I mostly charge the batteries at 2 to 10 amp overnight once when the weather changes. Seems to help with the efficiency loss as lead acid loses capacity the colder the ambient temperature is. Especially if they are outside and we get those 0 and below nights. If we have an extended cold snap probably do it again during that time.


Keeping lead acids at float levels really extends their lives. I seen standard auto batteries last 10 to 11 years if they are kept fully charged.

I think my father in law had a lawnmower battery last 15 years as we trickle charge them all winter.

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