Solar Systems

[Skvez]

(25 September 2013, 16:58)Lightspeed Wrote: In mid winter, cloudy conditions what is the typical output you see from each of your 250W panels? I have to deal with quite cold conditions here and am trying to gauge expected power available taking account of reduced panel output and increased internal losses in the accumulators.

There are different technologies of PV and they vary quite a bit in terms of how much power they can create in winter but the short answer is expect in the region of 1% to 10% of full rating! (Yes it can be just a few percent)
Cold should actually improve the performance of the panels a few percent (of output, not of rated) but the batteries dislike cold more than the PV like it.
Increased losses in the system should be negligible.