Ray .. and everyone .. I've been consulting recently on a large off-grid project where the battery price is in the $300/kW-h range for a purchase quantity of 100,000 SCiB cells. That's actually a low cell count compared to the automotive industry. The cells can accept up to 8C charge/discharge without damage over a range of -30C to +55C. The most recent high-performance versions of these cells are spec'd to cycle from 100% to 0% DOD, with a performance reduction of less than 20% from new after 10,000 cycles. Consumer-grade versions of these cells are rated for 6,000 cycles, and I believe are priced accordingly.
If you do the math, this is very competitive with the price/performance and energy performance of L-A batteries. They're getting there.... Regards to all, Dan Lepinski -------------------------------------------- On Mon, 9/23/13, Ray Walters <r...@solarray.com> wrote: Subject: Re: [RE-wrenches] Li-I question To: "RE-wrenches" <re-wrenches@lists.re-wrenches.org> Date: Monday, September 23, 2013, 1:10 PM That's almost $2000/ kwh, which is close to 10 times the cost of the best lead acid. That doesn't seem to make sense for solar yet, but it would for electric vehicles because of the weight reduction. Possibly their price has dropped in 2 years? I'm seeing some other sources in the EV world selling 100 AH Li+ cells for about $450/ kwh, which is more like it. R.Ray Walters CTO, Solarray, Inc Nabcep Certified PV Installer, Licensed Master Electrician Solar Design Engineer 303 505-8760 On 9/22/2013 10:14 PM, Kevin Pegg wrote: I did get a quote from Corvus for one project back in Feb 2011. Client hasn't given go ahead yet. 12.4 kWh, ie 2 of their 8D format cells was going to set me back $24,000 CAD. The contract for purchase document is only slightly less complex than purchasing a home..... 14 pages worth of. Kevin _______________________________________________ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
