Abstract:
The solar powered direct current (DC) load system is a reliable, versatile and user friendly system; it uses solar energy and rechargeable battery powering at least one type of DC load which are: a type of motor operation such as water pump and/or a type of at least one LED; the system comprises a battery discharge control circuit and a battery output circuit for DC load (FIG.  1 ), at least one rechargeable battery source ( 42 -F 1 ) which is protected by a preset voltage that limits the lowest discharge level, the circuits in the FIG.  1  are able to combine the circuits in FIG.  2  and FIG.  3  which enable operations of the day time and night time DC load to synchronize the day and night cycles; FIG.  4  is a combination system which incorporates circuits in the FIG.  1  and FIG.  2  to create a water pumping system combined an illumination system which can turn on and off automatically; FIG.  4   a  with a switch and additional LEDs in addition to the FIG.  4 ; FIG.  5  is a combination system that incorporates circuits in the FIG.  1  and FIG.  3  to create a water pumping system that works during the day and shuts down at night automatically; FIG.  5   a  with a switch in addition to the FIG.  5 ; FIG.  6  is a combination system which incorporates FIG.  1  and FIG.  2  circuits to create an illumination system that has at least one LED which can turn off in the morning and turn on at the evening automatically.

Description:
CROSS-REFERENCE TO RELATED APPLICATION(S) 
       [0001]    This application, is a Continuation of U.S. patent application Ser. No. 12/381,871, filed Mar. 17, 2009, has been issued an allowance, international application has been filed on Jul. 20, 2009 with No. PCT/US2009/004183, claims priority, entitled: Solar Powered DC Load System. 
     
    
     BACKGROUND OF THE INVENTION 
       [0002]    This invention uses solar energy to power a direct current (DC) load system as well as using rechargeable batteries to store the power that can be generated by solar energy to support a DC load. More particularly this invention not only protects the rechargeable battery from over discharge and also targets various needs of the user to create several combination systems including: a water pump combined with an illuminating system, a water pumping system, and an illumination system that includes at least one LED. These combination systems can synchronize the day and night cycles to turn on and off automatically. 
         [0003]    The prior art showed some control circuits or apparatus that used solar energy to power a water pump system, or lighting system or battery protection control system. The US patent to U.S. Pat. No. 5,569,998, filed Oct. 29, 1996, by Thomas Cowan, indicated that the apparatus controlled a water pumping system with complex control circuits and a high number of components such as voltage reference generator, voltage interpreter, charge current simulator, voltage comparator, and complex charge switch driver ext. This apparatus only can be used for home and the prior art only controls a water pumping system without an illuminating system. 
         [0004]    From the US Patent Application Publication number 2008/0185988 A1, filed Feb. 7, 2007, by Chen-Yueh Fan, the control circuit shows that solar garden light device needs an external DC power source which creates additional installation work for the users to support this garden lights. One of embodiments of the present invention has an illumination system which includes at least one LED without the external DC power source. The present invention also shows different circuits and components over the prior art. The present invention can combine the illumination system with the water pumping system. 
         [0005]    The current invention has dramatic advantages which are more powerful functionalities and wider range of usage with reliable control circuits that can be put in one apparatus with varied functionality that target different working hours based on daily and seasonal cycles and different need of users. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWING 
         [0006]      FIG. 1  is a block diagram of (a) a battery discharge control circuit and (b) a battery output circuit for DC load. 
           [0007]      FIG. 2  is a block diagram of (a) a control circuit for night time DC load, (b) an output circuit for night time DC load, and (c) a charging battery circuit; 
           [0008]      FIG. 3  is a block diagram of (a) a control circuit for day time DC load, (b) a combined an output circuit for day time DC load to a battery charging circuit; 
           [0009]      FIG. 4  is a combination block diagram of (a) a battery discharge control circuit, (b) a control circuit for night time DC load, (c) a combined battery output circuit for DC load to a charging battery circuit, (d) a combined a battery output circuit for DC load to an output circuit for night time DC load; 
           [0010]      FIG. 4   a  with a switch and group  2  LED in addition to the  FIG. 4 ; 
           [0011]      FIG. 5  is a combination block diagram of (a) a battery discharge control circuit, (b) a control circuit for day time DC load, (c) a combined a battery output circuit for DC load to an output circuit for day time DC load and a charging battery circuit; 
           [0012]      FIG. 5   a  with a switch in addition to  FIG. 5 ; 
           [0013]      FIG. 6  is a combination block diagram of (a) a battery discharge control circuit, (b) a control circuit for night time DC load, (c) a combined a battery output circuit for DC load to an output circuit for night time DC load, and (d) a charging battery circuit. 
       
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
       [0014]    The Figures of drawing are for the purpose of illustration and operation of varied embodiments; the symbolized characters or alternative replacement characters denoting similar elements in the Figures are not limited scope of the invention. Certain changes may be made in the foregoing disclosure without departing from the scope of the invention. 
         [0015]    According to  FIG. 1  of the invention, the present embodiment shows there is a need to protect the rechargeable battery and it is critical to avoid the rechargeable battery from over discharge. 
