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ewarnerusa's avatar
ewarnerusa
Nomad
Sep 13, 2016

SOLAR - Switch from PWM to MPPT, series vs parallel matter?

I put together a solar setup on our TT when we bought it new. I went with 2 x 140 watt 12V nominal panels in parallel and a PWM controller. Panel specs: Max Power: 140Wp Open Circuit Voltage (...
red31's avatar
red31
Explorer
Sep 13, 2016
look at the efficiency curves near the end of whatever controller ya might get.

higher input v (series) yields a lower efficiency.

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