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
landyacht318 wrote:
Okay the marine layer ( low clouds) has moved in ending the EQ session 30 minutes after last report.
SG at 1.290 on all three with the battery now 11 degrees above ambient, and the innermost cell being the hottest adding 12 whereas the outermost was adding 7, and all coming within a .001 of each other when compensated.
It was taking 4 amps at 16.02v before the clouds moved in. Bubbling and gurgling up a storm.
This was the longest EQ session I have done by 90 minutes or so.
Obviously 14.7 and 14.8 are way too low for this battery in these temperatures.
About to reset ABSV and Float. Forecast is 62f low, 64f Highs through Thursday, which likely means lots of marine layer and not enough sunlight to get to or hold high 14's, and more Schumacher assist.
If the forecast holds true, then next Sunday's dipping might not add much data to better pinpoint solar voltage setpoints.
As MexicanWanderer said, 16.0V on these 12V batteries to really get them completely equalized. And it takes some time to get it done. T-1275s, Screwy 31's, and even 27's. Something about the design causes them to hang on to the sulfur and not put it back in chemical solution... they have a memory of sorts, that is only overcome by brute force and upping the voltage to get 'er done to get the SG up where it truly belongs.
I'm still of the impression that you need more voltage daily at bulk charge, get them at 15.3V like the mfg asks for, and taper charge, to hold these batteries up from sagging voltage. And Equalize weekly. instead of 14 days, perhaps.
