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Luca n avatar image
Luca n asked

Mppt & pwm solar charger on same battery bank

Hi,

on my RV i have a 100w 12v solar panel with a pwm controller.

i’ve tried replacing the pwm controller with a victron100/20 mppt but often the panel doesn’t reached 17v so the charger doesn’t start at all.
now i’m addinga second 300w panel with a proper victron mppt. Is it possible to still mantain the old 100w solar panel with it’s pwm controller connected to the same battery bank or it will cause problem?

the battery bank is composed of two 100a 12v agm batteries in parallel.

MPPT Controllersmppt charging
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1 Answer
spirou avatar image
spirou answered ·

It's like solar and alternator charging at the same time. It works, but because one will likely start before the other, it might mess with the charging profile of the second.

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MPPT 150/60 up to 250/70 Manual

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