Derating 24v Solar Panels?
I'm considering running two 250w/24v poly panels; tracked/pointed during spring/fall, and flat during the summer; thru the Tracer 3215BN 30a mppt controller. I can also get 200w/24v mono panels, local...
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red31 wrote:jrnymn7 wrote:
I'm just saying it would be better to run parallel/mppt, if and when the panels and controller are hot. Less bucking means higher efficiency, lower heat generation, and thus better overall performance.
Same as when not hot. 1% efficiency difference between 33v and 66v (12v system), same power. I'm sure the owner's manual graph ignores voltage drop ;)
24-24 is more efficient than 24-12 but then you have more "overhead" with 24-12 in low light that might get you more AH in a day? It is all scenario dependent it seems.
Just stick the darn thing out in the sun and you get what you get!
( Not that I would accept such advice :( )
