Very Low OCV on Full Batts???
I've been seeing lower than usual resting ocv this winter, compared to last. Figured it was either wear and tear, too high a charging voltage, or a parasitic draw. So I tried throwing a lower vol...
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I have been using this chart to get into the ball park of the State OF CHARGE using a DC multimeter when camping off the power grid.
This is showing 12.5VDC is close to 90% charge state.
This may be apples and oranges for your test but in my case this is what I use to get me in the ball park. I will run my battery bank down to 12.0VDC as indicated on my BATTERY MONITOR METER PANEL which is close to being at 50% charge state and that is when I start re-charging using my 2KW Generator connected to the trailer shore power cable using an RV30A to 15A long adapter which fires up my PD9260C 60AMP converter/charger unit for my 255AH battery bank.
My batteries seem to like this procedure as I get pretty much full performance of the batteries again after approximately three hours of generator run time. My GP24 Interstate Batteries were installed in 2008.
After I do some 12-14 50% to 90% state of charge cycles I will then run my PD9260C Converter/Charger for around 12 hours to get a full 100% charge state on my 255AH Battery bank.
I have no need to be absolute on my readings - ball park is close enough for my purposes...
Roy Ken
This is showing 12.5VDC is close to 90% charge state.
This may be apples and oranges for your test but in my case this is what I use to get me in the ball park. I will run my battery bank down to 12.0VDC as indicated on my BATTERY MONITOR METER PANEL which is close to being at 50% charge state and that is when I start re-charging using my 2KW Generator connected to the trailer shore power cable using an RV30A to 15A long adapter which fires up my PD9260C 60AMP converter/charger unit for my 255AH battery bank.
My batteries seem to like this procedure as I get pretty much full performance of the batteries again after approximately three hours of generator run time. My GP24 Interstate Batteries were installed in 2008.
After I do some 12-14 50% to 90% state of charge cycles I will then run my PD9260C Converter/Charger for around 12 hours to get a full 100% charge state on my 255AH Battery bank.
I have no need to be absolute on my readings - ball park is close enough for my purposes...
Roy Ken