         [0016]    One of the circuits involved in the present embodiment is a battery discharge control circuit. This circuit comprises a preset voltage which is determined by a number of components: at least one diode ( 14 -F 1 ,  18 -F 1 ), a zener diode  16 -F 1  or a replacement of the zener diode  16 -Fa 1 , an input of a normally open (N.O.) solid state relay  32 -F 1  or a normally open (N.O.) device  32 -Fa 1 . A nominal voltage is nominated by at least one rechargeable battery source  42 -F 1  for the DC load system. The components within the preset voltage are connected in series to each other then coupled in parallel to the rechargeable battery source  42 -F 1 . The preset voltage is approximately equal to or greater than the nominal voltage of the rechargeable battery source, when an input voltage drops out of the low end control range of the input of the N.O. solid state relay  32 -F 1  or normally open (N.O.) device  32 -Fa 1  and reaches the preset voltage level, an output of the N.O. solid state relay  32 -F 1  or the N.O. device  32 -Fa 1  opens up and disconnects at least one type of DC load  36 -F 1  that includes but not limited to a type of motor operation having at least a water pump and/or a type of at least one light emitting diode/LED to access the rechargeable battery source  42 -F 1 . The preset voltage is the lowest level that the rechargeable battery source can discharge. The rechargeable battery source includes a rechargeable battery or a rechargeable battery pack. 
         [0017]    The second circuit shown in  FIG. 1  of the present embodiment is a battery output circuit for DC load. The circuit comprises at least one rechargeable battery source  42 -F 1  that is the same power storage source in the battery discharge control circuit and is connected in parallel to a diode  26 -F 1  and the output of the N.O. solid state relay  32 -F 1  or the N.O. device  32 -Fa 1  that is the same solid state relay or the N.O. device in the battery discharge control circuit, at least one type of the DC load  36 -F 1  which includes but not limited to a type of motor operation having at least a water pump and a type of at least one LED directly or indirectly connected in series to a negative pole of the output of the N.O. solid state relay  32 -F 1  or the N.O. device  32 -Fa 1 . Additional rechargeable battery sources  42 -F 1  can increase the capacity of the power for the system. The circuits in this embodiment are reliable and have an ability to combine with additional circuits and components which make the system more useful. 
         [0018]    The battery discharge control circuit and the battery output circuit for DC load can combine with additional circuit(s) and component(s) including circuits from the  FIG. 2  and  FIG. 3  to create a combination system. 
         [0019]    Referring to the  FIG. 2  of the invention, the first circuit is a control circuit for night time DC load comprises a predetermined voltage that is determined by an input of a normally closed (N.C.) solid state relay  34 -F 2  or an input of a normally closed (N.C.) device  34 -Fa 2  connected in series to at least one diode ( 20 -F 2 ,  24 -F 2 ); a zener diode  22 -F 2  or a replacement of the zener diode  22 -Fa 2  may be connected to the input of the N.C. solid state relay  34 -F 2  or the N.C. device  34 -Fa 2  in series for adjusting the predetermined voltage up to the voltage of at least one system solar panel ( 40 -F 2 ,  41 -F 2 ), or alternatively using a small solar panel  44 -F 2  instead of the system solar panel  40 -F 2  without the diodes. The components within the predetermined voltage ( 20 -F 2 ,  22 -F 2  or  22 -Fa 2 ,  24 -F 2  and  34 -F 2  or  34 -Fa 2  input N.C.) are connected to each other in series then connected in parallel to the system solar panels ( 40 -F 2 ,  41 -F 2 ) which is synchronizing the day and night cycles for the night time DC load. 
         [0020]    Synchronizing the day and night cycles for the night time DC load means that when at least one system solar panel ( 40 -F 2 ,  41 -F 2 ) connected in parallel to the input of the normally closed (N.C.) solid state relay  34 -F 2  or the normally closed (N.C.) device  34 -Fa 2  and it may connect to the diodes ( 20 -F 2 ,  22 -F 2  or  22 -Fa 2 ,  24 -F 2 ) or using the small solar panel ( 44 -F 2 ) to replace the system solar panel  40 -F 2  without the diodes, the input of the N.C. solid state relay  34 -F 2  or the N.C. device  34 -Fa 2  prevents the system solar panels ( 40 -F 2 ,  41 -F 2 ) and the rechargeable battery source  42 -F 2  to access at least one type of the DC load  36 -F 2  which includes but not limited to a type of motor operation having at least a water pump and/or a type of at least one light emitting diode/LED in the early morning through the day, but connected the rechargeable battery source  42 -F 2  to the DC load  36 -F 2  at evening through the night, therefore an output of the N.C. solid state relay or the N.C. device  34 -F 2  opens up (is turned on) in the early morning through the day time, the DC load  36 -F 2  cannot receive power to operate, but the output of the N.C. solid state relay  34 -F 2  or the N.C. device  34 -Fa 2  is closed at evening through the night, the DC load  36 -F 2  can receive power to operate. 
