Ken
As proof of what you say, this will be the seventh (7) winter our Great
Northern Group 27 batteries will have spent on the boat. As you said,
get a good charge before being disconnected. Mine get the occasional
boost through the winter as I visit the boat occasionally but I don't
think it matters....just gives me an excuse to go to the boat and hang
out and have a beer.
And at 55 lbs. per battery, why would you want to lift those off the
boat and move them for no logical reason?
Rob Abbott
AZURA
C&C 32 -84
Halifax, N.S.
On 2014/11/02 12:21 PM, Ken Heaton via CnC-List wrote:
Hi Rich,and all,
"I understand wet cell batteries lose their charge if left in the
cold" This is pretty much exactly backward.
Wet storage batteries hold their charge better, longer, the colder it
is. Fully charge them, pull one cable off each battery so there is no
possibility of discharge through ship's systems and leave them where
they are.
Top them up with the charger in the spring when it is warm and you're
good to go. They won't need much.
Supporting article: http://www.pbase.com/mainecruising/self_discharge
or this one: http://jgdarden.com/batteryfaq/carfaq13.htm
Quote: "Store in a cold dry place, but not so that it will freeze..."
Which, if you have a fully charged battery is about 77 degrees below
zero...
Approximate
State-of-Charge
(SoC)
Approximate
Depth-of-Discharge
(DoD)
Approximate Electrolyte Freeze Point
100%
0%
-77°F
(-67°C)
75%
25%
-35°F
(-37°C)
Ken H.
On 2 November 2014 09:56, Rich Winslow via CnC-List
<cnc-list@cnc-list.com <mailto:cnc-list@cnc-list.com>> wrote:
Rich Winslow
I removed batteries and rested them on 2 x 4's in my heated
basement- I understand wet cell batteries lose their charge if
left in the cold, and when discharged, they can freeze.
-----Original Message-----
From: cnc-list-request <cnc-list-requ...@cnc-list.com
<mailto:cnc-list-requ...@cnc-list.com>>
To: cnc-list <cnc-list@cnc-list.com <mailto:cnc-list@cnc-list.com>>
Sent: Sat, Nov 1, 2014 12:16 pm
Subject: CnC-List Digest, Vol 106, Issue 2
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