2.7 k ohms = about 37 C. Digi key or I can send you a few. William Miller Miller Solar.com 805-438-5600 www.millersolar.com
On Sun, Nov 12, 2023 at 5:27 PM Roland - RES via RE-wrenches < re-wrenches@lists.re-wrenches.org> wrote: > Jerry, > > 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? > > Mahalo, > > > Roland Shackelford > > President / Owner > > NABCEP PVIP #091209-162 > > Office 808.775.7410 > > Mobile 808.938.9239 > > Power Solutions for Generations Renewable Energy Services, Inc. > <https://www.renewablenergy.com/> > > " Where there is integrity, there will be trust. Where there is trust, > there will be an atmosphere for success." - Sadhguru > > On Nov 12, 2023, at 10:51 AM, Jerry Shafer via RE-wrenches < > re-wrenches@lists.re-wrenches.org> wrote: > > > 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. > Fun times > > On Sun, Nov 12, 2023, 12:36 PM William Miller via RE-wrenches < > re-wrenches@lists.re-wrenches.org> wrote: > >> Friends: >> >> >> >> I am still working on getting the E-vaults to play nice with the Sunny >> Islands and Sunny Boys. >> >> >> >> 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. >> >> >> >> 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!). >> >> >> >> 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. >> >> >> >> I have documented my research here >> <https://millersolar.com/MillerSolar/case_studies/36_SIFortress/36_SunnyIslandFortressIntegration.html#Inhibit>. >> There is a table of contents to take you to the latest information. I >> appreciate pertinent comments any of you might have. >> >> >> >> 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. >> >> >> >> 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… >> >> >> >> William >> >> >> >> Miller Solar >> >> 17395 Oak Road, Atascadero, CA 93422 >> >> 805-438-5600 >> >> www.millersolar.com >> >> CA Lic. 773985 >> >> >> >> >> _______________________________________________ >> List sponsored by Redwood Alliance >> >> Pay optional member dues here: http://re-wrenches.org >> >> List Address: RE-wrenches@lists.re-wrenches.org >> >> Change listserver email address & settings: >> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >> >> There are two list archives for searching. When one doesn't work, try the >> other: >> https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/ >> http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org >> >> List rules & etiquette: >> http://www.re-wrenches.org/etiquette.htm >> >> Check out or update participant bios: >> http://www.members.re-wrenches.org >> >> _______________________________________________ > List sponsored by Redwood Alliance > > Pay optional member dues here: http://re-wrenches.org > > List Address: RE-wrenches@lists.re-wrenches.org > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > There are two list archives for searching. When one doesn't work, try the > other: > https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/ > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > > List rules & etiquette: > http://www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > http://www.members.re-wrenches.org > > _______________________________________________ > List sponsored by Redwood Alliance > > Pay optional member dues here: http://re-wrenches.org > > List Address: RE-wrenches@lists.re-wrenches.org > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > There are two list archives for searching. 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