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I've been following the Li+ for a while, and the word is that the
Chinese made Li+ reliability is not quite there yet. About half of
your EV parts distributors carry them and half don't. <br>
I'm close to trying them on my next EV project, but I can't imagine
why you would try them on a project that weight isn't an issue (and
the possible charging head aches)<br>
HUP lead acid batteries have 2100 cycles to 80% DOD, and we know
that's a real number. <br>
I'd give it another 5 years for the prices to fall more, and the
reliability to improve. There are American made Li+ that are very
good, but also very expensive, and the military gets first dibs on
most of those.<br>
<br>
Ray Walters<br>
<br>
<br>
<br>
On 8/21/2011 8:14 PM, Darryl Thayer wrote:
<blockquote
cite="mid:1313979274.87674.YahooMailNeo@web39304.mail.mud.yahoo.com"
type="cite">
<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>
<div style="RIGHT: auto"><span style="RIGHT: auto"></span> </div>
<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>
<div style="RIGHT: auto"><span style="RIGHT: auto"></span> </div>
<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>
<div style="RIGHT: auto"><br style="RIGHT: auto">
</div>
<div style="FONT-FAMILY: arial, helvetica, sans-serif;
FONT-SIZE: 12pt">
<div style="FONT-FAMILY: times new roman, new york, times,
serif; FONT-SIZE: 12pt"><font face="Arial" size="2">
<b><span style="FONT-WEIGHT: bold">From:</span></b> Dave
Palumbo <a class="moz-txt-link-rfc2396E" href="mailto:dave@independentpowerllc.com"><dave@independentpowerllc.com></a><br>
<b><span style="FONT-WEIGHT: bold">To:</span></b>
'RE-wrenches' <a class="moz-txt-link-rfc2396E" href="mailto:re-wrenches@lists.re-wrenches.org"><re-wrenches@lists.re-wrenches.org></a><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>
<div id="yiv189840753">
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<div class="yiv189840753WordSection1">
<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>
<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">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
moz-do-not-send="true"
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>
<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">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>
<div class="yiv189840753MsoNormal"> </div>
<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</div>
<div class="yiv189840753MsoNormal"><b><i><a class="moz-txt-link-abbreviated" href="http://www.independentpowerllc.com">www.independentpowerllc.com</a>
</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>
<div class="yiv189840753MsoNormal"> </div>
</div>
</div>
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