Battery SOC Low - Voltage Normal
Hi All. I'm new here so go easy on me. I've Googled for hours but can't find any solid answers. My setup is in my signature. So here's my issue.... Whether plugged into shore power, running my ...
Forum Discussion
In my experience, with my four 6v GC-2's, it takes several days for a good surface charge to dissipate on its own. Checking resting OCV an hour, or even a day later will give a higher than actual reading. Moreover, higher top charge voltages (15+V) result in lower resting/ocv readings, even though SG readings improve.
There seems to be a sweet spot, where both SG and OCV's max/equalize out... in my case, in the 14.6-14.8Vabs (TC) range. So I find it best to do a good top/desulfation charge, in the 15+V range, followed by a "normal" 14.6-8v Abs charge. I notice this with EQ'ing, as well. The resulting individual OCV's go crazy, but then level/equalize out, once followed by a normal charge cycle.
The OP's % SOC monitor is clearly not reliable... SOC cannot change at the flick of a monitor switch. And no, checking OCV cannot be done while under ANY load, or it's simply not an OCV... OPEN CIRCUIT means just that. And the same load will have a different peukert effect at a different SOC. So, for a simple, basic indication of when to charge, OCV may be fine, but for trouble shooting, it is very unreliable.
There seems to be a sweet spot, where both SG and OCV's max/equalize out... in my case, in the 14.6-14.8Vabs (TC) range. So I find it best to do a good top/desulfation charge, in the 15+V range, followed by a "normal" 14.6-8v Abs charge. I notice this with EQ'ing, as well. The resulting individual OCV's go crazy, but then level/equalize out, once followed by a normal charge cycle.
The OP's % SOC monitor is clearly not reliable... SOC cannot change at the flick of a monitor switch. And no, checking OCV cannot be done while under ANY load, or it's simply not an OCV... OPEN CIRCUIT means just that. And the same load will have a different peukert effect at a different SOC. So, for a simple, basic indication of when to charge, OCV may be fine, but for trouble shooting, it is very unreliable.
