<html><body><div style="color:#000; background-color:#fff; font-family:arial, helvetica, sans-serif;font-size:12pt"><div style="RIGHT: auto"><SPAN style="RIGHT: auto">your numbers sound to good. My limited to one experiance is $15,000 for 10 kWh you are talking 33600 kWh for same money. The local people who are putting 5 kWh in to preius cars are $5,000 for 5kWh both of these setups have elaborate battery managment systems. One of my competors puts 10 kWh Lead acid in for $1500, and no elaborate charging system. </SPAN></div>
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<div style="RIGHT: auto"><SPAN style="RIGHT: auto">I have gotten more than 10 years on a set of Rolls Surrette batteries, with proper care. I have a sealed AGM with almost 5 years, so whAT IS THE ADVANTAGE? It is said that the Li can do 5 times the cycles, but I can replace. </SPAN></div>
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<div style="RIGHT: auto"><SPAN style="RIGHT: auto">The Li batteries no maintenance, 3000 to 5000 deep cycles, I want them, but I can't afford</SPAN></div>
<div style="RIGHT: auto"><SPAN style="RIGHT: auto">Darryl<VAR id=yui-ie-cursor></VAR> </SPAN></div>
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<DIV style="BORDER-BOTTOM: #ccc 1px solid; BORDER-LEFT: #ccc 1px solid; PADDING-BOTTOM: 0px; LINE-HEIGHT: 0; MARGIN: 5px 0px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; HEIGHT: 0px; FONT-SIZE: 0px; BORDER-TOP: #ccc 1px solid; BORDER-RIGHT: #ccc 1px solid; PADDING-TOP: 0px" class=hr contentEditable=false readonly="true"></DIV><B><SPAN style="FONT-WEIGHT: bold">From:</SPAN></B> Dave Palumbo <dave@independentpowerllc.com><BR><B><SPAN style="FONT-WEIGHT: bold">To:</SPAN></B> 'RE-wrenches' <re-wrenches@lists.re-wrenches.org><BR><B><SPAN style="FONT-WEIGHT: bold">Sent:</SPAN></B> Sunday, August 21, 2011 8:14 PM<BR><B><SPAN style="FONT-WEIGHT: bold">Subject:</SPAN></B> Re: [RE-wrenches] Lithium Ion Phosphate for grid back up<BR></FONT><BR>
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<div class=yiv189840753MsoNormal><SPAN style="FONT-FAMILY: 'sans-serif'; FONT-SIZE: 10pt">We have a potential client for a net metered PV with battery backup system with a serious interest in using lithium ion storage batteries. I do not know of any systems that have used these batteries yet. From some quick calcs I come up with 105 LiFEYPo4 3.2 volt cells. 7 strings of 15 cells for 700 AH at 48 volts. Price is quoted at $ 125 per cell. </SPAN></div>
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<div class=yiv189840753MsoNormal><SPAN style="FONT-FAMILY: 'sans-serif'; FONT-SIZE: 10pt">Here’s a link the client forwarded from his research.</SPAN></div>
<div class=yiv189840753MsoNormal><SPAN style="FONT-FAMILY: 'sans-serif'; FONT-SIZE: 10pt"><A href="http://currentevtech.com/Lithium-Batteries/Thundersky/Thundersky-40ah-cell-p24.html" rel=nofollow target=_blank>http://currentevtech.com/Lithium-Batteries/Thundersky/Thundersky-40ah-cell-p24.html</A></SPAN></div>
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<div class=yiv189840753MsoNormal><SPAN style="FONT-FAMILY: 'sans-serif'; FONT-SIZE: 10pt">What are the reasons why these are not being used in home power systems? The web site states 3,000 cycles at 80% DOD vs. 750 cycles for typical gel storage batteries. </SPAN></div>
<div class=yiv189840753MsoNormal><SPAN style="FONT-FAMILY: 'sans-serif'; FONT-SIZE: 10pt"> </SPAN></div>
<div class=yiv189840753MsoNormal><SPAN style="FONT-FAMILY: 'sans-serif'; FONT-SIZE: 10pt">Also, what are your favorite inverter(s) for grid tied with battery backup?</SPAN></div>
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<div class=yiv189840753MsoNormal>David Palumbo</div>
<div class=yiv189840753MsoNormal>Independent Power LLC </div>
<div class=yiv189840753MsoNormal>462 Solar Way Drive</div>
<div class=yiv189840753MsoNormal>Hyde Park, VT 05655<B></B></div>
<div class=yiv189840753MsoNormal><B><I>www.independentpowerllc.com </I></B></div>
<div class=yiv189840753MsoNormal>NABCEP Certified PV Installer</div>
<div class=yiv189840753MsoNormal>Vermont Solar Partner</div>
<div class=yiv189840753MsoNormal>23 Years Experience, (802) 888-7194 </div>
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