Cable size for 160W portable solar panel
Have 2 trailers. Trailer #1 has an existing 30A PWM charge controller being fed by a single 160W roof mounted panel. The controller is about 2' from the 2 6v batteries with a shunt between them for th...
Forum Discussion
Bend wrote:
OP-
The secret of good solar PWM charging performance is conserving voltage. Once that is done, amps will take care of themselves. You need at least 16.5 volts at the controller for it to work and usually 14.8 volts at the batts. Your winter RV will probably need more solar watts and battery voltage due to low temps.
This, and sometimes you need even more at the battery with problematic batteries like group 31's or Trojan T-1275's, something aroud 15.0 to 15.3V at the batteries. See the "My screwy 31" thread by landyacht318.
