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westcottlo avatar image
westcottlo asked

Winter Battery Storage

I have a new electric pontoon boat with four Victron deep cycle AGM batteries (12v 110Ah). I plan to store it on a lift this winter (with a water de-icer) in a northern climate (SE Michigan). Is it okay to leave the batteries on the boat rather than remove them? If so, should I leave the charger connected thru the winter, and should the batteries / boxes be covered to protect them from the elements? Thanks.

AGM Battery
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2 Answers
Daniël Boekel (Victron Energy Staff) avatar image
Daniël Boekel (Victron Energy Staff) answered ·

Hi @WestcottLO

A fully charged lead-acid battery should be able to handle -20 degrees C without any problems.

Best to completely disconnect the batteries so nothing can draw a (small) load and discharge the batteries.

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westcottlo answered ·

Thanks, Daniel, that's very helpful!

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