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
jrnymn7 wrote:
I wouldn't go with 24v panels at anything less than 460w, flat mounted, myself. Which is probably pretty close to what a 12v 300w pointed array would do.
Yes and no. In mid-summer the difference in harvest between flat and tilted is ~30% or less, so 300W tilted will harvest less than 460W flat. Besides, tilt is usually to one side only, and you don't always park with that side to the South. In Southern states I would say 300W tilt-able will collect less than 460W flat. In winter titled 300 could beat 460 flat, especially up North.
24V panels start at ~180W, so a pair of them would be pretty much +400W. With size (and often price too) of 200W panel being the same as 250W, and MPPT controllers being tolerable to current over its rated limit, it indeed makes makes sense to max it up to 480-500W.
Roof-mounted tilt-able and point-able arrays have fallen out of favor lately, with panel prices low. Especially point-able, i.e. with adjustable azimuth - too complicated, and a pain climbing up and down.
