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...
Forum Discussion
BFL,
Last tuesday, the bank was resting at 12.71v. I charged with the Peak for about half an hour at it's 4a setting, until voltage rose to 15.2v. I switched it to it's 10a setting and continued until voltage rose to 15.4v. I then switched over to the pm4b and charged until 2.3a @ 14.86v, at the 15 minute mark, then tweaked Vabs to 14.6v and 1.5a, and took the batts down to 1a; which took quite some time.
I don't see how batts that were resting at 12.71v, and then charged for several hours, even at less than optimal voltges, can slowly drop to 12.84v over 4 days, and then suddenly drop from 12.84v to 12.54v in just two days. My intention was to do sort of a high voltage (albeit short term) float, which is why I used 14.6v. If anything, all this extra charging should have helped sustain a good ocv, no?
Last tuesday, the bank was resting at 12.71v. I charged with the Peak for about half an hour at it's 4a setting, until voltage rose to 15.2v. I switched it to it's 10a setting and continued until voltage rose to 15.4v. I then switched over to the pm4b and charged until 2.3a @ 14.86v, at the 15 minute mark, then tweaked Vabs to 14.6v and 1.5a, and took the batts down to 1a; which took quite some time.
I don't see how batts that were resting at 12.71v, and then charged for several hours, even at less than optimal voltges, can slowly drop to 12.84v over 4 days, and then suddenly drop from 12.84v to 12.54v in just two days. My intention was to do sort of a high voltage (albeit short term) float, which is why I used 14.6v. If anything, all this extra charging should have helped sustain a good ocv, no?
