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--></style></head><body bgcolor="white" lang="EN-US" link="#000000" vlink="#000000"><div class="WordSection1"><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Batteries actually do better if they are cycled than if they just sit there. He may actually extend his battery life. What kind of batteries is he using?</span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","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""> <a href="mailto:re-wrenches-bounces@lists.re-wrenches.org">re-wrenches-bounces@lists.re-wrenches.org</a> [mailto:<a href="mailto:re-wrenches-bounces@lists.re-wrenches.org">re-wrenches-bounces@lists.re-wrenches.org</a>] <b>On Behalf Of </b>SunHarvest<br>
<b>Sent:</b> Friday, April 26, 2013 2:25 PM<br><b>To:</b> RE-wrenches<br><b>Subject:</b> Re: [RE-wrenches] Battery Back-up and Grid Tie</span></p></div></div><p class="MsoNormal"> </p><div><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">I have a crazy...I mean <em><span style="font-family:"Arial","sans-serif"">creative</span></em> customer who wants a BB system so that he can run off-grid during peak and partial-peak rate hours: 1 to 7pm is peak, 7 to 9pm is partial from PG&E. He got this great idea from a tech at a reputable power optimizer manufacturer, whom I will not name here, who said, "you've got the batteries just sitting there; why not put them to work?"</span></p>
</div><div><p class="MsoNormal"> </p></div><div><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">Initially he wanted his PV to operate while the sun is shining and the grid is down...and his batteries to supply power when the sun <em><span style="font-family:"Arial","sans-serif"">and</span></em> grid is down. But now he wants his back-up system to do it all. We've touched on all the obvious points: </span></p>
</div><div><p class="MsoNormal"> </p></div><div><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">- Peak buying is also peak selling</span></p></div><div><p class="MsoNormal">
<span style="font-size:10.0pt;font-family:"Arial","sans-serif"">- Physics and efficiency losses determine that the energy he "saves" will never equal the energy he can put back into his system.</span></p>
</div><div><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">- Decreased battery life due to increased cycling</span></p></div><div><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">- Costs for batts and special inverters versus generator</span></p>
</div><div><p class="MsoNormal"> </p></div><div><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">What is the <u>definitive</u> argument against BB in general and this "peak shaving" idea in particular?</span></p>
</div><div><p class="MsoNormal"> </p></div><div><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">Thanks pros.</span></p></div><div><p class="MsoNormal"> </p></div><div>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">Eric</span></p></div><div><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">SunHarvest</span></p>
</div><div><p class="MsoNormal"> </p></div><div><p class="MsoNormal">----- Original Message ----- </p></div><blockquote style="border:none;border-left:solid black 1.5pt;padding:0in 0in 0in 4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5.0pt">
<div><p class="MsoNormal" style="background:#e4e4e4"><b><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Arial","sans-serif""> <a href="mailto:toddcory@finestplanet.com" title="toddcory@finestplanet.com">toddcory@finestplanet.com</a> </span></p>
</div><div><p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">To:</span></b><span style="font-size:10.0pt;font-family:"Arial","sans-serif""> <a href="mailto:re-wrenches@lists.re-wrenches.org" title="re-wrenches@lists.re-wrenches.org">RE-wrenches</a> </span></p>
</div><div><p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">Sent:</span></b><span style="font-size:10.0pt;font-family:"Arial","sans-serif""> Friday, April 26, 2013 11:57 AM</span></p>
</div><div><p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">Subject:</span></b><span style="font-size:10.0pt;font-family:"Arial","sans-serif""> Re: [RE-wrenches] Battery Back-up and Grid Tie</span></p>
</div><div><p class="MsoNormal"> </p></div><p style="margin:0in;margin-bottom:.0001pt"><span style="font-family:"Arial","sans-serif"">our power outages generally come from bad weather too... and of course when the weather is bad the pv does next to nothing. so for emergency backup, i recommend a generator.</span></p>
