Forum Discussion

FireGuard's avatar
FireGuard
Explorer II
Jun 03, 2016

Will solar panel keep batteries charged while running fridge

I want to leave my Lance parked on my property so I have the comforts of home while there. (5 acres of vacant land) I have water but no elec. and will probably stay in it 1 or 2 nights every week or ...
Truck Campers
kohldad's avatar
kohldad
Explorer III
Jun 06, 2016
Advantage of a MPPT over PWM increases as the voltage of the panel increases.

If you have 100 Watt panel that operates at 17.6V, the most current you will see is (100/17.6) 5.68A with a PWM. However, a MPPT controller can get you (100/14.2) 7.04A.

It isn't about the cost efficiency of a MPPT controller, but that you can do more with less real estate which is a premium on a TC.

Note: Calculations based on 100% efficiency for controllers and a 14.2V charge voltage.

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