Is there a correct battery voltage chart?
The battery voltage charts are all over the board..Is there a correct one out there for regular deep cycle/agm and lithium? I came across this one..How accurate is Nicks test?
Forum Discussion
I had two different AGMs, one an 8D and another was a 27. Both had similar charts for Voc vs SOC. A fairly wide band as seen here (scroll down and to the right)
http://www.wegosolar.com/products.php?product=SKR%252d125AGM-Stark-AGM-12V-Solar-Battery-Sealed-125A
It turned out with my AGMs, that 12.4v was about 50% as confirmed with Trimetric AH counter. They rested full (after the 0.5a/100AH target and a few days later) at 13.0V
So my AGMs were in the middle of that band on that graph, but I had to learn that using the Trimetric. No other way to tell.
My flooded 6s and 27s are more like the Trojan graph, also confirmed by Trimetric. So it was easy for me, just add 0.3 to the Flooded voltages to get the AGM voltages for estimating.
I found it took a couple of days for the surface charge to go away after a recharge so the Flooded batts were 12.7ish. You can knock the surface charge off in a hurry if you want, but then it is hard to know if you overdid it, so your resting voltage after that could be too low.
http://www.wegosolar.com/products.php?product=SKR%252d125AGM-Stark-AGM-12V-Solar-Battery-Sealed-125A
It turned out with my AGMs, that 12.4v was about 50% as confirmed with Trimetric AH counter. They rested full (after the 0.5a/100AH target and a few days later) at 13.0V
So my AGMs were in the middle of that band on that graph, but I had to learn that using the Trimetric. No other way to tell.
My flooded 6s and 27s are more like the Trojan graph, also confirmed by Trimetric. So it was easy for me, just add 0.3 to the Flooded voltages to get the AGM voltages for estimating.
I found it took a couple of days for the surface charge to go away after a recharge so the Flooded batts were 12.7ish. You can knock the surface charge off in a hurry if you want, but then it is hard to know if you overdid it, so your resting voltage after that could be too low.