         [0021]    The second circuit for  FIG. 2  of the embodiment is an output circuit for night time DC load which comprises at least one rechargeable battery source  42 -F 2  that can use the same components used in the battery discharge control circuit and the battery output circuit for DC load and is connected in parallel to a diode  30 -F 2 , an output of the N.C. solid state relay  34 -F 2  or the N.C. device  34 -Fa 2  that is the same solid state relay or the N.C. device in the control circuit for night time DC load, at least one type of the DC load  36 -F 2  which can be the same DC load in the battery output circuit and it connected in series to a negative pole of the output of the N.C. solid state relay or the N.C. device  34 -F 2 . 
         [0022]    During the day, the night time DC load  36 -F 2  has no output, but there is a charging battery circuit which includes at least one system solar panel  40 -F 2  charging at least one rechargeable battery source  42 -F 2  through an anti-reverse power diode  12 -F 2  for DC load  36 -F 2  that is used at night. The embodiment can have more than one system solar panel ( 40 -F 2 ,  41 -F 2 ) to increase the output power. The output voltage of the system solar panel  41 -F 2  can be the same value with the system solar panel  40 -F 2 , but the output of current can be the same or different. 
         [0023]    The control circuit for night time DC load, the output circuit for night time DC load and the charging battery circuit in  FIG. 2  can combine with additional circuit(s) and component(s) including circuits from the  FIG. 1  and  FIG. 3  to create a combination system which makes the system more powerful, widens the usage to satisfy users need. 
         [0024]    According to  FIG. 3  of the invention, this embodiment involves several circuits. The first one is a control circuit for day time DC load  36 -F 3  which comprises a predetermined voltage that is determined by an input of a normally open (N.O.) solid state relay  34 -F 3  or an input of a normally open (N.O.) device  34 -Fa 3  connected in series to at least one diode ( 20 -F 3   24 -F 3 ); a zener diode  22 -F 3  or replacement of the zener diode  22 -Fa 3  may be connected to the input of the N.O. solid state relay  34 -F 3  or the input of the N.O. device  34 -Fa 3  in series for adjusting the predetermined voltage up to a voltage of at least one system solar panel ( 40 -F 3 ,  41 -F 3 ) or alternatively uses a small solar panel  44 -F 3  instead of the system solar panel  40 -F 3  without the diodes; the components ( 20 -F 3 ,  24 -F 3 ,  22 -F 3  or  22 -Fa 3 ,  34 -F 3  or  34 -Fa 3  N.O. input) within the predetermined voltage are connected in series to each other then connected in parallel to the system solar panel  40 -F 3  which is synchronizing the day and night cycles for day time DC load. 
         [0025]    Synchronizing the day and night cycles for day time DC load means that when at least one system solar panel ( 40 -F 3 ,  41 -F 3 ) connected in parallel to the input of the N.O. solid state relay  34 -F 3  or the input of the normally open (N.O.) device  34 -Fa 3  and may connect to the diodes ( 20 -F 3 ,  22 -F 3  or  22 -Fa 3 ,  24 -F 3 ), or using the small solar panel  44 -F 3  to replace the system solar panel  40 -F 3  without the diodes, the input of the N.O. solid state relay  34 -F 3  or the N.O. device  34 -Fa 3  prevents the rechargeable battery source  42 -F 3  to access at least one type of the DC load  36 -F 3  which includes but not limited to a type of motor operation having at least a water pump and/or a type of at least one LED at evening through the night but is connected to the system solar panel  40 -F 3  and the rechargeable battery source  42 -F 3  to the DC load  36 -F 3  in the early morning through the day, therefore an output of the N.O. solid state relay  34 -F 3  or the N.O. device  34 -Fa 3  is closed (turned on) in the early morning through the day time, the DC load  36 -F 3  can receive power to operate; the output of the N.O. solid state relay  34 -F 3  or the N.O. device  34 -Fa 3  is opened at evening through the night, the DC load  36 -F 3  cannot receive power to operate. 
         [0026]    The second circuit for  FIG. 3  of the embodiment is a combined an output circuit for day time DC load to a battery charging circuit which comprises at least one rechargeable battery source  42 -F 3  that can be the same component used in the battery discharge control circuit and it connected in parallel to a diode  30 -F 3  and an output of the N.O. solid state relay  34 -F 3  or the N.O. device  34 -Fa 3  that is the same N.O. solid state relay or the N.O. device in the control circuit for day time DC load, at least one type of the DC load  36 -F 3  which includes but not limited to a type of motor operation having at least a water pump and/or a type of at least one LED connected to a negative pole of the output of the N.O. solid state relay  34 -F 3  or the output of the N.O. device  34 -Fa 3 , at least one system solar panel ( 40 -F 3 ,  41 -F 3 ) connected in parallel to two diodes ( 12 -F 3 ,  30 -F 3 ) and the output of the N.O. solid state relay  34 -F 3  or the N.O. device  34 -Fa 3  and the DC load  36 -F 3 ; during the day, the system solar panel ( 40 -F 3 ,  41 -F 3 ) charges at least one rechargeable battery source  42 -F 3  through an anti-reverse power diode  12 -F 3  while powering the DC load  36 -F 3  through the diodes ( 12 - 3 ,  30 -F 3 ) and the output of the N.O. solid state relay  34 -F 3  or the N.O. device  34 -Fa 3 . The DC load  36 -F 3  may receive a partial or full or non power from the system solar panel  40 -F 3  or rechargeable battery source  42 -F 3  which depends upon the system solar panel output power and rechargeable battery source capacity and sun light conditions. The output voltage of the system solar panel  41 -F 3  can be the same value with the system solar panel  40 -F 3 , but the output of current can be the same or different. 
