KID Manual Firmware Rev 1761

The Kid Solar Charge Controller Instructions
1 7 | Page
1 0-268-1 REV B
Chassis Ground connection
The screw, nut and terminal for grounding the chassis are included on all models.
The chassis ground (equipment ground) is required in an NEC compliant system. The chassis of the
KID is isolated from all internal KID circuitry.
Wiring the rest of the system :
Under the “Wiring diagrams” section of this manual there are seven different system configurations.
1 2, 24 and 48VDC systems are shown. These diagrams are based on common solar panels rated
between 230 and 250 watts each, and a VOC of about 37 volts. (60 cell modules). These diagrams
cover 95% of all combinations that will be used with the KID. Other solar panels are available and can
certainly be used with the KID. Study the wiring diagrams to find the one that best suits your needs.
You will see from 2 to 6 solar panels depending on system design and battery voltage. In a 1 2V
system you will be limited to just two of these solar panels. The reason is that the KID has an absolute
maximum output of 30 amps. Power is amps X voltage, so 30 amps output times 1 4 volts (charge
voltage) = 420 watts. A 500 watt PV array would be a good match for a 1 2V system. You can always
start with a smaller PV array and add to it at a later date. Keep in mind that PV voltage and current
need to be matched closely in most cases. See the power graph at the end of this section. Battery
voltage for the KID can be 1 2, 24 or 48 volts, so that means when you jump to a 24V battery bank, the
KID can process twice the power than if it were connected to a 1 2V battery. In the case of a 48V
battery, the KID can process 4 times the power of a 1 2V battery. Twelve volt batteries are used in
marine and RV and very small Renewable Energy systems. When possible, it is better to go with a
higher voltage battery bank, but that is usually not possible in a mobile application.