Recent content by Ddow

Thank you this was helpful. I will combine 4s2p before disconnect. However the Isc is now 42.8 so will use 50amp for the disconnect breaker. Does that sound correct? Then run 8awg into house. Panels are not on the roof. Should this disconnect be outside or can it be inside?

My 4s panels have Isc 13.7X1.56= 21.4A Max series fuse rating 20A I get how I wouldn't need OCPD if the Isc was under 20A for my parallel strings, but because the Isc Amps are over 20 does the NEC say I should fuse each series? I think a 30A breaker on each series then works as a disconnect and...

The more threads I read the more different ways and opinions there are. So if I could get some expert advise on my particular system I would appreciate it. 8 250W Panels (potentially very cold -10F) 4s2p Vmp 18.9V Voc 22.8V X 4 = 91.2 V Imp 13.2A Isc 13.7A X1.5 = 27.4A 2 X 4...

I could use some experienced help to get this correct. Cable size? I am upgrading to 48V system. 4 X 48V Li SOK batteries parallel. "100A Max Discharge Max charge current 100A" Inverter 48/5000/70 Victron 4000W Cont output 9000W Peak power (is this the number that should be used?)...

I have used FLA for 25 years but am ready to replace and go LI. So many choices out there, so much marketing. Cheap is never good. I would like to have batteries that last as long as possible even if it cost a bit more. My question is after reading on this forum and others it seems like BMS...

Sorry first post on this forum and didn’t realize it had already posted.

I see your point So if these are my options I would guess the first one is the better way to go? “12V 250W” Voc. 22.8V Imp 13.2 Voc 4s4p = 91.2V 48V Bat Imp = 52.8A “24V 200W” Voc. 45.4 V Imp. 5.32 A Voc 4s2p = 90.8V 48V Bat Imp. = 10.64A Shouldn’t be...

Because of physical constraints my new upgraded system I think will be limited to 8 200W panels, might be able to use 8 12V 250W Panels. Old system is 12V, new system could be 12 24 or 48. Thinking since everything is going to be replaced I should try to go to higher voltage since 1 of the 2 ox...

Because of physical constraints my new upgraded system I think will be limited to 8 200W panels, might be able to use 8 12V 250W Panels. Old system is 12V, new system could be 12 24 or 48. Thinking since everything is going to be replaced I should try to go to higher voltage since 1 of the 2 ox...