Posts: 791
Location: North Central IL USA | stdevos - 11/9/2018 3:28 PM
I left mine in the boat one winter and occasionally plugged in onboard charger. In the spring found batteries dead and onboard charger swollen and cracked. Probably just a crappy charger (bargain cave variety), but now I pull everything out. Onboard charger goes in the basement and 3 batteries get rotated on battery tender in the garage.
Man, that's a lot of unnecessary work. Just get a quality onboard charger and be done with it. Make sure the batteries are topped off with water before you put the boat to bed for the winter.
Edited by gregk9 11/9/2018 6:01 PM
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