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View Full Version : BEST way to charge deep cycle 12V batteries for longest life?


drjac
Apr 22, 2009, 03:37 PM
What is the best method of charging 12V deep cycle marine batteries to prolong life?
I have been using a 15 amp on board charger and a 15 amp trickle charge I have used for years on several boats. Now I have run through 7 batteries in a 5 battery system in 4 years and the dealer says my charging set up is all wrong, despite what the boat manufacturer/ charger manufacture says. They ar Ameristart Batteries which don't seem to exist on goggle to ask them directly how to charge there product.

Thank you for your time!
Dr Eric D Swanson:confused:

sathe1963
Apr 26, 2009, 09:07 AM
Your batteries may be on continuous charging. You should maintain discharging of the same periodically say once in a week at least to 75% to be drained. (continuous charging without any drain is also harmful for batteries)