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.
I definitely get inquiries. Also some of us dabble in electric
vehicles, where Li+ has more advantages. Why were they taken out of
service?
R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified, Licensed Contractor
808 269-7491
On 2/20/2013 10:14 AM, William Korthof wrote:
Anyone have experience using lithium batteries for solar and/or backup
power applications?
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.
The batteries were configured as ~100 amp-hour nominal blocks,
consisting of 2 series cell blocks (4.1 vdc open circuit).
The simple path I suggested was to start with 7-block packs (14 cells
= ~56 vdc full charge) and battery management control.
The battery performance is excellent, and they should have a lot of
life left, and are move compact/light weight than leads
(something like 50% less volume, and 70% less weight)---but are more
geared toward power and high voltage to match the
needs for automotive usage. Penciling it out, it seems plausible that
these could be priced competitive with new lead group
31 lead acid batteries...
I'm curious what is available (lithium) and if anything has a track
record or cost benchmarks. Also curious what kind of
interest there might be in this kind of secondary battery offering.
William Korthof
Sustainable Solutions
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