I’m installing a mppt 100/50 in a van build. I have 3 -180 watt panels wired in a series. I have a 15amp dipole disconnect between mppt and the panels but what size fuse should I use between the busbar and the mppt? I was guessing 75amps or 100??
asked
Fuse size for MPPT 100/50
It depends on the cabling that you are using between the busbar and the MPPT.
Generally I would use around 150% of expected max current (75A in this case) as a guide but only if cabling is sized to suit.
6awg is the largest that will fit the terminals on a 100/50 and that would be fine with a 75A fuse.
