add 2nd battery
I have a 4 year old 5th wheel that I just bought and it has one battery that is AGM
12v 110am @c100 12v 100am C20 it gets charged from a solar panel and I assume from my truck. My question is, can...
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How old is the existing battery? If it's the original battery, 4 years old or potentially older, I wouldn't. Adding a new battery in parallel to an old battery is not a good idea. This is because the new battery will have a different charge capacity or internal resistance compared to the old battery, which can cause uneven discharge and charging rates between the batteries and/or it can lessen the life of the new battery as it tries to equalize them.
