Use and Care Manual

Maintenance

Fusing

AWG 16 14 12 10 8 6 4 2 0

Max.

Current

55A40A30A25A18A

75A

95A

130A

170A

**Utilize 1.56 Sizing Factor (SF)

Different safety factors could be used. The purpose is to oversize.

Series:

Total Amperage= Isc1 = Isc2 * SF

Parallel

Total Amperage= (Isc1 + Isc2) * SF

1. Check that controller is mounted in a clean, dry, and ventilated area.

2. Check wiring going into the charge controller and make sure there is no wire damage or wear.

3. Tighten all terminals and inspect any loose, broken, or burnt up connections.

4. Make sure LED readings are consistent. Take necessary corrective action.

5. Check to make sure none of the terminals have any corrosion, insulation damage, high

temperature, or any burnt/discoloration marks.

For best controller performance, it is recommended that these tasks be performed from time to time.

Risk of Electric Shock! Make sure that all power is turned off before touching the

terminals on the charge controller.

Fusing is recommended in PV systems to provide a safety measure for connections going from

panel to controller and controller to battery. Remember to always use the recommended wire

gauge size based on the PV system and the controller.

Note: The NEC code requires the overcurrent protection shall not exceed 15A for 14AWG, 20A

for 12 AWG, and 30A for 10AWG copper wire.

NEC Maximum Current for different Copper Wire Sizes

Fuse from Controller to Battery

Fuse from Solar Panel(s) to Controller

Ex. 200W; 2 X 100 W panels

Ex. 20A MPPT CC = 20A fuse from Controller to Battery

Controller to Battery Fuse = Current Rating of Charge Controller

= 5.75A * 1.56 = 8.97 =(5.75A + 5.75A)* 1.56 = 17.94

Fuse = 18A fuse Fuse = 9A fuse

NOTE

WARNING