12 kw PV nominal. Low tilt angle and old panels so reality is far less. 5 e-vault 18.5 kWh batteries 4 SI 6048 2 SB 6000 US
System operational for some years with flooded batteries. Just installed the e-vaults. I reset the system to factory defaults. I am not sure how to verify the system will properly offset frequency if batteries are full. Having just written this I realize there is a discrepancy between the SOC the SIs report (46%) and the SOC the e-vaults report (98%). It could be the SIs want to push a lot of charge to the e-vaults but they won’t accept the charge because they are charged. I installed 3 of the vaults temporarily a week ago. At first there was a large discrepancy between SOC from batteries to SIs. Eventually that delta reduced to 4%. Maybe this problem will resolve itself? What settings on the SI are necessary to enable frequency shifting? Thanks everyone for the response. There is nothing worse than being on-site and not knowing how to get a system to operate. I shut off the PV and will let the generator fill in the deficit until Monday. William Miller Miller Solar.com 805-438-5600 www.millersolar.com On Sat, Oct 21, 2023 at 4:57 PM Ray Walters via RE-wrenches < re-wrenches@lists.re-wrenches.org> wrote: > What is the array size vs the battery size? Sounds like a big array on a > small battery for the voltage to go that high that fast. > > Ray > Remote Solar > On 10/21/2023 5:46 PM, William Miller via RE-wrenches wrote: > > Friends: > > I’m kinda stuck on a project setting up a SI/SB AC coupled system off > grid. When the SB inverters ramp up the battery voltage jumps to 69 pretty > quickly and the system shuts off. > > I checked the mini-grid frequency and it does ramp up to about 62+ but > apparently not soon enough to curtail charging. I shut off the SBs for now > and we can rely on generator. > > Any advice via email or a phone call would be appreciated. SMA can be > less than helpful, especially for systems with lithium batteries. > > Thanks in advance. > > William Miller > Miller Solar.com > 805-438-5600 > www.millersolar.com > > _______________________________________________ > 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 > >
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