<p style="margin:0in;margin-bottom:.0001pt"><span style="font-family:"Arial","sans-serif""> </span></p><p style="margin:0in;margin-bottom:.0001pt"><span style="font-family:"Arial","sans-serif"">todd</span></p>
<p style="margin:0in;margin-bottom:.0001pt"><span style="font-family:"Arial","sans-serif""> </span></p><p style="margin:0in;margin-bottom:.0001pt"><span style="font-family:"Arial","sans-serif""> </span></p>
<p style="margin:0in;margin-bottom:.0001pt"><span style="font-family:"Arial","sans-serif""> </span></p><p style="margin:0in;margin-bottom:.0001pt"><span style="font-family:"Arial","sans-serif""> </span></p>
<p style="margin:0in;margin-bottom:.0001pt"><span style="font-family:"Arial","sans-serif""> </span></p><p style="margin-right:0in;margin-bottom:12.0pt;margin-left:0in"><span style="font-family:"Arial","sans-serif"">On Friday, April 26, 2013 10:33am, "Bill Turberville" <<a href="mailto:billturb@ece-llc.com">billturb@ece-llc.com</a>> said:</span></p>
<div id="SafeStyles1367002557"><div><p class="MsoNormal"><span style="color:#1f497d">Not very often, and usually for no more than an hour or two, although it has been down as long as 5 days, either during tornado season, or ice taking down power lines. What these people are looking for is Just In Case a big event happens. They do not want to have all those panels just sitting there.</span></p>
<div><div style="border:none;border-top:solid #b5c4df 1.0pt;padding:3.0pt 0in 0in 0in"><p class="MsoNormal"><strong><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></strong><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> <a href="mailto:re-wrenches-bounces@lists.re-wrenches.org"><u><span style="color:blue">re-wrenches-bounces@lists.re-wrenches.org</span></u></a> [mailto:<a href="mailto:re-wrenches-bounces@lists.re-wrenches.org"><u><span style="color:blue">re-wrenches-bounces@lists.re-wrenches.org</span></u></a>] <strong><span style="font-family:"Tahoma","sans-serif"">On Behalf Of </span></strong>Jay Peltz<br>
<strong><span style="font-family:"Tahoma","sans-serif"">Sent:</span></strong> Friday, April 26, 2013 12:25 PM<br><strong><span style="font-family:"Tahoma","sans-serif"">To:</span></strong> RE-wrenches<br>
<strong><span style="font-family:"Tahoma","sans-serif"">Subject:</span></strong> Re: [RE-wrenches] Battery Back-up and Grid Tie</span></p></div></div><p class="MsoNormal"> </p><div><p class="MsoNormal">
Hi bill</p></div><div><p class="MsoNormal"> </p></div><div><p class="MsoNormal">Just how often is your grid down?</p></div><div><p class="MsoNormal"> </p></div><div><p class="MsoNormal">Jay</p></div><div><p class="MsoNormal">
Peltz power<br><br>Sent from my iPhone</p></div><div><p class="MsoNormal" style="margin-bottom:12.0pt"><br>On Apr 26, 2013, at 10:01 AM, Bill Turberville <<a href="mailto:billturb@ece-llc.com"><u><span style="color:blue">billturb@ece-llc.com</span></u></a>> wrote:</p>
</div><blockquote style="margin-top:5.0pt;margin-bottom:5.0pt"><div><p class="MsoNormal">I live in a TVA area where there is a Feed In Tariff. Everything that is generated by the PV array feeds into the grid through a Generation Meter that ties-in ahead of the house meter. I have started getting calls from customers who hate having a solar array that does not generate when the grid is down but the sun is shining, but who also want to get the $.12 premium when the grid is connected. We have lots of systems with SMA Sunnyboy inverters, but more with Enphase micro-inverters. Rather than trying to reinvent the wheel, what you found to be the best solution for this type of installation?</p>
<p class="MsoNormal"> </p><p class="MsoNormal">W.C. (Bill) Turberville P.E.</p><p class="MsoNormal">President</p><p class="MsoNormal"> </p><p class="MsoNormal">ECE Solar</p><p class="MsoNormal">Electrical Contracting Enterprises LLC</p>
<p class="MsoNormal">3080 Stage Post Road Suite 107</p><p class="MsoNormal">Bartlett, TN 38133</p><p class="MsoNormal"> </p><p class="MsoNormal">901-348-9230 ext 101 phone</p><p class="MsoNormal">901-348-2192 fax</p><p class="MsoNormal">
901-289-6346 cell</p><p class="MsoNormal"><a href="mailto:billturb@ece-llc.com"><u><span style="color:blue">billturb@ece-llc.com</span></u></a></p><p class="MsoNormal"> </p><p class="MsoNormal">NABCEP Certified PV Installation Professional 032611-320</p>
<p class="MsoNormal"> </p><p class="MsoNormal"> </p></div></blockquote><blockquote style="margin-top:5.0pt;margin-bottom:5.0pt"><div><p class="MsoNormal" style="margin-bottom:12.0pt">_______________________________________________<br>
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