DO NOT leave them plugged in all winter. I know of none of the chargers that
absolutely will not overcharge. If the water gets low it will keep charging
and burn up your batteries or worse yet catch fire. I have left them plugged
in ONLY with a timer in between the charger and wall plug. I leave it set to
come on for 30 minutes at 8 a.m and and again at 8 p.m. Have not had the
water to go down any doing it that way and not using the boat for 2 months.
I had a Pro Mariner 3 bank and Delco Voyagers (sealed type) and never had a
problem but did have the problem with batteries that you had to check the
water. Had the Delcos on for 5 years and were still going strong till I
totalled the boat in a storm.

"Charles B. Summers" charles-summers@(comcast)(dot)(net) wrote in message
...
Earlier this year, I installed an on-board charger on my boat to charge
the
starting and trolling battery.

Question: Is is ok to leave it plugged in all winter, even if I'm not
planning on using the boat until about the first of March? Or, should I
only
charge it every once in awhile?

The charger I have is one of them that suppose to continually condition
the
batteries, but I cannot find the owners manual to see what it says about
storage.

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