<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div>Mac:</div><div><br></div><div>Someone has added acid to the cells. I've had the same experience and found out the truth later on. </div><div><br></div><div>William<br><br>Miller Solar</div><div><br>On Aug 12, 2014, at 6:54 PM, Mac Lewis <<a href="mailto:maclewis1@gmail.com">maclewis1@gmail.com</a>> wrote:<br><br></div><blockquote type="cite"><div><div dir="ltr">Hello wrenches,<div><br></div><div>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.</div>
<div><br></div><div>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).</div>
<div><br></div><div>Thanks in advance</div><div><br></div><div><br clear="all"><div><br></div>-- <br><div><br></div><div><font color="#305A78" face="'times new roman', serif"><br></font></div><div><br></div>Mac </div></div></div></blockquote></body></html>