Kirk, it sounds like phase imbalance is not a problem On Fri, Dec 19, 2025 at 2:42 PM Kirk Herander <[email protected]> wrote:
> 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 >> >>
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