That might be their recommendation, but it doesn't stop someone from manually starting the generator when the utility is down. Their wiring diagram leave a lot to be desired in terms of how program the system in this configuration.
Even if they strongly recommend that in webinars, it still isn't clear to me if Grid Sell is automatically disabled when the 2-wire start relay is closed. Honestly, I wouldn't trust the answer from a random tech support agent, especially with various firmwares floating around. This is just another example of poorly documented and ambiguous operational control that plagues all of the all-in-one inverters. Jason Szumlanski Principal Solar Designer | Florida Solar Design Group NABCEP Certified Solar Professional (PVIP) Florida State Certified Solar Contractor CVC56956 Florida Certified Electrical Contractor EC13013208 On Thu, Jul 3, 2025, 4:14 PM Lloyd Hoffstatter < [email protected]> wrote: > Sol-Ark strongly recommends only using a line side generator under > inverter 2 wire control and with AC coupled inverters off, per several > webinars. > Best regards, > Lloyd > > I’m lLlCOGet Outlook fo <https://aka.ms/o0ukef> > ------------------------------ > *From:* RE-wrenches <[email protected]> on behalf > of Jason Szumlanski via RE-wrenches <[email protected]> > *Sent:* Thursday, July 3, 2025 3:10:07 PM > *To:* RE-wrenches <[email protected]> > *Cc:* Jason Szumlanski <[email protected]> > *Subject:* Re: [RE-wrenches] Sol-Ark 15K Gen on Grid Terminal (with GTBB) > > This guy wants the smart load capability, too. > > > Jason > > > > On Thu, Jul 3, 2025 at 8:42 AM Jay via RE-wrenches < > [email protected]> wrote: > > It’s got generator input terminals. > Why not use them for the generator? > > > On Jul 3, 2025, at 5:05 AM, Jason Szumlanski via RE-wrenches < > [email protected]> wrote: > > > The attached wiring diagram from the manual shows both a generator and > grid connected to the Sol-Ark Grid input with a transfer switch to select > between grid and generator. > > Question: If you program the inverter for GEN on Grid Input and allow Grid > Sell, how would the inverter know what the input source is and prevent > selling to the generator inadvertently? > > I suppose if it is an automatic transfer switch and the two wire start is > called for, the inverter might stop grid selling when calling for the > generator (but I'm not sure if that's the case). In any case, that's not a > failsafe solution because the generator could be started and selected > manually with the transfer switch and the inverter would not know it. > > I have someone insisting that Sol-Ark supports this configuration with > Grid Sell enabled. I can't imagine that is the case. At a minimum, it would > be bad practice. > > In