Cleaned.
Check Indiv connections, Panel to line in.With Multi.
output at Junct box into van.
Input to. and output from Regulator.
Regulator to battery bank at battery end.
Compare them going down the line. Dividing the output from each panel. then see if any drops out in line somewhere.
Multi's are the king.
a dead blocking diode can drain the rest of them. Specially at night.
Or a wire rubbing it's sheath somewhere. leaking into chassis oof.
Separate checks down the line will isolate the area? a bit.
