That was basically my reply and we're not even talking about battery back up inverters only direct grid tie.   He just persisted with the what if.   Is it actually "impossible" for a direct grid tied inverter to back feed any voltage to a dead grid ?<br><br>On Sunday, November 22, 2015,  <<a href="mailto:toddcory@finestplanet.com">toddcory@finestplanet.com</a>> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><font face="arial" size="4"><p style="margin:0;padding:0;font-family:arial;font-size:14pt;word-wrap:break-word">worst case scenario, a battery based inverter system trying to power the grid would immediately shutdown on overload as the "infinite load" of the grid would look like a dead short.</p>
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<p style="margin:0;padding:0;font-family:arial;font-size:14pt;word-wrap:break-word">also, all utility workers treat lines as "live" and routinely short out feeders before working on them... so the likelihood of this being an issue is extremely tiny.</p>
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<p style="margin:0;padding:0;font-family:arial;font-size:14pt;word-wrap:break-word">someone else would have to address the liability issue, but i imagine this is covered in the utility's net metering contract.</p>
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<p style="margin:0;padding:0;font-family:arial;font-size:14pt;word-wrap:break-word">todd</p>
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<p style="margin:0;padding:0;font-family:arial;font-size:14pt;word-wrap:break-word"><br><br>On Sunday, November 22, 2015 1:19pm, "gary easton" <<a href="javascript:_e(%7B%7D,'cvml','gary@arp-solar.com');" target="_blank">gary@arp-solar.com</a>> said:<br><br></p>
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<div dir="ltr">Hello Wrenches,
<div>I have an electrical engineer customer that asked me a "what if" that I had not heard before. If an inverter somehow back feeds the grid during an outage and damages something or hurts someone who is liable? <br>-- <br>
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<div dir="ltr"><span style="border-collapse:collapse;font-family:arial,sans-serif;font-size:13px">Gary Easton<br>Appalachian Renewable Power</span>
<div><span style="border-collapse:collapse;font-family:arial,sans-serif;font-size:13px">Stewart, Ohio 45778<br>NABCEP Certified Solar PV                                                            <br>T: <a style="color:#0658b5">740-277-8498</a></span>
<div><span style="border-collapse:collapse;font-family:arial,sans-serif;font-size:13px"><a style="color:#0658b5"></a> <a href="http://www.arp-solar.com" target="_blank">www.arp-solar.com</a></span></div>
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<h1 style="color:#003399;font-family:Arial,sans-serif;font-size:12px;margin:0px">“First they ignore you. Then they laugh at you. Then they fight you. Then you win.”</h1>
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<div>~Ghandi</div>
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</div></font><br><br><br>Sent from Finest Planet WebMail.<br></blockquote><br><br>-- <br>Sent from Gmail Mobile<br>