question

pietro-ceciarini avatar image
pietro-ceciarini asked

MPPT 75/15 charging 2 batteries

i have a mppt 75/15 smart solar charge controller.

can i use it for charging two batteries at the same time or it works only for one?

how should i connect them to do so?

what are pros and cons?

in case i can't i have to buy another mppt and connect it to the battery, but then how can i switch the PV energy for the two mppt controller?

thanks

MPPT ControllersbatterySolar Panel
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1 Answer
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kevgermany answered ·

You can charge two batteries at once by connecting in parallel. They effectively become a single battery. Make sure both are fully charged before connecting.

If you need to keep the batteries separate, use an Orion DC:DC charger to charge one battery from the one being charged by the solar panels.

One controller can be connected to multiple panels.

Panels cannot be connected to multiple controllers.


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