List: trawlers@lists.trawlering.com
From: Scott H.E. Welch
Re: T&T: battery storage
Mon, Apr 16, 2007 11:43 PM
"Robin" writes:
>...Now I'm getting e-mails criticizing my post saying in effect batteries
>should be protected from extreme cold
Well, let me first say that I am neither a chemist nor a battery engineer.
But I worked for 5 years on a boat in the arctic, and I also maintained 4
generators and an industrial-size Bombardier snowmobile powered by a Chrysler
318. I can state state unequivocal that you can leave a fully charged wet
lead-acid battery out in the cold (like -60F cold) for six months at a time
with no noticeable ill effects. Usually we didn't even have to charge them in
the spring. The boat had a pair of 8-D Surettes for each engine (Volvo TMP-40
diesels).
Your mileage may vary, etc. etc. etc., but the long and short of it is that
winter in Michigan is not going to hurt your batteries. Think of it this way:
it's a darn sight warmer than North Dakota, and last I checked the folks in
ND still get their cars to start.
Just as an aside, you you do have to watch out for is anything filled with
water. The plumbing, of course. But there are less obvious things. For
example, closed seacocks often have water trapped in the barrel. Drain lines
for your fridge. Buckets in the lazarette. Cans of pop. Bottles of Evian. The
pump in your toilet. The black water tank pump. All of these things will
burst, and of course you won't notice until it's waaayyyy too late.
Of course, if you do elect to use heated storage, you still need to
winterize. If you read the fine print, I'll bet dollars to donuts there is an
"act of god" clause that absolves the marina from damages should the heat go
off. All it will take is a good ice storm with the power off for a few days
and the temperature could easily drop below freezing.
Scott Welch
Product Manager, FirstClass Group
"If we continue to take an eye for an eye, then surely the whole world will
go blind." - Gandhi