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Old 02-05-2016, 07:33 PM   #15
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An older, lower capacity battery will not suck life out of a newer one in a parallel system.

Old and new batteries all rest at 12.6 volts, so no current is going to move between them.

A used battery may have only 1/2 the capacity of a new one, but it along with a new one, will add to the total capacity.

On the other hand a bad battery could drag down the good ones. So if using a mix, just keep an eye on the older ones condition.

Keep in mind that anytime your BIRD kicks in you are combining a house bank with a chassis bank.

Most of us don't change all the batteries ( chassis, house ) at the same time. We certainly don't use the same type.

You should not change a 6 volt battery in a series set. Change both and save the good one for the next bad one.

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Old 02-06-2016, 08:56 AM   #16
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Welcome to the solar fan club Jeremy!! Once you nail down your system to match your needs, it is a pretty awesome thing!!

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