Capacity Testing and 20 HR Rating
I'm thinking about doing a capacity test on my four GC2's. They have a 20hr rating of 215Ah. One thing I'm curious about is how the 20hr rating would have been determined. Being 6v, would they h...
Forum Discussion
BFL13 wrote:
Looks like Bank B is taking more load than bank A, probably due to a slight imbalance? I don't know the spec SG for 50% on those batts, but you seem to be pretty close to full rated capacity on your bank at the 20 hr rate according to those results IMO.
Can't see anything there that relates to the 90-100% recharge amps thing you observed. Maybe the imbalance has one bank keeping the amps up at the end when they would be tapering otherwise?
Yes, I was surprised to see A1 and A2 doing so well at the lower soc, and B2 seemingly taking more than its share of the load? I wonder if it has anything to do with the fact B2 is connected to the Positive Lead?
That rising amps thing happened again yesterday (friday); and at much cooler ambient temps. I charged from 6pm 'til 2am, after the C test (thursday), and brought the bank to 8.8a @ 14.78v. Friday morning OCV was a little over 13v, and I charged from 8:30am 'til 2pm. Amps tapered quickly to about 6.5a, then slowly tapered to (and appeared to plateau at) 6.1a. But then amps began to rise a little, and rose to 6.5a @ 14.79v, by 2pm. That's when I shut things down.
By 6:30pm, OCV was at 13.02v. By 8:45pm, 12.93v. This morning, at 6am, 12.8v, and now (11:30am) still 12.8v.
