If you want to go with the transformer route, try Dongan Transformers. They've helped us a few times with tech support, and they should be able to help in this situation.
As I understand it though, there is a loss of efficiency when you grid-tie through an open delta. I have the same issue with a large residential installation. My client is deciding whether to upgrade his service to a 240 split phase as he doesn't need the three-phase power. Most utilities I know of are phasing out the old 240 Delta services. Pun intended. Best of luck, Vince McClellan Energy Design NABCEP PV Installation Professional p. (541) 485-8122 f. (541) 338-8202 If you have received this email and are not the intended recipient, please delete this email. Copying or using any part, content, or attachment of this email is strictly prohibited. On Tue, Jun 6, 2023 at 10:43 AM Drake Chamberlin via RE-wrenches < [email protected]> wrote: > William, > > Sol-Ark says they can only connect to a Wye, and that they need a neutral. > > Thanks, > > Drake > --- > > > > On 2023-06-06 11:34, William Miller via RE-wrenches wrote: > > Drake: > > You should be able to connect to a 120/240 split phase feeder. Avoid the > stinger. I have done it with FXRs , works just fine. > > Wm > > On Tue, Jun 6, 2023 at 8:11 AM Drake Chamberlin via RE-wrenches < > [email protected]> wrote: > > Hello All, > > We are looking for a transformer to connect Sol-Ark inverters to an open > delta service. The Sol-Ark can only connect to a Wye configuration. > > We found one which the supplier says will do the job. It is an MGM, 240 > Delta to 208Y/120 Volt, 3-Phase. > > The supplier says this will derive a neutral which can be grounded for a > solid neutral connection. > > My concerns with what we have found so far are: > 1) How much efficiency will be lost due to connecting to an open delta? > 2) Will the derived neutral really be sufficient? > 3) The cost of the unit we found is high. Does anyone know of a source > for economically priced transformers. > > Thank you, > > Drake > > Drake Chamberlin > Athens Electric LLC > Ohio Electrical Contractor's License 44810 > CO Master Electrician's License 4526 > NABCEP Certified PV Installation Professional > > > > > -- > _______________________________________________ > 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 > > -- > > 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: [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
