edweather
New Member
At most I'll have three panels in series at 41 VOC each. So total would be around 120 volts if I use them all. Probably will only use one or two panels at a time. It's just a hand truck emergency system. Won't use it much.
Looks like you've chosen the right breaker. What is the series fuse rating noted on the solar panels data label? You might be ok with a 15 amp breaker. If you're using 10 ga. wire then 20 is fine too. Being that the breaker will be basically a means to shut down the PV for maintenance 15 or 20 amps isn't really critical.At most I'll have three panels in series at 41 VOC each. So total would be around 120 volts if I use them all. Probably will only use one or two panels at a time. It's just a hand truck emergency system. Won't use it much.
One panel or a series string of 20 panels, same current and fuse rating.Thanks. Really appreciate the help. The fuse rating (just says fuse rating, nothing about series,) on the panel label says 20A. I am using 10 ga. wire.
Are they rated for switching at full load?GEYA Mini Circuit Breaker DC,Din Rail 6KA DC MCB (2P 32A 500V)
$14 on amazon
- I love these - they dont come with DIN rail, but that easily available
You could get single pole, but I like the double poll bc you know the Solar panels are really disconnected.
Yes, look at the specs.Are they rated for switching at full load?
Good point - In NZ, if a breaker or isolator is mandated by the code, then it must be a double pole, and non polarised.Nobody’s jumped on the comment about double pole being a nice to have instead of a must have? It’s required on the majority of system types in North America (ungrounded)
I don’t think polarized is even sensible on parallel strings. So like 90% of the time they’d be wrong or unnecessary…Good point - In NZ, if a breaker or isolator is mandated by the code, then it must be a double pole, and non polarised.
Polarised breakers were OK up to about 2014 i think. There is a massive issue with polarised breakers due to the faults that can occur (usually in the form of a completely disintegrated breaker) if they are installed incorrectly, and "correctly" is difficult even for experienced installers to get right every time, so the solution was to ban them in favour of non polarised.