I do think the Electrician tried to balance the loads in the three 240 V panels, but how close he really came especially with add-ons down the road I don’t know. It does work fine, and the system is 5+ years old now without any issues.
*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 5:46 PM david quattro <[email protected]> wrote: > 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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