Since 2008, I have pulled the batteries in November, stored them in the garage but always have taken them and slow charged them in the RV for 2-3 non-freezing days in January, then back to the garage till reinstalled in March. This has worked well for these batteries so far.
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Dan
2016 Chevy LTZ - Duramax/Allison
2008 Eagle 30.5BHS
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