My batteries are Group 27's, deep cycle, made by Great Northern
Batteries purchased in April 2009 and have seen 10 sailing seasons
now.....one get used almost every day during the sailing season....I
alternate use from one day to another to even their use. They have never
been off the boat since purchased.
My boat gets shrink wrapped with an access door so I can go aboard
easily......however, last year on Xmas day, we had a big wind storm that
somehow blew my door off never to be found....I had extra shrink wrap so
I cut apiece to cover the opening and Tuck taped in place......In
November, the batteries were fully charged with topped up electrolyte
with everything disconnected. I did not go aboard until the first week
of April.
In April, I tested the batteries....one was 12.48V, the second was
12.52V.....a little discharge but that is to be expected. If your
batteries can hold their charge, I see no reason to remove very heavy
batteries where their is also the risk of an accident occurring moving
them. I recall weighing one and it was something over 50 lbs. which is
not an insignificant weight to be moving around even if the battery has
a plastic handle to carry it.
I really should be thinking about replacing them but they still hold
their charge.
Rob Abbott
AZURA
C&C 32 - #277
Halifax, N.S.
On 2018-12-02 8:26 a.m., Ken Heaton via CnC-List wrote:
Stu has an article linked on the front page of the Photo Album:
Surrette Battery Co. Ltd. Bulletin #506 - Winter Storage
http://www.cncphotoalbum.com/doityourself/batteries/batteries.htm
Batteries stored below 59 F. self discharge _very_ slowly, the colder
the storage temperature, the slower. Start with them fully charged and
everything shut off and better yet a cable disconnected.
Ken H.
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