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.
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.
The Li batteries no maintenance, 3000 to 5000 deep cycles, I want them, but I
can't afford
Darryl
From: Dave Palumbo <d...@independentpowerllc.com>
To: 'RE-wrenches' <re-wrenches@lists.re-wrenches.org>
Sent: Sunday, August 21, 2011 8:14 PM
Subject: Re: [RE-wrenches] Lithium Ion Phosphate for grid back up
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-p24.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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