Thomas Wentworth wrote:
Is it necessary to remove the batteries in the boat for winter storage? I'm
thinking: remove and store in garage ( cold there ). Leave in boat ( cold
there ).

So, why remove?


I leave the batteries on, but make sure they can get a trickle from
the solar panels. My 4 Trojan T105's got replaced after six years
because illness prevented me from checking all winter. However, I was
able to get them for $70 each from a golf cart dealer. If I thought I
wouldn't be able to check on the boat I wouldn't leave the batteries in.

The two starter batteries I replaced with AGM starting batteries,
Optima red tops bought at the Pep Boys for about $110 each. (Early
this summer I turned off the combiner because it was "chattering" and
one of the AGM's didn't get a charge for two months. It was still
starting the engine a few days ago.)