solar + batteris
Hi all. I am in proses of installing solar on my FW I planed on installing 2 /150W panels but made mistake when ordering and ordered 2 lots of 2 so have got 4/150W panels, also got 30' of 8AVG cabl...
Forum Discussion
BFL said,
"A panel will do its Isc (ignore the lower amp Imp for MPPT) at STC when the panel is aimed at the sun. So how much less you get when the panel is flat depends on how high the sun gets where you are at what time of year.
You can be far enough South in the summer that your flat panel will hit its full Isc rating."
At a 30 degree angle of incidence, the 4 panels can still put out about 90% of their Isc. At 45 degrees, about 80%. That's over 32a, and about 29a, respectively. So using all 4 panels is too much.
"A panel will do its Isc (ignore the lower amp Imp for MPPT) at STC when the panel is aimed at the sun. So how much less you get when the panel is flat depends on how high the sun gets where you are at what time of year.
You can be far enough South in the summer that your flat panel will hit its full Isc rating."
At a 30 degree angle of incidence, the 4 panels can still put out about 90% of their Isc. At 45 degrees, about 80%. That's over 32a, and about 29a, respectively. So using all 4 panels is too much.
