Renogy Rover 20A, Manual

Page: 27 / 64

26
Maintenance
Fusing
AWG 16 14 12 10 8 6 4 2 0
Max.
Current
55A 40A 30A 25A 18A 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