On my motorhome I have 4 batteries under the hood. They are connected in parallel and are used for both the coach and truck at the same time. I have a solar panel and inverter too. I have a dead cell in one of the batteries and need to replace it. I also happen to have a couple of extra good batteries sitting around but of a different size. Question! Should all 4 batteries be the same size/amperage? Or, because they are wired in parallel can I mix sizes?
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