mppt vs pwm
Hi, A nice little video comparing mppt vs pwm with the batteries in bulk mode. mppt vs pwm
Forum Discussion
"My point is that if one wants to point to wiring panels in series as a reason for poor performance he had better look elsewhere."
12thgenusa,
If you're referring to looking elsewhere, rather than at the efficiency graph, I agree. It compares efficiencies at various voltages, in and out, apparently at a given ambient (not panel) temperature, and at a particular irradiance; perhaps artificially produced?
But either way, what I see is mppt working slightly more efficiently at 17v input, than at 34v input. But there's much more to the issue than simply comparing minor differences in efficiencies. In fact, minor differences in efficiency may be the least important factor, here. What really matters (to me at least) is the overall performance of a system, measured in Ah's harvested. Do minor differences in efficiency play a part? I'm sure they do; but probably not a major one. What I am becoming more and more convinced of, though, is the issue of series vs. parallel may be more a matter of panel performance rather than controller performance.
12thgenusa,
If you're referring to looking elsewhere, rather than at the efficiency graph, I agree. It compares efficiencies at various voltages, in and out, apparently at a given ambient (not panel) temperature, and at a particular irradiance; perhaps artificially produced?
But either way, what I see is mppt working slightly more efficiently at 17v input, than at 34v input. But there's much more to the issue than simply comparing minor differences in efficiencies. In fact, minor differences in efficiency may be the least important factor, here. What really matters (to me at least) is the overall performance of a system, measured in Ah's harvested. Do minor differences in efficiency play a part? I'm sure they do; but probably not a major one. What I am becoming more and more convinced of, though, is the issue of series vs. parallel may be more a matter of panel performance rather than controller performance.
