Hi, I’ve done one large off grid system with 480 -3 - phase inverters and 1 mwh, 850 vdc LFP storage.
We created 240vac by stepping each 480v L-L phase down to 240 through its own transformer of proper size. So we have three 240/120 VAC panels for typical household loads. *Kirk Herander / **[email protected] <[email protected]>* *Owner|Principal, VT Solar, LLC* *Celebrating our 34st Anniversary 1991-2025!!* dba Vermont Solar Engineering 802.559.1225 On Fri, Dec 19, 2025 at 5:25 PM david quattro via RE-wrenches < [email protected]> wrote: > I’ve thought about HV and 60K model, but my loads are 240 Single phase, > across 5 separate contiguous parcels. all these homes already have their > own utility meters. There is one owner. The plan is to have an ATS at > each meter. > Regarding 3 phase offgrid, I’ve been concerned about phase imbalance. > Maybe I don’t need to worry about that. > > > > On Fri, Dec 19, 2025 at 1:51 PM Michael Morningstar via RE-wrenches < > [email protected]> wrote: > >> A couple or three Discover HVs and Sol-Ark 60ks. Done quickly >> >> On Fri, Dec 19, 2025 at 1:00 PM Kirk Herander via RE-wrenches < >> [email protected]> wrote: >> >>> Why 48v, why not commercial DC, like 850? What are you looking at for >>> kwh storage? A1000vdc buss, homemade or otherwise, would drop the buss >>> rating down to about 300 A. Commercial grade inverters, such as 3-phase >>> Delta PCS inverters are spec'ed for these situations. >>> >>> On Fri, Dec 19, 2025 at 1:13 PM david quattro via RE-wrenches < >>> [email protected]> wrote: >>> >>>> Hi everyone, >>>> I am still helping an uber wealthy owner determine if he really >>>> wants this much power. If he does, do any of you have experience sourcing a >>>> 48v battery-combiner on the order of 4500 to 5000 amps? >>>> I also want to get clear on how to best wire from batteries to >>>> combiner, and from combiner to inverters. I read here on the Wrenches list >>>> about some electricians who strategically sized conductor AWG so that >>>> resistance matches, which seems straightforward once we get our components >>>> mounted and accurate distances can be determined. Can anyone on list >>>> provide feedback about that, I really appreciate it! >>>> Thank you >>>> _______________________________________________ >>>> List sponsored by Redwood Alliance >>>> >>>> Pay optional member dues here: http://re-wrenches.org >>>> >>>> List Address: [email protected] >>>> >>>> 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/[email protected]/ >>>> 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 >>>> >>>> >>> >>> -- >>> >>> >>> *Kirk Herander / **[email protected] <[email protected]>* >>> >>> *Owner|Principal, VT Solar, LLC* >>> >>> *Celebrating our 34st Anniversary 1991-2025!!* >>> >>> dba Vermont Solar Engineering >>> >>> 802.559.1225 >>> _______________________________________________ >>> List sponsored by Redwood Alliance >>> >>> Pay optional member dues here: http://re-wrenches.org >>> >>> List Address: [email protected] >>> >>> 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/[email protected]/ >>> 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 >>> >>> >> >> -- >> >> Michael Morningstar >> >> >> Morningstar Electric Inc >> >> PO Box 1494 >> >> Mount Shasta, CA 96067 >> >> 530-921-0560 >> >> CSLB 1116835 >> >> [email protected] >> >> >> _______________________________________________ >> List sponsored by Redwood Alliance >> >> Pay optional member dues here: http://re-wrenches.org >> >> List Address: [email protected] >> >> 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/[email protected]/ >> 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: [email protected] > > 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/[email protected]/ > 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: [email protected] 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/[email protected]/ 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
