mppt vs pwm

Four 250w/24v panels = 1000w.

Six 160w/12v panels = 960w

1000w - 960w = 40w.

40w / 13.5v = ~3a

At 13.5v that's only a 3a difference, and yet a 960w/12v/series array produces 12 amps less than the 1000w/24v/parallel array. So where did the extra 9 amps go? That's a 20% loss.

that is at the panel, at 100% efficiency

now factor % of loss per panel by 2 more panels 6 vs 4

now wiring losses,
4 panels in parallel, vs 3 series sets in parallel

install both sets, run identical loads on both simultaneously , and measure the output

they might be closer together than that (9a-20%) loss , where did you get that number

my 505w system does not give me 505w
amount wire, how its wired, are panels tilted, panel age (mine were all bought used and are a flat install) etc...

you can't argue theoretical on paper vs real, you can compare on paper, or installed, but not one to the other
unless of course, you want to compare, paper math of the install to the real world results


each system is entirely different