my opinion, the interface should disallow Grid Sell altogether when GEN > on Grid Input is selected. Maybe it's already doing that internally, but it > isn't clear at all from the interface or the manual. > > Of course, the Off-Grid section of the manual does tell you to not use the > Grid Sell option. > > > Jason Szumlanski > Florida Solar Design Group > > > <Screenshot_20250703_063315_Drive.jpg> > _______________________________________________ > List sponsored by Redwood Alliance > > Pay optional member dues here: http://re-wrenches.org > <https://urldefense.proofpoint.com/v2/url?u=http-3A__re-2Dwrenches.org&d=DwMFaQ&c=euGZstcaTDllvimEN8b7jXrwqOf-v5A_CdpgnVfiiMM&r=p2tHyHEAjVe2zSh4C_236V4KkHnn0z0ynUvWz0mobds&m=mxfPWzvsNzBC4eZdAQ-FGEQj_G8-9tjDnnh0oMPtW91EDTfwSm3KFOL8ZoelkNoJ&s=4FvOSe4NGu37BU4qAvgNlANFr7FWsAOMt48UWtIQUPc&e=> > > List Address: [email protected] > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > <https://urldefense.proofpoint.com/v2/url?u=http-3A__lists.re-2Dwrenches.org_options.cgi_re-2Dwrenches-2Dre-2Dwrenches.org&d=DwMFaQ&c=euGZstcaTDllvimEN8b7jXrwqOf-v5A_CdpgnVfiiMM&r=p2tHyHEAjVe2zSh4C_236V4KkHnn0z0ynUvWz0mobds&m=mxfPWzvsNzBC4eZdAQ-FGEQj_G8-9tjDnnh0oMPtW91EDTfwSm3KFOL8ZoelkNoJ&s=RHL10Csg2v-ABpYHW42RAqaKG3JoPnrTrYAquabj5_I&e=> > > There are two list archives for searching. When one doesn't work, try the > other: > https://www.mail-archive.com/[email protected]/ > <https://urldefense.proofpoint.com/v2/url?u=https-3A__www.mail-2Darchive.com_re-2Dwrenches-40lists.re-2Dwrenches.org_&d=DwMFaQ&c=euGZstcaTDllvimEN8b7jXrwqOf-v5A_CdpgnVfiiMM&r=p2tHyHEAjVe2zSh4C_236V4KkHnn0z0ynUvWz0mobds&m=mxfPWzvsNzBC4eZdAQ-FGEQj_G8-9tjDnnh0oMPtW91EDTfwSm3KFOL8ZoelkNoJ&s=3sMiwLKcN4gZazgTSadNd5GjkRjsabVhdoyuUjJCiL8&e=> > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > <https://urldefense.proofpoint.com/v2/url?u=http-3A__lists.re-2Dwrenches.org_pipermail_re-2Dwrenches-2Dre-2Dwrenches.org&d=DwMFaQ&c=euGZstcaTDllvimEN8b7jXrwqOf-v5A_CdpgnVfiiMM&r=p2tHyHEAjVe2zSh4C_236V4KkHnn0z0ynUvWz0mobds&m=mxfPWzvsNzBC4eZdAQ-FGEQj_G8-9tjDnnh0oMPtW91EDTfwSm3KFOL8ZoelkNoJ&s=9u9k_VQwIOgUqWz14v2L7oIkkF5ScOkfEHJdqA9nJjU&e=> > > List rules & etiquette: > http://www.re-wrenches.org/etiquette.htm > <https://urldefense.proofpoint.com/v2/url?u=http-3A__www.re-2Dwrenches.org_etiquette.htm&d=DwMFaQ&c=euGZstcaTDllvimEN8b7jXrwqOf-v5A_CdpgnVfiiMM&r=p2tHyHEAjVe2zSh4C_236V4KkHnn0z0ynUvWz0mobds&m=mxfPWzvsNzBC4eZdAQ-FGEQj_G8-9tjDnnh0oMPtW91EDTfwSm3KFOL8ZoelkNoJ&s=_vhuVccTkS2riSys1DxXCw9M4L-3JYGPePRQp3rKzqQ&e=> > > Check out or update participant bios: > http://www.members.re-wrenches.org > <https://urldefense.proofpoint.com/v2/url?u=http-3A__www.members.re-2Dwrenches.org&d=DwMFaQ&c=euGZstcaTDllvimEN8b7jXrwqOf-v5A_CdpgnVfiiMM&r=p2tHyHEAjVe2zSh4C_236V4KkHnn0z0ynUvWz0mobds&m=mxfPWzvsNzBC4eZdAQ-FGEQj_G8-9tjDnnh0oMPtW91EDTfwSm3KFOL8ZoelkNoJ&s=UJIuL9RzbWJzjFwJgJEsVDzW7q8ur9_-cGCeQQDu9bQ&e=> > > _______________________________________________ > List sponsored by Redwood Alliance > > Pay optional member dues here: http://re-wrenches.org > <https://urldefense.proofpoint.com/v2/url?u=http-3A__re-2Dwrenches.org&d=DwMFaQ&c=euGZstcaTDllvimEN8b7jXrwqOf-v5A_CdpgnVfiiMM&r=p2tHyHEAjVe2zSh4C_236V4KkHnn0z0ynUvWz0mobds&m=mxfPWzvsNzBC4eZdAQ-FGEQj_G8-9tjDnnh0oMPtW91EDTfwSm3KFOL8ZoelkNoJ&s=4FvOSe4NGu37BU4qAvgNlANFr7FWsAOMt48UWtIQUPc&e=> > > List Address: [email protected] > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > <https://urldefense.proofpoint.com/v2/url?u=http-3A__lists.re-2Dwrenches.org_options.cgi_re-2Dwrenches-2Dre-2Dwrenches.org&d=DwMFaQ&c=euGZstcaTDllvimEN8b7jXrwqOf-v5A_CdpgnVfiiMM&r=p2tHyHEAjVe2zSh4C_236V4KkHnn0z0ynUvWz0mobds&m=mxfPWzvsNzBC4eZdAQ-FGEQj_G8-9tjDnnh0oMPtW91EDTfwSm3KFOL8ZoelkNoJ&s=RHL10Csg2v-ABpYHW42RAqaKG3JoPnrTrYAquabj5_I&e=> > > There are two list archives for searching. When one doesn't work, try the > other: > https://www.mail-archive.com/[email protected]/ > <https://urldefense.proofpoint.com/v2/url?u=https-3A__www.mail-2Darchive.com_re-2Dwrenches-40lists.re-2Dwrenches.org_&d=DwMFaQ&c=euGZstcaTDllvimEN8b7jXrwqOf-v5A_CdpgnVfiiMM&r=p2tHyHEAjVe2zSh4C_236V4KkHnn0z0ynUvWz0mobds&m=mxfPWzvsNzBC4eZdAQ-FGEQj_G8-9tjDnnh0oMPtW91EDTfwSm3KFOL8ZoelkNoJ&s=3sMiwLKcN4gZazgTSadNd5GjkRjsabVhdoyuUjJCiL8&e=> > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > <https://urldefense.proofpoint.com/v2/url?u=http-3A__lists.re-2Dwrenches.org_pipermail_re-2Dwrenches-2Dre-2Dwrenches.org&d=DwMFaQ&c=euGZstcaTDllvimEN8b7jXrwqOf-v5A_CdpgnVfiiMM&r=p2tHyHEAjVe2zSh4C_236V4KkHnn0z0ynUvWz0mobds&m=mxfPWzvsNzBC4eZdAQ-FGEQj_G8-9tjDnnh0oMPtW91EDTfwSm3KFOL8ZoelkNoJ&s=9u9k_VQwIOgUqWz14v2L7oIkkF5ScOkfEHJdqA9nJjU&e=> > > List rules & etiquette: > http://www.re-wrenches.org/etiquette.htm > <https://urldefense.proofpoint.com/v2/url?u=http-3A__www.re-2Dwrenches.org_etiquette.htm&d=DwMFaQ&c=euGZstcaTDllvimEN8b7jXrwqOf-v5A_CdpgnVfiiMM&r=p2tHyHEAjVe2zSh4C_236V4KkHnn0z0ynUvWz0mobds&m=mxfPWzvsNzBC4eZdAQ-FGEQj_G8-9tjDnnh0oMPtW91EDTfwSm3KFOL8ZoelkNoJ&s=_vhuVccTkS2riSys1DxXCw9M4L-3JYGPePRQp3rKzqQ&e=> > > Check out or update participant bios: > http://www.members.re-wrenches.org > <https://urldefense.proofpoint.com/v2/url?u=http-3A__www.members.re-2Dwrenches.org&d=DwMFaQ&c=euGZstcaTDllvimEN8b7jXrwqOf-v5A_CdpgnVfiiMM&r=p2tHyHEAjVe2zSh4C_236V4KkHnn0z0ynUvWz0mobds&m=mxfPWzvsNzBC4eZdAQ-FGEQj_G8-9tjDnnh0oMPtW91EDTfwSm3KFOL8ZoelkNoJ&s=UJIuL9RzbWJzjFwJgJEsVDzW7q8ur9_-cGCeQQDu9bQ&e=> > >
_______________________________________________ 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
