For best controller performance, it is recommended that these tasks be performed from time to time.
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.
NEC Maximum Current for different Copper Wire Sizes
AWG
Max.
Current
Controller to Battery Fuse = Current Rating of Charge Controller
Ex. 30A Wanderer = 30A fuse from Controller to Battery
EN
Maintenance
Fusing
16
14
12
10A
15A
20A
Fuse from Controller to Battery
Fuse from Solar Panel(s) to Controller
Ex. 200W; 2 X 100 W panels
Total Amperage = Isc1 + Isc2 = (5.75A + 5.75A) * 1.56
Fuse = minimum of 11.5 * 1.56 = 17.94= 18A fuse
10
8
6
30A
55A
75A
Parallel
4
2
0
95A
130A
170A
12