         [0027]    The control circuit for day time DC load and the combined the output circuit for day time DC load to the battery charging circuit in  FIG. 3  can incorporate with additional circuits and components including circuits from  FIG. 1  and  FIG. 2  which makes the system more powerful and widens the usage to satisfy users need. 
         [0028]    Referring to  FIG. 4  and  FIG. 4   a  of the invention, the system selected the  FIG. 1  and  FIG. 2  to create a combination embodiment. The current embodiment shows a water pumping system combined with an illumination system which is more powerful and widens the usage to satisfy user needs. 
         [0029]    The first circuit in  FIG. 4  and  FIG. 4   a  is a battery discharge control circuit comprises a preset voltage and this voltage is determined by a number of components: at least one diode ( 14 -F 4 ,  18 -F 4 ), a zener diode  16 -F 4  or a replacement of the zener diode  16 -Fa 4 , an input of a normally open (N.O.) solid state relay  32 -F 4  or an input of a normally open (N.O.) device  32 -Fa 4  including positive and negative poles. A nominal voltage is nominated by at least one rechargeable battery source  42 -F 4 . The components within the preset voltage ( 14 -F 4 ,  16 -F 4  or  16 -Fa 4 ,  18 -F 4 ) are connected to each other in series then coupled to the rechargeable battery source  42 -F 4  in parallel. The preset voltage is approximately equal to or greater than the nominal voltage of the rechargeable battery source  42 -F 4 , when an input voltage drops out of the low end control range of the input of the N.O. solid state relay  32 -F 4  or the N.O. device  32 -Fa 4  and reaches the preset voltage level, an output of the N.O. solid state relay  32 -F 4  or the N.O. device  32 -Fa 4  opens up and disconnects at least one type of DC load  36 -F 4  that includes but not limited to a type of motor operation having at least a water pump and/or a type of at least one LED/light emitting diode to access the rechargeable battery source  42 -F 4 . The preset voltage is the lowest level that the rechargeable battery source  42 -F 4  can discharge; the rechargeable battery source  42 -F 4  includes a rechargeable battery or a rechargeable battery pack. 
         [0030]    The second circuit in  FIG. 4  and  FIG. 4   a  is a control circuit for night time DC load comprises a predetermined voltage that is determined by an input of a normally closed (N.C.) solid state relay  34 -F 4  or an input of a normally closed (N.C.) device  34 -Fa 4  connected in series to at least one diode ( 20 -F 4 ,  24 -F 4 ); a zener diode  22 -F 4  or an replacement of the zener diode  22 -Fa 4  may be connected to the input of the N.C. solid state relay  34 -F 4  or the N.C. device  34 -Fa 4  in series for adjusting the predetermined voltage up to a voltage of at least one system solar panel ( 40 -F 4 ,  41 -F 4 ); or using a small solar panel  44 -F 4  instead of the system solar panel  40 -F 4  without the diodes; the components within the predetermined voltage ( 20 -F 4 ,  22 -F 4  or  22 -Fa 4 ,  24 -F 4  and  34 -F 4  or  34 -Fa 4  N.C. input) are connected to each other in series then connected in parallel to the system solar panels ( 40 -F 4 ,  41 -F 4 ) which is synchronizing the day and night cycles for night time DC load. 
         [0031]    Synchronizing the day and night cycles for night time DC load means that when at least one system solar panel ( 40 -F 4 ,  41 -F 4 ) connected in parallel to the input of the N.C. solid state relay  34 -F 4  or the input of the N.C. device  34 -Fa 4  and may connect to the diodes ( 20 -F 4 ,  22 -F 4  or  22 -Fa 4 ,  24 -F 4 ) or using the small solar panel to replace the system solar panel  44 -F 4  without the diodes, the input of the N.C. solid state relay  34 -F 4  or the N.C. device  34 -Fa 4  prevents the system solar panel  40 -F 4  and the rechargeable battery source  42 -F 4  to access at least one type of DC load that includes but not limited to a type of at least one LED/light emitting diode (LED 1 -F 4 , LED 2 -F 4 , LEDn-F 4 ) for the embodiment of the  FIG. 4 , and group  1  LED and a group  2  LED for the embodiment of the  FIG. 4   a  in the early morning through the day, but connected the rechargeable battery source  42 -F 4  to the DC load of at least one LED (LED 1 -F 4 , LED 2 -F 4 , LEDn-F 4 ), the group  1  LED and the group  2  LED at evening through the night, the output of the N.C. solid state relay  34 -F 4  or the output of the N.C. device  34 -Fa 4  is opened in the early morning through the day time, the DC load of at least one LED (LED 1 -F 4 , LED 2 -F 4 , LEDn-F 4 ), the group  1  LED and the group  2  LED cannot receive power; an output of the N.C. solid state relay  34 -F 4  or the N.C. device  34 -Fa 4  is closed at evening through the night time, the DC load of the at least one LED (LED 1 -F 4 , LED 2 -F 4 , LEDn-F 4 ), the group  1  LED, and the group  2  LED can receive power to illuminate. 
