Hi William, You will want to make sure that the eVaults are all running that same firmware and that terminator switches and battery ID #s are set correctly. High SOC and large incoming current could definitely be the reason why voltage skyrocketed up.
Best, Chris On Sat, Oct 21, 2023 at 9:39 PM William Miller via RE-wrenches < re-wrenches@lists.re-wrenches.org> wrote: > 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 >> >> _______________________________________________ > 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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