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 Lewis *"Yo solo sé que no sé nada." -Sócrates*
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