alliemac9 wrote:
I mentioned that it seemed like others were putting fuses on each panel, but I never saw a discussion of why and he didn't know why and thought this was appropriate.
Any discussion of why something should probably be changed would likely help me it getting him on board. :)
The spec sheet calls for 15a max series rating. During a fault in one panel you have the potential to have the other panels feed the short with potentially 26 amps. 15a rating, 26 amps flowing is the issue. The 8.76 Isc rated panels I would probably use 10a fuses but 15a is fine.
Spec sheetFrequently no fuses are needed with three or fewer panels as the remaining panels do not produce enough current for overload. Best to have the fuses in the combiner box to reduce potential corrosion issues. The chance of fault is small so some just skip it but I have a hard time recommending no fuses.
Panels in series do not have the same issue.