         [0032]    The third circuit is a combined the battery output circuit for DC load to a charging battery circuit comprises at least one rechargeable battery source  42 -F 4  that is the same storage source in the battery discharge control circuit and is connected in parallel to a diode  26 -F 4  and an output of the Normally Open (N.O.) solid state relay  32 -F 4  or an output of the normally open (N.O.) device  32 -Fa 4  that is the same solid state relay or the device in the battery discharge control circuit, the DC load water pump  36 -F 4  directly or indirectly connected in series to a negative pole of the output of the N.O. solid state relay  32 -F 4  or the N.O. device  32 -Fa 4  through a double pole double throw  38 -F 4  for  FIG. 4   a  or without a double pole double throw  38 -F 4  for  FIG. 4 ; during the day, at least one system solar panel ( 40 -F 4 ,  41 -F 4 ) charges at least one rechargeable battery source  42 -F 4  through a diode  12 -F 4  which is for anti-reverse power purpose while powers the water pump  36 -F 4  through the diode  26 -F 4  and the output of the N.O. solid state relay  32 -F 4  or the N.O. device  32 -Fa 4  if sun light is intense enough. The water pump  36 -F 4  may receive a partial or full or non power from the system solar panel  40 -F 4  or rechargeable battery source  42 -F 4  which depends upon the system solar panels ( 40 -F 4 ,  41 -F 4 ) output power and rechargeable battery source  42 -F 4  capacity and sun light conditions. 
         [0033]    The fourth circuit is a combined the battery output circuit for DC load to an output circuit for night time DC load comprises at least one rechargeable battery source  42 -F 4  which is the same component in the battery discharge control circuit and is connected in parallel to the diode  26 -F 4 , the output of the N.O. solid state relay  32 -F 4  or the N.O. device  32 -Fa 4  that is the same N.O. solid state relay or the N.O. device in the battery discharge control circuit, an output of the N.C. solid state relay  34 -F 4  or the N.C. device  34 -Fa 4  that is the same solid state relay or the N.C. device in the control circuit for night time DC load and is connected in series to a negative pole of the output of the N.O. solid state relay  32 -F 4  or the device  32 -Fa 4  through a diode  30 -F 4 , the at least one type of DC load that includes but not limited to a type of at least one LED (LED 1 -F 4 , LED 2 -F 4 , LEDn-F 4 ) connected to a negative pole of the output of the solid state relay  34 -F 4  or the N.C. device  34 -Fa 4  for the  FIG. 4 ; a group  1  LED and a group  2  LED connected to the negative pole of the output of the N.C. solid state relay  34 -F 4  or the N.C. device  34 -Fa 4  for  FIG. 4   a.    
         [0034]    The embodiment in the  FIG. 4  is for a warm climate area, the water is not frozen all year, so the water pump  36 -F 4  does not have to shut down. But in some areas during the winter or when the water is frozen the water pump  36 -F 4   a  cannot pump the water, the embodiment in the  FIG. 4   a  allows the DC load  36 -F 4  to shut down when needed. A double pole double throw (DPDT) switch  38 -F 4  or an equivalent component performs similar functions like the DPDT switch may employ to perform those features. The DPDT switch  38 -F 4  can disconnect the DC load water pump  36 -F 4  to access the rechargeable battery source  42 -F 4  and the system solar panel  40 -F 4  through the diodes ( 12 -F 4 ,  26 -F 4 ) and the output of the N.O. solid state relay  32 -F 4  or the N.O. device  32 -Fa 4  while it can simultaneously connect the group  2  LED which includes at least one LED to the rechargeable battery source through the diode  26 -F 4 , the output of the N.O. solid state relay  32 -F 4  or the N.O. device  32 -Fa 4 , the diode  30 -F 4  and the output of the N.C. solid state relay  34 -F 4  or the N.C. device  34 -Fa 4 , or non-connected to either the water pump  36 -F 4  nor the DC load group  2  LED; the group  2  LED is for balancing the power usage when the rechargeable battery source  42 -F 4  does not powering the DC load water pump  36 -F 4 . 
         [0035]    The  FIG. 5  and  FIG. 5   a  of the invention show selections from  FIG. 1  and  FIG. 3  to create a combination of the DC load water pumping system which works during the day and shuts off at night automatically, the combination system is an another example for widening the usage and satisfying different users need. 
