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Figure 24 Electrical box. Contents include battery (12v, 7ahr); Genasun solar charge controller; programmable timer (instructions
beneath); battery charger; and battery tester (green). Solar panel inputs enter through the elbow on the left and mate with the
connectors at “solar panels in”. Pump wires enter through the elbow at bottom of picture and attach to the terminals labeled
“pump in”. Pump brown (+) and black (-) wires connect with circuit red (+) and blue (-) wires respectively. Everything is easy to
reach especially the timer for programming. Lift the timer to access the single AA battery that we recommend changing between
crops. The battery charger is for emergency charging only as in operation the battery stays continually charged by the solar panels.
The battery tester is useful for measuring solar panel input as well as battery current.
The electrical box serves to connect the solar panels directly to the pump, and to a charge
controller that keeps a small battery fully charged. We find it satisfactory for the timer to run the
pump off the battery for 2 minutes at 10a, noon, 2p, 4p, and 6p. On sunny days the battery is
irrelevant as the panels power the pump. On rainy cloudy days, however, plants still transpire
slowly and eventually wilt. A few minutes of battery charged pump operation throughout the day
is more than adequate to save those plants under those conditions. Don’t run the battery more
than necessary on cloudy days or you risk running it down. A battery tester is provided. Set it to
12v to see how much juice is left in the battery. A battery charger is also provided. If you find
your battery discharged remove it to a 120v source and let it charge overnight. Detailed
instructions including for programming the timer are included in the Operating Instructions. The
timer can be gently lifted to reach the battery compartment to replace the 2 AA batteries
Summary of Contents for My Garden
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