<div dir="ltr"><div class="gmail_default" style="font-family:times new roman,serif;font-size:large">Hello and happy holidays. About 10 years ago, I had a similar problem with a similar customer who wanted a similar problem solved. The Generac auto transfer switch needed a 12 volt source. When the grid went down the generac transfer switch disconnected and waited about 10 to 15 seconds then started the generator. The customer wanted shorter outage transfer time. I used the inverter driving a dedicated load panel picking up the priority loads. When the generator started it would, then after 3 minutes, the inverter would drop out letting the generator carry all loads, and the inverter would go back to battery charging. (note: 8 kW for 15 to 20 minutes is only 2.7 kWh, but the battery system has to be fast, a LiFe at C/2 requires 16 kWh/ 300 AH@ 48V and a LA at C/6 requires 48 kWh or 1000 AH) This job also had solar, and it was DC coupled using a charge controller. It has been working for years, but has never had a major outage. The generator better be a good clean signal. also the grid outage has to be longer than 10 to 15 seconds for the generator to take over, and the customer wants if the generator on propane runs out of fuel to go to solar in my case. Many years ago I had an off grid customer with a 200 amp service I supplied using two Outback FX and an auto transformer. It worked for years. Good luck. </div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sat, Dec 17, 2022 at 10:28 AM Dana Orzel via RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org">re-wrenches@lists.re-wrenches.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div class="msg8699437172738724622"><div lang="EN-US" style="overflow-wrap: break-word;"><div class="m_8699437172738724622WordSection1"><p class="MsoNormal"><span style="font-size:14pt;font-family:"Century Gothic",sans-serif">Hey All a Cheery Season to you all!<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:14pt;font-family:"Century Gothic",sans-serif"><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-size:14pt;font-family:"Century Gothic",sans-serif">I inherited a backup system that had “failed”. It was unwired, & poorly labeled.<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:14pt;font-family:"Century Gothic",sans-serif"><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-size:14pt;font-family:"Century Gothic",sans-serif">1200 AHR AGM Battery – 1 Radian 8KW inverter – 200 amp Generac transfer switch – No solar - Feeding a 200 amp house panel.<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:14pt;font-family:"Century Gothic",sans-serif"><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-size:14pt;font-family:"Century Gothic",sans-serif">First I explained the there were too many loads for an 8KW inverter. It could & may overload the 8KW inverter. They said “it had worked fine for 5 years & they were OK with it as is please get it back up”…<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:14pt;font-family:"Century Gothic",sans-serif">Replaced the existing Eaton transfer switch as the Generac controller was shot, with a Generac 200 amp Xfer switch complete with controller & transfer switch.<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:14pt;font-family:"Century Gothic",sans-serif">Rewired & had to recharge the 48 volt battery from 20volt back up to full with a pair of IOTA chargers in series.<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:14pt;font-family:"Century Gothic",sans-serif"><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-size:14pt;font-family:"Century Gothic",sans-serif">The original trigger was 3 wires from the Radian to the 12 volt & AUX output to the input on the Generac controller. These were disconnected on the Generac end. So no clue or labeling there.<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:14pt;font-family:"Century Gothic",sans-serif"><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-size:14pt;font-family:"Century Gothic",sans-serif">I called Outback & they called it Redneck engineering & send me a few articles to read.<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:14pt;font-family:"Century Gothic",sans-serif"><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-size:14pt;font-family:"Century Gothic",sans-serif">Has anyone configured a backup in this manner?<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:14pt;font-family:"Century Gothic",sans-serif"><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-size:14pt;font-family:"Century Gothic",sans-serif">All suggestions appreciated, thanks & wishing you all a safe & sane season!<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:14pt;font-family:"Century Gothic",sans-serif"><u></u> <u></u></span></p><div style="border-top:none;border-right:none;border-left:none;border-bottom:1.5pt solid windowtext;padding:0in 0in 1pt"><p class="MsoNormal" style="border:none;padding:0in"><span style="font-size:14pt;font-family:"Century Gothic",sans-serif"><u></u> <u></u></span></p></div><p class="MsoNormal"><span style="font-family:"Century Gothic",sans-serif;color:rgb(0,32,96)"><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-size:12pt;font-family:"Century Gothic",sans-serif">Dana Orzel Great Solar Works, Inc. <u></u><u></u></span></p><p class="MsoNormal"><b><span style="font-size:14pt;font-family:"Century Gothic",sans-serif">C - 208.721.7003 <a href="mailto:dana@solarwork.com" target="_blank">dana@solarwork.com</a><u></u><u></u></span></b></p><p class="MsoNormal"><span style="font-size:12pt;font-family:"Century Gothic",sans-serif">Idaho Contractor - # 028765 Idaho PV # 028374<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:12pt;font-family:"Century Gothic",sans-serif"><a href="http://www.greatsolarworks.com/" target="_blank">www.greatsolarworks.com</a> <a href="http://www.solarwor.com" target="_blank">www.solarwor.com</a> <u></u><u></u></span></p><p class="MsoNormal"><u><span style="font-size:12pt;font-family:"Century Gothic",sans-serif">"Responsible Technologies for Responsible People since 1988" </span></u><u><span style="font-size:12pt;font-family:"Century Gothic",sans-serif"><u></u><u></u></span></u></p><p class="MsoNormal" style="background:white"><b><span style="font-size:18pt;font-family:Webdings;color:green"><u></u> <u></u></span></b></p><p class="MsoNormal" style="background:white"><b><span style="font-size:18pt;font-family:Webdings;color:green">P</span></b><span style="font-family:Helvetica,sans-serif;color:navy"> </span><span style="font-size:10pt;font-family:Arial,sans-serif;color:green">Please consider the environment before printing this email.</span><span style="font-family:Helvetica,sans-serif;color:black"><u></u><u></u></span></p><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal"><u></u> <u></u></p></div></div>_______________________________________________<br>
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