         [0036]    The first circuit in  FIG. 5  and  FIG. 5   a  is a battery discharge control circuit comprises a preset voltage which is determined by: at least one diode ( 14 -F 5 ,  18 -F 5 ), a zener diode  16 -F 5  or a replacement of the zener diode  16 -Fa 5 , an input of a normally open (N.O.) solid state relay  32 -F 5  or an input of a normally open (N.O.) device  32 -Fa 5 . A nominal voltage is nominated by at least one rechargeable battery source  42 -F 5 . The components within the preset voltage are connected to each other in series then coupled to the rechargeable battery source  42 -F 5  in parallel. The preset voltage is approximately equal to or greater than the nominal voltage of the rechargeable battery source  42 -F 5 . When the input voltage drops out of the low end control range of the input of the N.O. solid state relay  32 -F 5  or the N.O. device  32 -Fa 5  and reaches the preset voltage level, an output of the N.O. solid state relay  32 -F 5  or the N.O. device  32 -Fa 5  opens up and disconnects at least one type of DC load  36 -F 5  that includes but not limited to a type of motor operation having at least a water pump and/or a type of at least one LED/light emitting diode to access the rechargeable battery source  42 -F 5 . The preset voltage is the lowest level that the rechargeable battery source  42 -F 5  can discharge. The rechargeable battery source  42 -F 5  includes a rechargeable battery or a rechargeable battery pack. 
         [0037]    The second circuit in  FIG. 5  and  FIG. 5   a  is a control circuit for day time DC load comprises a predetermined voltage that is determined by an input of a normally open (N.O.) solid state relay  34 -F 5  or an input of a normally open (N.O.) device  34 -Fa 5  connected in series to at least one diode ( 20 -F 5 ,  24 -F 5 ); a zener diode  22 -F 5  or a replacement of the zener diode  22 -Fa 5  may be connected to the input of the N.O. solid state relay  34 -F 5  or the N.O. device  34 -Fa 5  in series for adjusting the predetermined voltage up to the voltage of at least one system solar panel ( 40 -F 5 ,  41 -F 5 ); or alternatively using a small solar panel  44 -F 5  instead of the system solar panel  40 -F 5  without the diodes. The components within the predetermined voltage ( 20 -F 5 ,  22 -F 5  or  22 -Fa 5 ,  24 -F 5  and  34 -F 5  or  34 -Fa 5  N.O. input) are connected in series to each other then connected in parallel to the system solar panels ( 40 -F 5 ,  41 -F 5 ) which is synchronizing the day and night cycles for day time DC load. 
         [0038]    Synchronizing the day and night cycles for day time DC load means that when at least one system solar panel ( 40 -F 5 ,  41 -F 5 ) connected in parallel to the input of the normally open (N.O.) solid state relay  34 -F 5  or the input of the N.O. device  34 -Fa 5  and may connect to the diodes ( 20 -F 5 ,  22 -F 5  or  22 -Fa 5  and  24 -F 5 ), or using the small solar panel  44 -F 5  to replace the system solar panel ( 40 -F 5 ,  41 -F 5 ) without the diodes, the input of the N.O. solid state relay  34 -F 5  or the N.O. device  34 -Fa 5  prevents the system solar panel and the rechargeable battery source  42 -F 5  to access at least one type of DC load  36 -F 5  that includes but not limited to a type of motor operation having at least a water pump at the evening and through the night but connected the system solar panel  40 -F 5  and rechargeable battery source  42 -F 5  to the water pump  36 -F 5  in the early morning through the day, therefore an output of the N.O. solid state relay  34 -F 5  or the N.O. device  34 -Fa 5  is closed (turned on) in the early morning through the day time, the at least one type of DC load  36 -F 5  can receive power to operate, the output of the N.O. solid state relay  34 -F 5  or the N.O. device  34 -Fa 5  is opened at evening through the night, the at least one type of DC load  36 -F 5  cannot receive power to operate; 
         [0039]    The third circuit in  FIG. 5  and  FIG. 5   a  is a combined a battery output circuit to an output circuit for day time DC load and the charging battery circuit comprises at least one rechargeable battery source  42 -F 5  that is the same power storage source in the battery discharge control circuit and it connected in parallel to a diode  26 -F 5  and an output of the Normally Open (N.O.) solid state relay  32 -F 5  or the N.O. device  32 -Fa 5  that is the same N.O. solid state relay or the N.O. device in the battery discharge control circuit, the output of the N.O. solid state relay  34 -F 5  or the N.O. device  34 -Fa 5  that is the same N.O. solid state relay or the N.O. device in the control circuit for day time DC load and is connected in series to a negative pole of the output of the N.O. solid state relay  32 -F 5  or the N.O. device  32 -Fa 5  through a diode  30 -F 5 , the DC load  36 -F 5  which includes but not limited to a type of motor operation having at least a water pump connected in series to a negative pole of the output of the N.O. solid state relay  34 -F 5  or the N.O. device  34 -Fa 5  which is the same solid state relay or the device used in the control circuit for day time DC load; the reversed order of connection between the output of the N.O. solid state relay  34 -F 5  or the N.O. device  34 -Fa 5  and the output of the Normally Open (N.O.) solid state relay  32 -F 5  or the N.O. device  32 -Fa 5  also works fine in the combined a battery output circuit to an output circuit for day time DC load and the charging battery circuit; during the day if sun light is intensity enough, at least one system solar panel ( 40 -F 5 ,  41 -F 5 ) charges at least one rechargeable battery source  42 -F 5  through a switch  10 -F 5  and a diode  12 -F 5  for  FIG. 5   a  or through the diode  12 -F 5  for  FIG. 5  while powers the water pump  36 -F 5  through a diode  26 -F 5 , the output of the N.O. solid state relay  32 -F 5  or the N.O. device  32 -Fa 5 , the diode  30 -F 5  and the output of the N.O. solid state relay  34 -F 5  or the N.O. device  34 -Fa 5 . The water pump  36 -F 5  may receive a partial or full or non power from the system solar panel  40 -F 5  or rechargeable battery source  42 -F 5  which depends upon the system solar panel output power and the rechargeable battery source  42 -F 5  capacity and sun light conditions; the single pole single throw switch  10 -F 5  may employ to control the system solar panels ( 40 -F 5 ,  41 -F 5 ) to access all the circuits including all of the components when the weather not allowed the water pump  36 -F 5  to pump the water; the diode  12 -F 5  is for anti-reverse power purpose. 
