<div dir="auto"><div><div>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.</div><div dir="auto"><br></div><div dir="auto">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.</div><div dir="auto"><br></div><div dir="auto">This is just another example of poorly documented and ambiguous operational control that plagues all of the all-in-one inverters.</div><div><br></div><div data-smartmail="gmail_signature"><div dir="ltr"><br>Jason Szumlanski<div><span style="color:rgb(51,51,51);font-family:Roboto,RobotoDraft,Helvetica,Arial,sans-serif;font-size:13px">Principal Solar Designer | Florida Solar Design Group</span><br style="color:rgb(51,51,51);font-family:Roboto,RobotoDraft,Helvetica,Arial,sans-serif;font-size:13px"><span style="color:rgb(51,51,51);font-family:Roboto,RobotoDraft,Helvetica,Arial,sans-serif;font-size:13px">NABCEP Certified Solar Professional (PVIP)</span><br style="color:rgb(51,51,51);font-family:Roboto,RobotoDraft,Helvetica,Arial,sans-serif;font-size:13px"><span style="color:rgb(51,51,51);font-family:Roboto,RobotoDraft,Helvetica,Arial,sans-serif;font-size:13px">Florida State Certified Solar Contractor CVC56956</span></div><div><font color="#333333" face="Roboto, RobotoDraft, Helvetica, Arial, sans-serif">Florida Certified Electrical Contractor EC13013208</font></div></div></div><br><div class="gmail_quote gmail_quote_container"><div dir="ltr" class="gmail_attr">On Thu, Jul 3, 2025, 4:14\u202fPM Lloyd Hoffstatter <<a href="mailto:lloyd@sunstruckconsulting.com">lloyd@sunstruckconsulting.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div>
<div>
<div dir="ltr" style="font-family:Aptos,Aptos_MSFontService,-apple-system,Roboto,Arial,Helvetica,sans-serif;font-size:12pt">
Sol-Ark strongly recommends only using a line side generator under inverter 2 wire control and with AC coupled inverters off, per several webinars. </div>
<div dir="ltr" style="font-family:Aptos,Aptos_MSFontService,-apple-system,Roboto,Arial,Helvetica,sans-serif;font-size:12pt">
Best regards,</div>
<div dir="ltr" style="font-family:Aptos,Aptos_MSFontService,-apple-system,Roboto,Arial,Helvetica,sans-serif;font-size:12pt">
Lloyd</div>
</div>
<div id="m_-1746362179148414471ms-outlook-mobile-body-separator-line" dir="auto"><br>
</div>
<div id="m_-1746362179148414471ms-outlook-mobile-signature">
<div>I\u2019m lLlCOGet <a href="https://aka.ms/o0ukef" target="_blank" rel="noreferrer">Outlook fo</a></div>
</div>
<hr style="display:inline-block;width:98%">
<div id="m_-1746362179148414471divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> RE-wrenches <<a href="mailto:re-wrenches-bounces@lists.re-wrenches.org" target="_blank" rel="noreferrer">re-wrenches-bounces@lists.re-wrenches.org</a>> on behalf of Jason Szumlanski via RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org" target="_blank" rel="noreferrer">re-wrenches@lists.re-wrenches.org</a>><br>
<b>Sent:</b> Thursday, July 3, 2025 3:10:07 PM<br>
<b>To:</b> RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org" target="_blank" rel="noreferrer">re-wrenches@lists.re-wrenches.org</a>><br>
<b>Cc:</b> Jason Szumlanski <<a href="mailto:jason@floridasolardesigngroup.com" target="_blank" rel="noreferrer">jason@floridasolardesigngroup.com</a>><br>
<b>Subject:</b> Re: [RE-wrenches] Sol-Ark 15K Gen on Grid Terminal (with GTBB)</font>
<div> </div>
</div>
<div>
<div dir="ltr">
<div dir="ltr">
<div>
<div style="font-family:arial,helvetica,sans-serif">This guy wants the smart load capability, too.</div>
<br clear="all">
</div>
<div>
<div dir="ltr">
<div dir="ltr"><br>
Jason
<div><br>
</div>
</div>
</div>
</div>
<br>
</div>
<br>
<div>
<div dir="ltr">On Thu, Jul 3, 2025 at 8:42\u202fAM Jay via RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org" target="_blank" rel="noreferrer">re-wrenches@lists.re-wrenches.org</a>> wrote:<br>
</div>
<blockquote style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div dir="auto">
<div dir="ltr"></div>
<div dir="ltr">It\u2019s got generator input terminals. </div>
<div dir="ltr">Why not use them for the generator?</div>
<div dir="ltr"><br>
</div>
<div dir="ltr"><br>
<blockquote type="cite">On Jul 3, 2025, at 5:05\u202fAM, Jason Szumlanski via RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org" target="_blank" rel="noreferrer">re-wrenches@lists.re-wrenches.org</a>> wrote:<br>
<br>
</blockquote>
</div>
<blockquote type="cite">
<div dir="ltr">\ufeff
<div dir="auto">
<div>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. </div>
