Group 27 AGM mid life performance report
My 90AH Northstar AGM battery is now 38 months old, and has accumulated ~465 deep cycles. When I cycle it, generally I consume 35 to 65AH nightly, average about low 40's Since June of 2015 it ...
Forum Discussion
BFL13 wrote:landyacht318 wrote:
While I ignore my % full screen and use the AH from full instead, I really do not trust that figure to any high degree, unless I see when it starts counting backwards. appears I can discharge several AH before it starts counting.
Right now it is saying 100% and 0Ah from dull, but is accepting 1.6 amps at 14.7v.
So it is not full by any means, and I will reset it tonight and lower the 'charge efficiency' and hope it is closer tomorrow.
Ok second day at recharging my two AGMs and after leaving them on the adjusted Float over night, they are now accepting 0.1 amp (0.05 each) at 14.3v (about 13.7 at 77F) Tri says AH restored is now 78.3 so getting closer to the 80AH removed.
Watching paint dry! :(
I see LY jacked his voltage back up in this situation to see if they accepted more amps, and if not any more than at his Float, he declared "Full." Maybe I should try that later if amps don't fall to zero like Phil's do.
Reason I care is they will go on a Float after this for a long time and it says somewhere to get them truly full before putting them on a float. Problem is knowing when they are truly full enough to do that.
When they are 0.5% amperage of Ah ratings on the battery, at 14.4v on a surplus acid AGM battery, they are fully charged and ready for float charging, per DEKA.
