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obiwancanoli's avatar
obiwancanoli
Explorer
Apr 23, 2018

Replacing current 30A with MPPT controller - make sense?

Some of you have followed other posts of mine re: solar, and satellite, so hope this additional inquiry elicits similarly helpful info... If I knew then what I suspect now, I'd have had the Dealer ...
Almot's avatar
Almot
Explorer III
Apr 25, 2018
3 times boost is pretty close.

3 panels in series, 3 times VMP, say, 54V? MPPT conversion 54V/14V, minus conversion losses - total Imp boost 3.5-3.8 times.
Isc (with PWM) is a little higher than Imp, so in the end he'll get charging current 3.0-3.2 times higher than with PWM.

Doesn't mean MPPT is 3 times better, it's just using the right controller with right wiring.

Still remains to be confirmed by the OP that the dealer has indeed wired series with PWM.

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