+1 for Ken
In my experience Ken is right on the money. I never store my batteries inside during the winter. I put them up fully charged and disconnected and they are always near fully charged in the spring. They also last longer than their warranties. Been doing that for 40 years. There is also of course science to back up that statement. It is a waste of time and significant energy to remove your batteries from the boat for the winter. From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Ken Heaton via CnC-List Sent: Sunday, November 02, 2014 11:21 AM To: Rich Winslow; cnc-list Subject: Re: Stus-List Winterizing Atomic 4 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> 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> To: cnc-list <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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