The BMS in the eVault Classic has been a headache. Fortunately, we were able to convince Fortress to let us proactively replace the BMS in some of our systems - especially the remote off-grid systems. We are still having problems with weird SOC readings on many of the batteries. Apparently the SOC reading can get stuck at 100% and Fortress is aware of the bug. It is frustrating because the owners rely on the SOC reading rather than voltage. This experience did convince me that Li-Ion in off-grid applications is not a reliable solution unless there are multiple independent batteries with their own BMS. The battery itself may be robust (how long have these actually been in the field in real-world applications) but the BMS is a complicated piece of electronics on which the entire system is dependent. Li-Ion violates the KISS principle. So we talk our off-grid clients out of using Li-Ion. IMHO relying on firmware and circuit boards to keep your system running and protect it from catastrophic failure is not sustainable.
*Eric Smiley,* Design Manager e...@vecoop.ca T: 250.703.6004 <+12507036004> T: 888.386.0116 <+18883860116> *VIRIDIANENERGY.CA <https://viridianenergy.ca/>* * <https://viridianenergy.ca/>* On Wed, 14 Feb 2024 at 06:47, Peter Giroux via RE-wrenches < re-wrenches@lists.re-wrenches.org> wrote: > Good morning my fellow wrenchers. While I see the comments on SunPower and > the challenges, are any of you having similar issues with Fortress? Their > bms boards from the early classics have not held up and even after > replacement there are still issues ( parallel batteries and stand alone not > showing accurate #’s, ). While support has been, well supportive, the > issues persist. Any thoughts or fixes you have come up with?? I just had a > customer unplug the coms cable from their sol-ark and bring their readings > to volts VS %% and it is starting to work a bit better. Any and all help or > ideas appreciated. > > > > Thx > peter Giroux > > American Solar > > Norcross Ga > _______________________________________________ > 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 > >
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