Have not read through all the replies, and have no intention to do so.
Are all your batteries same type. If they are you can parallel them and keep them charged.
How many?
What Size?
What Type?
If it is a mix of AGM, FLA, starting and deep cycle you have some incompatibility. However you can find a happy medium. Float range between the types is 13.2 to 13.6 volts. You would need to shoot for 13.4. Not perfect but better than dead and doing nothing.
Are all your batteries same type. If they are you can parallel them and keep them charged.
How many?
What Size?
What Type?
If it is a mix of AGM, FLA, starting and deep cycle you have some incompatibility. However you can find a happy medium. Float range between the types is 13.2 to 13.6 volts. You would need to shoot for 13.4. Not perfect but better than dead and doing nothing.
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