<div dir="auto"><br>
</div>
<div dir="auto">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?</div>
<div dir="auto"><br>
</div>
<div dir="auto">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.</div>
<div dir="auto"><br>
</div>
<div dir="auto">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. </div>
<div dir="auto"><br>
</div>
<div dir="auto">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. </div>
<div dir="auto"><br>
</div>
<div dir="auto">Of course, the Off-Grid section of the manual does tell you to not use the Grid Sell option.<br>
<br>
</div>
<div dir="auto"><br>
</div>
<div dir="auto">Jason Szumlanski </div>
<div dir="auto">Florida Solar Design Group </div>
<div dir="auto"><br>
</div>
<div dir="auto"><br>
</div>
<div>
<div dir="ltr">
<div dir="ltr">
<div dir="ltr">
<div dir="ltr">
<div dir="ltr">
<div dir="ltr"><b>
<div style="text-align:center">
<table border="0" cellpadding="0" cellspacing="0" style="color:rgb(34,34,34);font-weight:400;text-align:start;font-family:"helvetica neue",helvetica,arial,sans-serif">
<tbody>
</tbody>
</table>
</div>
</b></div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
<div><Screenshot_20250703_063315_Drive.jpg></div>
<span>_______________________________________________</span><br>
<span>List sponsored by Redwood Alliance</span><br>
<span></span><br>
<span>Pay optional member dues here: <a href="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=" target="_blank" rel="noreferrer">
http://re-wrenches.org</a></span><br>
<span></span><br>
<span>List Address: <a href="mailto:RE-wrenches@lists.re-wrenches.org" target="_blank" rel="noreferrer">
RE-wrenches@lists.re-wrenches.org</a></span><br>
<span></span><br>
<span>Change listserver email address & settings:</span><br>
<span><a href="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=" target="_blank" rel="noreferrer">http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org</a></span><br>
<span></span><br>
<span>There are two list archives for searching. When one doesn't work, try the other:</span><br>
<span><a href="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=" target="_blank" rel="noreferrer">https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/</a></span><br>
<span><a href="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=" target="_blank" rel="noreferrer">http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org</a></span><br>
<span></span><br>
<span>List rules & etiquette:</span><br>
<span><a href="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=" target="_blank" rel="noreferrer">http://www.re-wrenches.org/etiquette.htm</a></span><br>
<span></span><br>
<span>Check out or update participant bios:</span><br>
<span><a href="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=" target="_blank" rel="noreferrer">http://www.members.re-wrenches.org</a></span><br>
<span></span><br>
</div>
</blockquote>
</div>
_______________________________________________<br>
List sponsored by Redwood Alliance<br>
<br>
Pay optional member dues here: <a href="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=" rel="noreferrer noreferrer" target="_blank">
http://re-wrenches.org</a><br>
<br>
List Address: <a href="mailto:RE-wrenches@lists.re-wrenches.org" target="_blank" rel="noreferrer">
RE-wrenches@lists.re-wrenches.org</a><br>
<br>
Change listserver email address & settings:<br>
<a href="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=" rel="noreferrer noreferrer" target="_blank">http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org</a><br>
<br>
There are two list archives for searching. When one doesn't work, try the other:<br>
<a href="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=" rel="noreferrer noreferrer" target="_blank">https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/</a><br>
<a href="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=" rel="noreferrer noreferrer" target="_blank">http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org</a><br>
<br>
List rules & etiquette:<br>
<a href="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=" rel="noreferrer noreferrer" target="_blank">http://www.re-wrenches.org/etiquette.htm</a><br>
<br>
Check out or update participant bios:<br>
<a href="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=" rel="noreferrer noreferrer" target="_blank">http://www.members.re-wrenches.org</a><br>
<br>
</blockquote>
</div>
</div>
</div>
</div>
</blockquote></div></div></div>