<div dir="ltr">Steve, thanks for the call. I am using voltages, rather than SOC to start/stop the generator. I also just reduced the battery resistance to 0 based on your recommendation.<div><br></div><div>Jay, </div><div>There is a temp sensor. The batteries only got to about 32deg C after 14 hours of charging.</div><div>I got the 7 hours of absorb time based on the equation capacity*.42/charge current. 890AH*.42/50A = ~7.5 hours (I used 50A rather than 75A, since I figured it would be unlikely that the solar would often be able to sustain 75A for very long)</div><div>The 5% is not adjustable. I think the adjustment is in the battery capacity. Steve just corrected me on this though, as he mentioned it is actually 2%. </div><div><br></div><div>Cheers,</div><div>Dave</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Fri, Oct 4, 2024 at 11:01 AM Jay <<a href="mailto:jay.peltz@gmail.com">jay.peltz@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="auto"><div dir="ltr"></div><div dir="ltr">Hi Dave</div><div dir="ltr"><br></div><div dir="ltr">I bet there is no way to install a temp sensor?</div><div dir="ltr"><br></div><div dir="ltr">Question about the 7 hrs absorb time. Where did you come up with that figure. </div><div dir="ltr"><br></div><div dir="ltr">Is the 5% adjustable or the adjustment is in the battery capacity?</div><div dir="ltr"><br></div><div dir="ltr">Thx</div><div dir="ltr">Jay</div><div dir="ltr"><br></div><div dir="ltr"><br></div><div dir="ltr"><br><blockquote type="cite">On Oct 4, 2024, at 8:30 AM, Dave Tedeyan via RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org" target="_blank">re-wrenches@lists.re-wrenches.org</a>> wrote:<br><br></blockquote></div><blockquote type="cite"><div dir="ltr"><div dir="ltr">Hi All, <div><br></div><div>I have inherited and done some work on an off-grid system with a Sol-Ark 8k inverter and now has a new set of 16 Rolls S6 L16-HC batteries (only about a month old). There is only 3.9kw of solar, and there is a 12kw generator. </div><div><br></div><div>First of all, thanks to Steve for putting out that webinar a little while ago on how to program a Sol-Ark with lead acid batteries! I followed that for the programming of this inverter.<br clear="all"><div><br></div><div>Recently, the generator kicked on when it should. But it never turned itself off. I had to go into the battery settings and turn off grid and gen charging to get the generator to turn off. From looking at the monitoring, even once the batteries were full, they were still accepting over 40A of current. A few hours later, the batteries were accepting almost 50A of current. </div><div><br></div><div>The battery bank has a capacity of 890AH, but based on the FLA recommendations I set the capacity to 70% of that, or 650AH so that it absorbs longer. Based on the Sol-Ark programming, it will run the generator until the batteries are accepting 5% of that, or 32.5A. It seems that since the system never got down to that little amount of current, it never turned off the generator and never stopped charging. I had the customer check the water level and they said it was low, but not below the level of the plates. </div><div><br></div><div>Does anyone know why the batteries might have been accepting so much current even when fully charged? And in order to get the final amps that the inverter is looking for to turn off the generator, I would need to set the capacity up to about 780AH or about 90% of the rated capacity. Is upping the capacity the recommended action to prevent this from happening in the future? </div><div><br></div><div>I also have a follow up question. Being that there is not a ton of solar here, the recommendation for a full absorb every few days ends up being about 7 hours of absorb time. I am wondering if there is a way to force the inverter to do an EQ cycle (although we are really just using the EQ function on the inverter to get a full absorb cycle every few days) when we know it will be a sunny day? I would also like to be able to start an EQ cycle and also start the generator to give a good top off. It seems that you can choose the EQ frequency, but you don't know exactly when it will try to EQ.</div><div><br></div><div>Thanks in advance!</div><div>Cheers,</div><div>Dave</div><span class="gmail_signature_prefix">-- </span><br><div dir="ltr" class="gmail_signature"><div dir="ltr"><br style="color:rgb(34,34,34)"><div dir="ltr" style="color:rgb(34,34,34)"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"></div></div></div><div dir="ltr"><table cellpadding="0" cellspacing="0" style="border-spacing:0px;border-collapse:collapse;color:rgb(68,68,68);width:525px;font-size:11pt;font-family:Arial,sans-serif"><tbody><tr><td width="125" valign="top" rowspan="6" style="padding:0px 10px 0px 0px;font-size:10pt;border-right:1px solid rgb(236,189,0);width:125px;vertical-align:top"><a href="https://www.sungineersolar.com/" style="color:rgb(51,122,183);background-color:transparent" target="_blank"><img border="0" alt="Logo" width="105" src="https://sungineersolar.com/wp-content/uploads/2019/08/Logo-Image-Only-1.png" style="border: 0px; vertical-align: middle; width: 105px; height: auto;"></a></td><td style="padding:0px 0px 0px 10px"><table cellpadding="0" cellspacing="0" style="border-spacing:0px;border-collapse:collapse;background-color:transparent"><tbody><tr><td valign="top" style="padding:0px 0px 5px 10px;width:400px;vertical-align:top"><span style="color:rgb(236,189,0);font-size:11pt;font-weight:700">Dave Tedeyan, P.E.<br></span><span style="font-size:11pt;font-weight:700"><font color="#ecbd00">Owner | Sungineer Solar</font><br></span></td></tr><tr><td valign="top" style="padding:5px 0px 5px 10px;font-size:10pt;vertical-align:top;line-height:17px"><span style="color:rgb(236,189,0)"><span style="font-weight:700">p: </span></span><span style="font-size:10pt;color:rgb(0,0,0)">he | him | his</span><span style="color:rgb(236,189,0)"><span style="font-weight:700"><br>a: </span></span><span style="font-size:10pt;color:rgb(0,0,0)">1653 Slaterville Rd.</span> <span style="font-size:10pt;color:rgb(0,0,0)">| Ithaca, NY 14850</span><br><span style="color:rgb(236,189,0)"><span style="font-weight:700">w:</span></span><a href="http://www.sungineersolar.com/" rel="noopener" style="color:rgb(51,122,183);background-color:transparent" target="_blank"><span style="font-size:10pt;color:rgb(0,0,0)"> www.sungineersolar.com</span></a><br><span style="color:rgb(236,189,0)"><span style="font-weight:700">c:</span></span><span style="font-size:10pt;color:rgb(0,0,0)"> (607) 270-0370</span></td></tr></tbody></table></td></tr></tbody></table></div></div></div></div></div></div></div>
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