Mac: Someone has added acid to the cells. I've had the same experience and found out the truth later on.
William Miller Solar > On Aug 12, 2014, at 6:54 PM, Mac Lewis <[email protected]> wrote: > > Hello wrenches, > > I just went on a service call for a new client. He had a bank of 4 year old > Interstate L16HCL batteries, 2 strings of 8, 48V system, 840Ahr. We went > through the batteries and got specific gravity on all of the cells > post-equalization. I was a bit surprised to see some very high numbers ie > over 1.32 for the specific gravities (higher than my refractometer goes). > The specific gravities were all over the place, but I haven't seen numbers > this high. I don't have a great explanation. He has a stacked 3648 VFX > Outback system, and the set-points were 58.8V Absorb for 2 hours, and 62V > Equalize for 2 hours. He has a decent amount of solar (about 3400W) and a > 1000W wind generator. > > Any ideas why the specific gravity is so high on some cells? Also, is there > anything wrong with having SG this high, post-equalization? For this very > standard battery, what settings do you go with (Bulk, Absorb, Float, Eq, and > times for Abs and Equalization). > > Thanks in advance > > > > -- > > > > Mac
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