An electrostatic sprayer apparatus comprising: a housing configured to receive a power system; a nozzle assembly disposed at a first end of the housing; a reservoir configured to have a fluid disposed therein, the reservoir further configured for fluid communication with the nozzle assembly; an electrostatic module disposed within the housing; and at least one electrode assembly (1310, 2415) in electrical communication with the electrostatic module via a conductive wire, the at least one electrode assembly configured for electrostatic charging of the at least portion of the fluid; wherein the nozzle assembly comprises: a nozzle housing; characterized by a rotatable component received within the nozzle housing; and one or more nozzles coupled to the rotatable component, the nozzle assembly configured to, via rotation of the rotatable component and alignment of one of the nozzles with an outlet of the nozzle assembly, enable selection of a specified flow pattern for the electrostatically charged at least portion of the fluid during the dispensing thereof to the exterior of the electrostatic sprayer apparatus, the apparatus further comprising a grounded ring disposed at the first end of the housing, the grounded ring being distal relative to the nozzle assembly, a pump disposed within the housing, the pump configured to be powered by the power system and to pump at least a portion of the fluid from the reservoir to the nozzle assembly for dispensing the at least portion of the fluid through the nozzle assembly to an exterior of the electrostatic sprayer apparatus; wherein the at least one electrode assembly comprises a first electrode assembly disposed in a flow pathway between the pump and the nozzle assembly, the first electrode assembly configured for direct charging of the at least portion of the fluid as it passes through the flow pathway. a housing configured to receive a power system; a nozzle assembly disposed at a first end of the housing; a reservoir configured to have a fluid disposed therein, the reservoir further configured for fluid communication with the nozzle assembly; an electrostatic module disposed within the housing; and at least one electrode assembly (1310, 2415) in electrical communication with the electrostatic module via a conductive wire, the at least one electrode assembly configured for electrostatic charging of the at least portion of the fluid; wherein the nozzle assembly comprises: a nozzle housing; characterized by a rotatable component received within the nozzle housing; and one or more nozzles coupled to the rotatable component, the nozzle assembly configured to, via rotation of the rotatable component and alignment of one of the nozzles with an outlet of the nozzle assembly, enable selection of a specified flow pattern for the electrostatically charged at least portion of the fluid during the dispensing thereof to the exterior of the electrostatic sprayer apparatus, a nozzle housing; characterized by a rotatable component received within the nozzle housing; and one or more nozzles coupled to the rotatable component, the nozzle assembly configured to, via rotation of the rotatable component and alignment of one of the nozzles with an outlet of the nozzle assembly, enable selection of a specified flow pattern for the electrostatically charged at least portion of the fluid during the dispensing thereof to the exterior of the electrostatic sprayer apparatus, the apparatus further comprising a grounded ring disposed at the first end of the housing, the grounded ring being distal relative to the nozzle assembly, a pump disposed within the housing, the pump configured to be powered by the power system and to pump at least a portion of the fluid from the reservoir to the nozzle assembly for dispensing the at least portion of the fluid through the nozzle assembly to an exterior of the electrostatic sprayer apparatus; wherein the at least one electrode assembly comprises a first electrode assembly disposed in a flow pathway between the pump and the nozzle assembly, the first electrode assembly configured for direct charging of the at least portion of the fluid as it passes through the flow pathway.