12volt deepcell battery readout on multimetre
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Topic: 12volt deepcell battery readout on multimetre
Posted By: ron_whitt
Subject: 12volt deepcell battery readout on multimetre
Date Posted: 06 Dec 2020 at 7:23am
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What should a deep cell 12volt battery read on a multimetre if fully charged and how low should you let it get? ------------- Ron & Shirley 2020 Tacoma 2012 177 rpod |
Replies:
Posted By: offgrid
Date Posted: 06 Dec 2020 at 9:20am
This should be close. But, you have to allow the battery to recover to its open circuit voltage (no charging or discharging) for at least 30 minutes before measuring it. Unless in an emergency, its best not to go below about 50% state of charge (around 12V) if you want to get long life out of your batteries. ------------- 1994 Chinook Concourse 1995 RV6A Experimental Aircraft 2015 Rpod 179 - sold |
Posted By: jato
Date Posted: 06 Dec 2020 at 4:35pm
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When boondocking we change ours out at 12.2 v. or 60% S.O.C. Since winterizing our 177, batteries were pulled and moved to our unheated garage on the concrete floor. Both batteries got a 24 - 30 hour 2 amp trickle charge on October 24 here in northern Michigan. Just checked them yesterday, 6 weeks after receiving the charge; they read 12.64 v and 12.61 v respectively. Not too bad for a pair of nearly 10 year old 12 volt Interstate, group size 24, deep cycles. ------------- 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." |
Posted By: Colt
Date Posted: 07 Dec 2020 at 10:44pm
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There is a little variation because of chemistry and design, but expect 12.7 +/- 0.1V. AGM batteries are usually 12.8V at 100%, resting. ------------- John '16 R-Pod 180 |