirelessly or through a wired connection established through the lift apparatus  14 . In some examples, the robotic implement assemblies  2030 ,  2032  include wireless transceivers that are configured to receive commands from the controller  2006  through the controller  200 , which can provide bi-directional data flow. Although shown as a position and a welder, various types of robotic implement assemblies  2030 ,  2032  can be used. For example, jackhammer attachments, nail-gun attachments, and the like can be used. In some examples, the robotic implement assembly can include or can be in communication with a pressurized water source and can be used to implement a window-washing process. In still other examples, the robotic implement assembly can be configured as a paint spray nozzle. In each example, the implement assemblies can be configured to operate automatically or autonomously, or can be configured to operate in accordance with control commands received from a remote controller  2006  (through the mobile device  2008 , for example), which can at least partially eliminate the need to have a worker positioned at elevation to perform a task. In some examples, the robotic implement assemblies are configured with their own internal control systems, such that control commands issued by the controller  2006  are delivered directly to the robotic implement assemblies, rather than by way of the controller  200 . 
     The present disclosure contemplates methods, systems, and program products on any machine-readable media for accomplishing various operations. The embodiments of the present disclosure may be implemented using existing computer processors, or by a special purpose computer processor for an appropriate system, incorporated for this or another purpose, or by a hardwired system. Embodiments within the scope of the present disclosure include program products comprising machine-readable media for carrying or having machine-executable instructions or data structures stored thereon. Such machine-readable media can be any available media that can be accessed by a general purpose or special purpose computer or other machine with a processor. By way of example, such machine-readable media can comprise RAM, ROM, EPROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to carry or store desired program code in the form of machine-executable instructions or data structures and which can be accessed by a general purpose or special purpose computer or other machine with a processor. When information is transferred or provided over a network or another communications connection (either hardwired, wireless, or a combination of hardwired or wireless) to a machine, the machine properly views the connection as a machine-readable medium. Thus, any such connection is properly termed a machine-readable medium. Combinations of the above are also included within the scope of machine-readable media. Machine-executable instructions include, for example, instructions and data which cause a general purpose computer, special purpose computer, or special purpose processing machines to perform a certain function or group of functions. 
     As utilized herein, the terms “approximately”, “about”, “substantially”, and similar terms are intended to have a broad meaning in harmony with the common and accepted usage by those of ordinary skill in the art to which the subject matter of this disclosure pertains. It should be understood by those of skill in the art who review this disclosure that these terms are intended to allow a description of certain features described and claimed without restricting the scope of these features to the precise numerical ranges provided. Accordingly, these terms should be interpreted as indicating that insubstantial or inconsequential modifications or alterations of the subject matter described and claimed are considered to be within the scope of the invention as recited in the appended claims. 
     It should be noted that the terms “exemplary” and “example” as used herein to describe various embodiments is intended to indicate that such embodiments are possible examples, representations, and/or illustrations of possible embodiments (and such term is not intended to connote that such embodiments are necessarily extraordinary or superlative examples). 
     The terms “coupled,” “connected,” and the like, as used herein, mean the joining of two members directly or indirectly to one another. Such joining may be stationary (e.g., permanent, etc.) or moveable (e.g., removable, releasable, etc.). Such joining may be achieved with the two members or the two members and any additional intermediate members being integrally formed as a single unitary body with one another or with the two members or the two members and any additional intermediate members being attached to one another. 
     References herein to the positions of elements (e.g., “top,” “bottom,” “above,” “below,” “between,” etc.) are merely used to describe the orientation of various elements in the figures. It should be noted that the orientation of various elements may differ according to other exemplary embodiments, and that such variations are intended to be encompassed by the present disclosure. 
     Also, the term “or” is used in its inclusive sense (and not in its exclusive sense) so that when used, for example, to connect a list of elements, the term “or” means one, some, or all of the elements in the list. Conjunctive language such as the phrase “at least one of X, Y, and Z,” unless specifically stated otherwise, is otherwise understood with the context as used in general to convey that an item, term, etc. may be either X, Y, Z, X and Y, X and Z, Y and Z, or X, Y, and Z (i.e., any combination of X, Y, and Z). Thus, such conjunctive language is not generally intended to imply that certain embodiments require at least one of X, at least one of Y, and at least one of Z to each be present, unless otherwise indicated. 
     It is important to note that the construction and arrangement of the systems as shown in the exemplary embodiments is illustrative only. Although only a few embodiments of the present disclosure have been described in detail, those skilled in the art who review this disclosure will readily appreciate that many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters, mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the novel teachings and advantages of the subject matter recited. For example, elements shown as integrally formed may be constructed of multiple parts or elements. It should be noted that the elements and/or assemblies of the components described herein may be constructed from any of a wide variety of materials that provide sufficient strength or durability, in any of a wide variety of colors, textures, and combinations. Accordingly, all such modifications are intended to be included within the scope of the present inventions. Other substitutions, modifications, changes, and omissions may be made in the design, operating conditions, and arrangement of the preferred and other exemplary embodiments without departing from scope of the present disclosure or from the spirit of the appended claim.