question

rubytuesday avatar image

How to wire MPPT and DCDC charger in same system

I am getting a 120amp LifePo4 and wanting to charge from both Victron solar and dcdc from starter battery

Will these two interfere with each other whilst driving? I have heard that they can cancel each other out.
Should I include a manual switch so I can choose to use one or the other? Or is there another way to insure that my batteries will be getting charges whilst driving.
thanks!!

MPPT - Solar Charge ControllerLithium Batterybattery chargingdc dc converters
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1 Answer
randy-putnam avatar image
randy-putnam answered ·

They shouldn’t cancel each other out, but what kind of solar controller do you have? Last year I charged a FLA house and engine battery bank with shore power and solar power on our boat with no problem. When shore power was on the MPPT solar controller sensed battery capacity and adjusted accordingly. One did not add to the other, they both worked “cooperatively”

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