<div dir="ltr">Mac, my advice, just to be sure, check the refractometer against a float hydrometer on real battery acid from your home system, not just the the distilled water zero mark.</div><div class="gmail_extra"><br clear="all">
<div><div dir="ltr">Dan Fink<div>Buckville Energy</div><div>Otherpower</div><div>NABCEP / IREC / ISPQ accredited Continuing Education Providers<br>970.672.4342<br><br> </div></div></div>
<br><br><div class="gmail_quote">On Tue, Aug 12, 2014 at 9:01 PM, Mac Lewis <span dir="ltr"><<a href="mailto:maclewis1@gmail.com" target="_blank">maclewis1@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="ltr">Thanks for the responses everyone. I never considered that acid may have been added. I'll have to press him a little bit on that. He's definitely "old school" so I wouldn't be surprised if he tried this. Dan, I calibrated the refractometer, so I have confidence in its readings. When I say all over the place, we had 3 cells of specific gravity of 1.0, the rest ranged from 1.24-1.33. He is going to equalize again, but we will see if he added acid.<div>
<br></div><div>Thanks again.</div></div><div class="gmail_extra"><br><br><div class="gmail_quote"><div><div class="h5">On Tue, Aug 12, 2014 at 8:13 PM, William Miller <span dir="ltr"><<a href="mailto:william@millersolar.com" target="_blank">william@millersolar.com</a>></span> wrote:<br>
</div></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div class="h5"><div 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><div><div><br>On Aug 12, 2014, at 6:54 PM, Mac Lewis <<a href="mailto:maclewis1@gmail.com" target="_blank">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>
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<br></div></blockquote></div><br><br clear="all"><div class=""><div><br></div>-- <br><div><br></div><div><font color="#305A78" face="'times new roman', serif"><br></font></div><div><br></div>Mac Lewis<br><br><span style="font-family:'Times New Roman';font-size:medium;color:rgb(255,153,0)"><b><font face="Arial, Helvetica, sans-serif" size="3"><p align="left">
<font color="#000000" face="Verdana, Arial, Helvetica, sans-serif"><span style="font-size:small"><span style="font-family:arial;font-weight:normal;color:rgb(48,90,120)"><font face="'times new roman', serif">"Yo solo sé que no sé nada." </font><span style="font-weight:700;color:rgb(104,104,104)"><font face="'times new roman', serif">-Sócrates</font></span></span></span></font></p>
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