[RE-wrenches] Lithium Ion Phosphate for grid back up

Dave Palumbo dave at independentpowerllc.com
Sun Aug 21 18:14:07 PDT 2011


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. 

 

Here's a link the client forwarded from his research.

http://currentevtech.com/Lithium-Batteries/Thundersky/Thundersky-40ah-cell-p
24.html

 

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. 

 

Also, what are your favorite inverter(s) for grid tied with battery backup?

 

David Palumbo

Independent Power LLC 

462 Solar Way Drive

Hyde Park, VT 05655

www.independentpowerllc.com 

NABCEP Certified PV Installer

Vermont Solar Partner

23 Years Experience, (802) 888-7194 

 

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