Putting Fuses in a Solar System
According to the Renogy installation diagram there should be a fuse on the positive side between the solar panels and the charge controller, another between the charge controller and the battery, and ...
Forum Discussion
I got a small breaker box and breakers from AZ wind and sun, solar-electric.com; they are Midnight Solar. According to the NEC fuses or breakers on solar systems should be de-rated by 15% but that is for grid tie systems. RV's are a gray area. I prefer breakers to fuses for two reasons.
1. Gives a means to disconnect for trouble shooting.
2. Fuses are more subject to failure due to heat loss at the connections.
My panels call for a 12 amp fuse, and I used 15 amp 150vdc breakers.
For the CC output I used a 50 amp 150 vdc breaker. The CC is rated for 45 amp and its de rated value is 36 amps.
1. Gives a means to disconnect for trouble shooting.
2. Fuses are more subject to failure due to heat loss at the connections.
My panels call for a 12 amp fuse, and I used 15 amp 150vdc breakers.
For the CC output I used a 50 amp 150 vdc breaker. The CC is rated for 45 amp and its de rated value is 36 amps.
