mppt or pwm An opinion from Victron
Hi all, Victron, which makes high quality equipment, has charge controllers. At the end of an overview they give their description of the differences between PWM and MPPT. They do not support it wi...
Forum Discussion
I am losing some amperage by having the array Voc so close to the controller's max Voc intake rating, according to the efficiency curves I have seen on that. (Eco-Worthy 42V max Voc and 230w panel with 30v Vmp, Voc at 34 when in the sun, 36.8 rated)
This suggests for max efficiency (but at some big expense in dollars) you should way over-do your controller's max Voc limit compared with your array's total Voc.
In my case assuming it all flows through and shows up in the amps, then by operating at WAG 93% efficiency instead of WAG 98%, losing 5%, then when I see 15 amps at the 93% then I should be seeing 98/93 x 15 = 15.8 amps
If I ever get that far I will measure Imp to go with my Vmp I already can measure, so I will know my input watts to compare with my output watts I already have. Then I can get the actual efficiency percentage. But the curve on Voc limit and array Voc in the Tracer manual is a good indication of what I should expect.
This suggests for max efficiency (but at some big expense in dollars) you should way over-do your controller's max Voc limit compared with your array's total Voc.
In my case assuming it all flows through and shows up in the amps, then by operating at WAG 93% efficiency instead of WAG 98%, losing 5%, then when I see 15 amps at the 93% then I should be seeing 98/93 x 15 = 15.8 amps
If I ever get that far I will measure Imp to go with my Vmp I already can measure, so I will know my input watts to compare with my output watts I already have. Then I can get the actual efficiency percentage. But the curve on Voc limit and array Voc in the Tracer manual is a good indication of what I should expect.
