<div dir="auto">2.7 k ohms = about 37 C. Digi key or I can send you a few. <br clear="all"><div><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><br>William Miller<br>Miller Solar.com<br>805-438-5600<br><a href="http://www.millersolar.com">www.millersolar.com</a><br></div></div></div><div><br></div><div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sun, Nov 12, 2023 at 5:27 PM Roland - RES via RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org">re-wrenches@lists.re-wrenches.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="auto">Jerry,<div><br></div><div>I have an upcoming project where I will need to add the resister to eliminate and batt temp charging corrections. I have not done this before can you provide where I could find a twister to achieve this?</div><div><br></div><div>Mahalo,</div><div><br></div><div><br><div dir="ltr"><div dir="ltr"><span style="border-collapse:collapse;background-color:rgba(255,255,255,0)"><div dir="ltr" align="left" style="margin-left:0pt"><table style="border:none;border-collapse:collapse"><tbody><tr style="height:84pt"><td style="vertical-align:middle;padding:5pt;overflow:hidden"><p dir="ltr" style="line-height:1.38;text-align:center;margin-top:0pt;margin-bottom:0pt"><span style="vertical-align:baseline"><span style="border:none;display:inline-block;overflow:hidden;width:164px;height:80px"><img src="https://lh4.googleusercontent.com/R2pJqufzOLnyX7mZh5-xO1OEIH4lQB3r3iSLTQTEqvrIu-49s-fpYbAu3ULVxV-xeY78oSboKRb8RrrU5ZLCk5Mu4D-srDEsQrNBafl0FFwF4Yt6R3PmdIshOxSDcBolRWFLJYuVRIrXqZFlv9j-avA" width="164" height="80" style="margin-left:0px;margin-top:0px"></span></span></p></td><td style="vertical-align:top;padding:5pt;overflow:hidden"><p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="font-weight:700;vertical-align:baseline">Roland Shackelford</span></p><p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="vertical-align:baseline">President / Owner</span></p><p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="vertical-align:baseline">NABCEP PVIP #<span dir="ltr">091209-162</span></span></p><p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="vertical-align:baseline">Office <span dir="ltr">808.775.7410</span></span></p><p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="vertical-align:baseline">Mobile <span dir="ltr">808.938.9239</span></span></p><p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="font-style:italic;vertical-align:baseline">Power Solutions for Generations </span><a href="https://www.renewablenergy.com/" target="_blank"><span style="vertical-align:baseline">Renewable Energy Services, Inc.</span></a></p></td></tr></tbody></table></div></span></div><div dir="ltr"><span style="border-collapse:collapse;background-color:rgba(255,255,255,0)"><div><div><br></div><div><span style="border-collapse:collapse">" Where there is integrity, there will be trust. Where there is trust, there will be an atmosphere for success." - Sadhguru</span></div></div></span></div></div><div dir="ltr"><br><blockquote type="cite">On Nov 12, 2023, at 10:51 AM, Jerry Shafer 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="auto">Regarding the SI Inverters,for me it works best to eliminate the bat temp sensor and put in a resister set to be 75 degrees, this will prevent the charger over under charge issue.<div dir="auto">Fun times </div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sun, Nov 12, 2023, 12:36 PM William Miller via RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org" target="_blank">re-wrenches@lists.re-wrenches.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div lang="EN-US" link="blue" vlink="purple"><div><p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Verdana","sans-serif"">Friends:</span></p><p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Verdana","sans-serif""> </span></p><p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Verdana","sans-serif"">I am still working on getting the E-vaults to play nice with the Sunny Islands and Sunny Boys.</span></p><p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Verdana","sans-serif""> </span></p><p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Verdana","sans-serif"">With Open loop I was getting significant discrepancies in the reporting of SOC in the e-vaults versus that reported by the SI inverters. This discrepancy did not diminish over time. The discrepancy caused unacceptable charging and generator operations.</span></p><p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Verdana","sans-serif""> </span></p><p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Verdana","sans-serif"">I got Closed loop hooked up, but I found that every few days the SI inverters would shut down due to a battery over-voltage condition. I believe that when the e-vaults are near 100% SOC the BMS units increase the battery impedance which means any charging current applied will cause the voltage spike I have been seeing. I was able to measure these conditions myself on site, although they were very fleeting and required recording with the Fluke87 Min-Max function (love this meter!).</span></p><p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Verdana","sans-serif""> </span></p><p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Verdana","sans-serif"">I was able to extract log files from the Sunny Island primary inverter and perform some analysis. It appears when I turned on remote BMS on the SI (as part of the Closed loop protocol) it disabled the Frequency-Shift Power Control. This means the SI inverters have gone from having poor control over battery charging to having no control over battery charging.</span></p><p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Verdana","sans-serif""> </span></p><p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Verdana","sans-serif"">I have documented my research <a href="https://millersolar.com/MillerSolar/case_studies/36_SIFortress/36_SunnyIslandFortressIntegration.html#Inhibit" rel="noreferrer" target="_blank">here</a>. There is a table of contents to take you to the latest information. I appreciate pertinent comments any of you might have.</span></p><p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Verdana","sans-serif""> </span></p><p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Verdana","sans-serif"">By the way, if anyone has called SMA tech support for help on a Sunny Island system, you have likely been asked to extract log files, zip them up and send them off for review (and waited a long time for a reply). I am the kind of guy who does not like to wait for solutions and who likes to figure out things for himself. I have taught myself how to evaluate those log files. I will be posting a web page on the subject. In the meantime, if you are interested, two of my analysis Excel sheets are linked in the case study. I will be expanding on this and providing resources to any integrator that wants that knowledge.</span></p><p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Verdana","sans-serif""> </span></p><p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Verdana","sans-serif"">Thanks in advance for any insight. I hope I am wrong about this and I am just missing something. I also hope revealing my headaches will help someone someday…</span></p><p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Verdana","sans-serif""> </span></p><p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Verdana","sans-serif"">William</span></p><p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Verdana","sans-serif""> </span></p><p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Arial","sans-serif"">Miller Solar</span></p><p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Arial","sans-serif"">17395 Oak Road, Atascadero, CA 93422</span></p><p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Arial","sans-serif"">805-438-5600</span></p><p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Arial","sans-serif""><a href="http://www.millersolar.com/" rel="noreferrer" target="_blank">www.millersolar.com</a></span></p><p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Arial","sans-serif"">CA Lic. 773985</span></p><p class="MsoNormal"> </p><p class="MsoNormal"> </p></div></div>
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