Battery Longevity

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   The two batteries I own were last charged with a 2 amp trickle charger October 30-November 1.  So here we are 5 months and a week later and the oldest one (12v Interstate, group size 24, deep cycle, purchased 4/2011) reads 12.32v.  The new one (Trojan T-1275 purchased 8/2021) reads 12.41v.  They have remained in the same location all winter sitting directly on the concrete in an unheated garage in northern Michigan.  Today's temp is 33 with light snow.  Guess batteries are good for another season of boondocking without solar or generator assist.

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jato Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 23 Feb 2012 Location: Kewadin, MI Online Status: Offline Posts: 3325	Post Options Post Reply Quote jato Report Post Quote Reply Topic: Battery Longevity Posted: 08 Apr 2022 at 12:53pm
	The two batteries I own were last charged with a 2 amp trickle charger October 30-November 1. So here we are 5 months and a week later and the oldest one (12v Interstate, group size 24, deep cycle, purchased 4/2011) reads 12.32v. The new one (Trojan T-1275 purchased 8/2021) reads 12.41v. They have remained in the same location all winter sitting directly on the concrete in an unheated garage in northern Michigan. Today's temp is 33 with light snow. Guess batteries are good for another season of boondocking without solar or generator assist.
	God's pod '11 model 177 '17 Ford F-150 4WD 3.5 Ecoboost Jim and Diane by beautiful Torch Lake "...and you will know the Truth and the Truth will set you free."

offgrid Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 23 Jul 2018 Online Status: Offline Posts: 5290	Post Options Post Reply Quote offgrid Report Post Quote Reply Posted: 09 Apr 2022 at 3:47am
	Good for you Jato. Contrary to the old incorrect tale about batteries and cold concrete, that nice cold garage floor is good for the batteries as long as their charge is maintained so they don't freeze. If you use the rule of thumb that corrosion rates double with every 10C temp increase, you are probably getting somewhere around 1/4 the internal battery corrosion relative to say someone living in FL or AZ. So a battery that only lasts 4 years in a hot climate might last 16 years for you. Keep going with your experiment let's see what happens.
	1994 Chinook Concourse 1995 RV6A Experimental Aircraft 2015 Rpod 179 - sold