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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