Night time array voltage

[schroew]

One of my charge controllers is showing double the night pv volts (14.5) than the other controllers in the same system. The other controllers are around 7.2 which I was expecting. The oddball is on a metal roof while the others are ground mounted. Could the G2 solar storm cause this. I am on the south shore of lake superior.

[schroew]

dork I am. The panels on the roof are different than the ground. They have been at 14v at night for as long as I have data.
sorry

[boB]

dork I am. The panels on the roof are different than the ground. They have been at 14v at night for as long as I have data.
sorry

Interesting...

boB

[Vic]

In my experience,    the PV apparent input voltage to the Classic at night,   depends on the total reverse leakage current of the PV modules.

Generally,   it seems,   that the more strings of PVs,  on a given Classic (or MX-60,  for that matter),  the lower will be that "input" voltage  --  all other things being equal.

FWIW,   Vic

[schroew]

Bob has me worried now. I have higher wattage panels on the roof in two strings of three. Is there something wrong?

[australsolarier]

there more panels hooked up, the lower is that reverse voltage. it comes from the classic not the panels