Cold Weather AGM Battery Question

[IP37Imagine]

Our boat is stored on hard in northern New England with batteries connected to 140 watt solar Panel. Is this prudent or should batteries be removed & stored indoors during winter. Thank's

[btrayfors]

Assuming your solar panels are connected to a good controller, the setup is probably OK.

However, because AGM batteries have a very low self-discharge rate -- even more so in cold weather -- and if they're fully charged to begin with, they'd probably be fine just sitting in the boat disconnected.

Bill