Hi William, Are you doing open loop or closed loop communication? I'm not sure if Fortress can do a closed loop with SMA or not.
We struggled to get the open loop to work well with some Blue Ion batteries, not from a charging sense but from a sense of getting the auto gen start to trigger correctly. Basically, the SOC algorithm was always way off. For a while we were using an external voltage trigger and we could get the generator to start OK before BMS shutdown. We have since added a Namaka box and are using the "Ext BMS" setting for battery type in the Sunny Island and it has been working very well. I think the difficulty arises because the Sunny Island is so State-of-Charge centric and you can't manipulate the SOC algorithm without that Ext-BMS setting (and solid communication). One weakness of the ext BMS setting is that it won't fall back on Voltage settings if battery communication goes down, but this is a weakness throughout closed loop communication for many manufacturers. Let us know if there is a Fortress to SMA communication solution. On Fri, Sep 15, 2023 at 11:11 PM Jerry Shafer via RE-wrenches < re-wrenches@lists.re-wrenches.org> wrote: > William, Wrenches > Yes I do and it does require some basic electronics to make it work > correctly, you will need to remove the ttemp sender and make a > resistor pack to simulate the 77 degree reading otherwise it will not > charge properly, for the first one I used a breadboard to set the temp for > what I wanted to see then build a more solid state shrink wrap resistor. > Doing this will prevent undercharge by the SMA and your customer will be > happy to see the full state of charge at the batteries. > OldSchool fun times > > > > On Thu, Sep 14, 2023 at 2:12 PM William Miller via RE-wrenches < > re-wrenches@lists.re-wrenches.org> wrote: > >> Friends: >> >> >> >> I am commissioning an E-vault battery array to an existing SMA Sunny >> Island System. Does anyone have any experience with this they could share? >> >> >> >> Thanks. >> >> >> >> 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 > > -- Mac Lewis *"Yo solo sé que no sé nada." -Sócrates*
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