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<div class="moz-cite-prefix">I'd try a set with a few adventurous
customers, but the price needs to be really good for Beta
testing. Once you get a couple of years of proof of concept, and
work out the charging details, etc. then your friend could set the
price higher. Its all about amp hours and cycle life. If he can
prove reliable performance for 300 or deep cycles, it could be
worth while.<br>
I definitely get inquiries. Also some of us dabble in electric
vehicles, where Li+ has more advantages. Why were they taken out
of service?<br>
<pre class="moz-signature" cols="72">R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified, Licensed Contractor
808 269-7491</pre>
On 2/20/2013 10:14 AM, William Korthof wrote:<br>
</div>
<blockquote
cite="mid:CAC8Bd06ztoN6zDBbtB-_6pL7Dm=Ev=XQzqUDzRgWWtGikXpS+Q@mail.gmail.com"
type="cite">Anyone have experience using lithium batteries for
solar and/or backup power applications? <br>
<br>
A friend in the EV development business has access to a large
number of used EV battery packs that still have a good deal of
life left in them. He's looking to find a market for them and
solar/backup power seems potentially like a good application. <br>
<br>
The batteries were configured as ~100 amp-hour nominal blocks,
consisting of 2 series cell blocks (4.1 vdc open circuit). <br>
The simple path I suggested was to start with 7-block packs (14
cells = ~56 vdc full charge) and battery management control. <br>
The battery performance is excellent, and they should have a lot
of life left, and are move compact/light weight than leads <br>
(something like 50% less volume, and 70% less weight)---but are
more geared toward power and high voltage to match the <br>
needs for automotive usage. Penciling it out, it seems plausible
that these could be priced competitive with new lead group <br>
31 lead acid batteries... <br>
<br>
I'm curious what is available (lithium) and if anything has a
track record or cost benchmarks. Also curious what kind of <br>
interest there might be in this kind of secondary battery
offering. <br>
<br>
William Korthof<br>
Sustainable Solutions<br>
<br>
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