         [0040]    The  FIG. 6  of the invention selected  FIG. 1  and  FIG. 2  to create a combination embodiment for night time DC load system which includes an illumination system, a water pumping system or the illuminating system combines with a water pumping system, the night time DC load turned off in the morning through the day and turns on at evening through the night automatically; these are examples of widening the usage and satisfying different users needs. 
         [0041]    The first circuit in  FIG. 6  is a battery discharge control circuit comprises a preset voltage which is determined by a number of components: at least one diode ( 14 -F 6 ,  18 -F 6 ), a zener diode  16 -F 6  or a replacement of the zener diode  16 -Fa 6 , an input of a normally open (N.O.) solid state relay  32 -F 6  or a normally open (N.O.) device  32 -Fa 6 . A nominal voltage is nominated by at least one rechargeable battery source  42 -F 6 . The components within the predetermined voltage are connected to each other in series ( 14 -F 6 ,  16 -F 6  or  16 -Fa 6 ,  18 -F 6 ,  32 -F 6  or  32 -Fa 6  N.O. input) then coupled to at least one rechargeable battery source  42 -F 6  in parallel. The preset voltage is approximately equal to or greater than the nominal voltage of the rechargeable battery source, when the input voltage drops out of the low end control range of the input of the N.O. solid state relay  32 -F 6  or the N.O. device  32 -Fa 6  and reaches the preset voltage level, an output of the N.O. solid state relay  32 -F 6  or the N.O. device  32 -Fa 6  opens up and disconnects at least one type of DC load  36 -F 6  that includes but not limited to a type of motor operation having at least a water pump and/or a type of at least one LED (LED 1 -F 6 , LED 2 -F 6 , LED_n-F 6 ) to access the rechargeable battery source  42 -F 6 . The preset voltage is the lowest level that the rechargeable battery source  42 -F 6  can discharge. The rechargeable battery source  42 -F 6  includes a rechargeable battery or a rechargeable battery pack. 
         [0042]    The second circuit in  FIG. 6  is a control circuit for night time DC load includes a predetermined voltage that is determined by an input of normally closed (N.C.) solid state relay  34 -F 6  or an input of a normally closed (N.C.) device  34 -Fa 6  connected in series to at least one diode ( 20 -F 6 ,  24 -F 6 ), a zener diode  22 -F 6  or a replacement of the zener diode  22 -Fa 6  may be connected to the input of the N.C. solid state relay  34 -F 6  or the N.C. device  34 -Fa 6  in series for adjusting the predetermined voltage up to the voltage of at least one system solar panel  40 -F 6 , or alternatively using a small solar panel  44 -F 6  instead of the system solar panel  40 -F 6  without the diodes; the components within the predetermined voltage ( 20 -F 6 ,  22 -F 6  or  22 -Fa 6 ,  24 -F 6  and  34 -F 6  or  34 -Fa 6  N.C. input) are connected in series to each other then connected in parallel to the system solar panel ( 40 -F 6 ) which is synchronizing the day and night cycles for the night time DC load. 
         [0043]    Synchronizing the day and night cycles for night time DC load means when at least one system solar panel ( 40 -F 6 ,  41 -F 6 ) connected in parallel to the input of the normally closed (N.C.) solid state relay  34 -F 6  or the input of the normally closed (N.C.) device  34 -Fa 6  and may connected to the diodes ( 20 -F 6 ,  22 -F 6  or  22 -Fa 6 ,  24 -F 6 ), or using a small solar panel  44 -F 6  to replace the system solar panel  40 -F 6  without the diodes, the input of the N.C. solid state relay  34 -F 6  or the N.C. device  34 -Fa 6  prevents the system solar panel  40 -F 6  and the rechargeable battery source  42 -F 6  to access the at least one type of DC load  36 -F 6  that includes but not limited to a type of motor operation having at least a water pump and/or a type of at least one LED (LED 1 -F 6 , LED 2 -F 6 , LED_n-F 6 ) in the early morning through the day but connected the rechargeable battery source  42 -F 6  to access the DC load  36 -F 6  at evening through the night, therefore an output of the N.C. solid state relay  34 -F 6  or the N.C. device  34 -Fa 6  turned on in the early morning through the day time, the DC load  36 -F 6  cannot receive power, the output of the N.C. solid state relay  34 -F 6  or the N.C. device  34 -Fa 6  is closed at evening through the night time, the DC load  36 -F 6  can receive power for illumination and/or operation. 
