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--></style></head><body lang="EN-US" link="blue" vlink="purple"><div class="WordSection1"><p class="MsoNormal"><span style="font-family:"Verdana","sans-serif";color:#1f497d">Jay:</span></p><p class="MsoNormal"><span style="font-family:"Verdana","sans-serif";color:#1f497d"> </span></p><p class="MsoNormal"><span style="font-family:"Verdana","sans-serif";color:#1f497d">You are exactly right. The Radian has a fault timer settable between 5 and 30 minutes. If the Radian fails to receive acceptable generator power after that time it generators a fault, and presumably opens the contact closure.</span></p><p class="MsoNormal"><span style="font-family:"Verdana","sans-serif";color:#1f497d"> </span></p><p class="MsoNormal"><span style="font-family:"Verdana","sans-serif";color:#1f497d">The SW inverters had more settings such as pre-crank delay, post crank delay, etc.</span></p><p class="MsoNormal"><span style="font-family:"Verdana","sans-serif";color:#1f497d"> </span></p><p class="MsoNormal"><span style="font-family:"Verdana","sans-serif";color:#1f497d">The reason I ask is I am setting up a circuit to automatically start the backup generator if the main generator fails to start. We have one of the Kohler RDT transfer switches that will follow the AC source.</span></p><p class="MsoNormal"><span style="font-family:"Verdana","sans-serif";color:#1f497d"> </span></p><p class="MsoNormal"><span style="font-family:"Verdana","sans-serif";color:#1f497d">Thanks again.</span></p><p class="MsoNormal"><span style="font-family:"Verdana","sans-serif";color:#1f497d"> </span></p><p class="MsoNormal"><span style="font-family:"Verdana","sans-serif";color:#1f497d">William</span></p><p class="MsoNormal"><span style="font-family:"Verdana","sans-serif";color:#1f497d"> </span></p><div><p class="MsoNormal"><span style="font-family:"Arial","sans-serif";color:#1f497d">Miller Solar</span></p><p class="MsoNormal"><span style="font-family:"Arial","sans-serif";color:#1f497d">17395 Oak Road, Atascadero, CA 93422</span></p><p class="MsoNormal"><span style="font-family:"Arial","sans-serif";color:#1f497d">805-438-5600</span></p><p class="MsoNormal"><span style="font-family:"Arial","sans-serif";color:#1f497d"><a href="http://www.millersolar.com/"><span style="color:blue">www.millersolar.com</span></a></span></p><p class="MsoNormal"><span style="font-family:"Arial","sans-serif";color:#1f497d">CA Lic. 773985</span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span></p></div><p class="MsoNormal"><span style="font-family:"Verdana","sans-serif";color:#1f497d"> </span></p><div><div style="border:none;border-top:solid #b5c4df 1.0pt;padding:3.0pt 0in 0in 0in"><p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> Jay [mailto:<a href="mailto:jay.peltz@gmail.com">jay.peltz@gmail.com</a>] <br><b>Sent:</b> Monday, September 8, 2025 4:42 PM<br><b>To:</b> <a href="mailto:william@millersolar.com">william@millersolar.com</a>; RE-wrenches<br><b>Subject:</b> Re: [RE-wrenches] Envy Gen starting</span></p></div></div><p class="MsoNormal"> </p><div><p class="MsoNormal">Hi william</p></div><div><p class="MsoNormal"> </p></div><div><p class="MsoNormal">This is exactly the same type of ags the radian has</p></div><div><p class="MsoNormal"> </p></div><div><p class="MsoNormal">It’s supposed to work with a generator that has the auto start function in it. So the inverter just sends a start signal to it. The radian had a default of around 15 minutes if memory serves. IE if the genny doesn’t start in that amount of time the inverter ags would fault </p></div><div><p class="MsoNormal">Most generators have some number of start attempts afterwards it will usually fault. Requiring a human to clear the generator fault. The inverter start signal isn’t connected to the starter so the generator won’t continue to crank. </p></div><div><p class="MsoNormal"> </p></div><div><p class="MsoNormal">I don’t think the envy inverter goes into a fault mode. </p></div><div><p class="MsoNormal"> </p></div><div><p class="MsoNormal">I think the printed responses from fortress are clueless </p></div><div><p class="MsoNormal"> </p></div><div><p class="MsoNormal"> </p></div><div><p class="MsoNormal">There is another part that is problematic. If you have the ags start say 20% -80%. And you want to turn the generator on to charge batteries at 40% it won’t charge. It will pass through to the loads. I have talked to them that remote manual start generator should just charge up to the upper limit thats set. Yeah didn’t get anywhere. So you have to set the ags start % to where it is and then start the generator. </p></div><div><p class="MsoNormal"> </p></div><div><p class="MsoNormal">That all said. </p></div><div><p class="MsoNormal">I have a 3 stack that has been without any issues at all. Fully off grid, ags. Works </p></div><div><p class="MsoNormal"> </p></div><div><p class="MsoNormal">Jay</p></div><div><p class="MsoNormal"> </p></div><div><p class="MsoNormal"> </p></div><div><p class="MsoNormal"> </p></div><div><p class="MsoNormal"> </p></div><div><p class="MsoNormal"><br><br></p><p class="MsoNormal" style="margin-bottom:12.0pt">On Sep 8, 2025, at 5:16 PM, William Miller via RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org">re-wrenches@lists.re-wrenches.org</a>> wrote:</p></div><blockquote style="margin-top:5.0pt;margin-bottom:5.0pt"><div><p class="MsoNormal"><span style="font-family:"Tahoma","sans-serif""></span></p><div><p class="MsoNormal">Friends:</p></div><div><p class="MsoNormal"> </p></div><div><p class="MsoNormal">I am trying to understand the Envy 12. Here is the question of the day: If the Envy calls for a Gen start and the Gen fails to start, what happens? Does the contact closure open after a preset time to protect the starter? Will the Envy try more than once to start the generator?</p></div><div><p class="MsoNormal"> </p></div><div><p class="MsoNormal">Tech support says the contact closure stays closed until either the SOC goes above the Gen stop setting or the inverter shuts off due to low SOC. This sounds lame to me and disregards years of off-grid best-practice. </p></div><div><p class="MsoNormal"> </p></div><div><p class="MsoNormal">Also, tech support says I should size PV for full autonomy for the shortest, darkest, rainiest days of the year. I think this is too much solar and that is why to have a generator. Do any of you size that way?<br clear="all"><br>Thanks in advance. <br clear="all"></p><div><div><p class="MsoNormal"><br>William Miller<br>Miller Solar.com<br>805-438-5600<br><a href="http://www.millersolar.com">www.millersolar.com</a></p></div></div></div><p class="MsoNormal" style="margin-bottom:12.0pt">_______________________________________________<br>List sponsored by Redwood Alliance<br><br>Pay optional member dues here: <a href="http://re-wrenches.org">http://re-wrenches.org</a><br><br>List Address: <a href="mailto:RE-wrenches@lists.re-wrenches.org">RE-wrenches@lists.re-wrenches.org</a><br><br>Change listserver email address & settings:<br><a href="http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org">http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org</a><br><br>There are two list archives for searching. 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