My Screwy 31
First off let me say I am not stressing over this. It's just a battery, it is only money, it is meeting my overnight needs, but it is displaying strange behavior, and I am curious as to why. So th...
Forum Discussion
Next day close to noon.
The 31 Battery saw no loads overnight and voltage had dropped to 12.7x something as of 3 in the morning. Which surprised me a bit as previously with the lower electrolyte levels, the resting voltage stayed higher longer after an EQ cycle when resting overnight. 13 volts 12 hours later IIRC, compared to 12.7X volts, but last night temps dropped into the mid to high 50's.
Shortly after first light it was already in 'float' requiring 0.5 amps to hold 15.1v.
I just checked SG. 1.275 on the 3 easily accessible cells. ~ 1.278 on the bulb with a subtract 3 on the thermometer. The cells are overfilled, being about 3mm over the bottom of the split rings. Doooh!
I don't know how many amp hours I removed from the Northstar AGM-27 since beginning the eq cycle yesterday, but it was touching the 11.9v range under a 11 amp load at about midnight. I was not being frugal with my consumption.
Right now my Schumacher is feeding only it 25.4 amps, and my Solar is feeding only it, 12.7 amps, which I think is a respectable charge rate and should make this AGM happy after what I am estimating was a DOD to 40 to 45%.
The Schumacher has contributed 9.57 amp hours so far and the voltage is only at 13.2v at this point as it gobbles up the current.
So far I am happy with the SG levels after refilling, and will see how the voltage holds tonight.
Any input on my hypothesis that perhaps higher ,less dense electrolyte levels might allow more sulfate to be redissolved into it from the plates?
Shining a powerful flashlight into the cells, there appears to be less junk on the visible portions of the plates today.
The 31 Battery saw no loads overnight and voltage had dropped to 12.7x something as of 3 in the morning. Which surprised me a bit as previously with the lower electrolyte levels, the resting voltage stayed higher longer after an EQ cycle when resting overnight. 13 volts 12 hours later IIRC, compared to 12.7X volts, but last night temps dropped into the mid to high 50's.
Shortly after first light it was already in 'float' requiring 0.5 amps to hold 15.1v.
I just checked SG. 1.275 on the 3 easily accessible cells. ~ 1.278 on the bulb with a subtract 3 on the thermometer. The cells are overfilled, being about 3mm over the bottom of the split rings. Doooh!
I don't know how many amp hours I removed from the Northstar AGM-27 since beginning the eq cycle yesterday, but it was touching the 11.9v range under a 11 amp load at about midnight. I was not being frugal with my consumption.
Right now my Schumacher is feeding only it 25.4 amps, and my Solar is feeding only it, 12.7 amps, which I think is a respectable charge rate and should make this AGM happy after what I am estimating was a DOD to 40 to 45%.
The Schumacher has contributed 9.57 amp hours so far and the voltage is only at 13.2v at this point as it gobbles up the current.
So far I am happy with the SG levels after refilling, and will see how the voltage holds tonight.
Any input on my hypothesis that perhaps higher ,less dense electrolyte levels might allow more sulfate to be redissolved into it from the plates?
Shining a powerful flashlight into the cells, there appears to be less junk on the visible portions of the plates today.