         [0044]    The third circuit in  FIG. 6  is a combined a battery output circuit to an output circuit for night time DC load comprises at least one rechargeable battery source  42 -F 6  which is the same battery source in the battery discharge control circuit and is connected in parallel to a diode  26 -F 6  and an output of the N.O. solid state relay  32 -F 6  or the normally open (N.O.) device  32 -Fa 6  that is the same N.O. solid state relay or the N.O. device in the battery discharge control circuit, the output of the N.C. solid state relay  34 -F 6  or the N.C. device  34 -Fa 6  that is the same solid state relay or the device in the control circuit for night time DC load and is connected in series to a negative pole of the output of the N.O. solid state relay  32 -F 6  or the output of the device  32 -Fa 6  through a diode  30 -F 6 , the at least one type of DC load  36 -F 6  includes but not limited to a type of motor operation having at least a water pump and/or a type of at least one LED (LED 1 -F 6 , LED 2 -F 6 , LED_n-F 6 ) connected directly or indirectly to a negative pole of the output of the N.C. solid state relay  34 -F 6  or the N.C. device  34 -Fa 6 ; the reversed order of connection between the output of the N.C. solid state relay  34 -F 6  or the N.C. device  34 -Fa 6  and the output of the N.O. solid state relay  32 -F 6  or the normally open (N.O.) device  32 -Fa 6  also works fine for the combined a battery output circuit to an output circuit for night time DC load. 
         [0045]    During the day, there is a charging battery circuit, at least one system solar panel ( 40 -F 6 ,  41 -F 6 ) charges at least one rechargeable battery source  42 -F 6  through a diode  12 -F 6  which is used for anti-reversed power. 
         [0046]    The combination system selected circuits and components from  FIG. 1  and  FIG. 2  to create night time DC load system it turned off in the morning through the day and turns on at evening through the evening automatically, which is another example of widening the usage to satisfy different user needs. 
         [0047]    The normally open (N.O.) device ( 32 -Fa 1 , or  34 -Fa 3 , or  32 -Fa 4 , or  32 -Fa 5 , or  34 -Fa 5 , or  32 -Fa 6 ) is a device that can replace the normally open (N.O.) solid state relay ( 32 -F 1 , or  34 -F 3 , or  32 -F 4 , or  32 -F 5 , or  34 -F 5 , or  32 -F 6 ) respectively which has an input including positive and negative poles (control terminals) and an output including positive and negative poles (first and second terminals), the input current and voltage control the output current and voltage, the normally open (N.O.) device further including a normally open I/O module, or a normally open relay, or a normally open optocoupler (opto-isolator) or the device that performs the similar functions as the normally open device. 
         [0048]    The normally closed (N.C.) device ( 34 -Fa 2  or  34 -Fa 4  or  34 -Fa 6 ) is a device can replace the normally closed (N.C.) solid state relay ( 34 -F 2  or  34 -F 4  or  34 -F 6 ) respectively, which has an input including positive and negative poles (control terminals) and an output including positive and negative poles (first and second terminals), the input current and voltage control the output current and voltage, the N.C. device further including a normally closed I/O module, or a normally closed relay, or a optocoupler (opto-isolator) or the N.C. device that performs the similar functions as the normally closed device. 
         [0049]    The replacement of the zener diode  16 -Fa 1  or  22 -Fa 2  or  22 -Fa 3  or  22 -Fa 4  or  16 -Fa 4  or  16 -Fa 5  or  22 -Fa 5  or  16 -Fa 6  or  22 -Fa 6  can replace the zener diode  16 -F 1  or  22 -F 2  or  22 -F 3  or  22 -F 4  or  16 -F 4  or  16 -F 5  or  22 -F 5  or  16 -F 6  or  22 -F 6  respectively, the replacement of the zener diode further including a light emitting diode, or a resistor, or a component that consumes approximately the same voltage and current as the zener diode. 
         [0050]    The small solar panel  44 -F 2 , or  44 -F 3 , or  44 -F 4  or  44 -F 5  or  44 -F 6  is a small output power solar panel that is only used for controlling the input of the normally closed (N.C.) solid state relay  34 -F 2 , or  34 -F 4  or  34 -F 6  or the input of the normally closed (N.C.) device  34 -Fa 2 , or  34 -Fa 4  or  34 -Fa 6  and the input of the normally open (N.O.) solid state relay  34 -F 3 , or  34 -F 5  or the input of the normally open (N.O.) device  34 -Fa 3 , or  34 -Fa 5 , it has approximately the same effect compared to using the system solar panel  40 -F 2 ,  41 -F 2  or  40 -F 3 ,  41 -F 3  or  40 -F 4 ,  41 -F 4  or  40 -F 5 ,  41 -F 5  or  40 -F 6 ,  41 -F 6  respectively for synchronizing the day and night cycles.