[RE-wrenches] Li-I question

[Ray Walters]

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
>
>     -----Original Message-----
>     *From:* re-wrenches-bounces at lists.re-wrenches.org
>     [mailto:re-wrenches-bounces at lists.re-wrenches.org]*On Behalf Of
>     *Ray Walters
>     *Sent:* September 19, 2013 9:51 PM
>     *To:* RE-wrenches
>     *Subject:* Re: [RE-wrenches] Li-I question
>
>     Looks interesting,  I've been waiting for Li+ to start making
>     sense on larger scales.
>     The cycle life does not appear to be better than a HUP lead acid
>     battery, despite the claims of "10 times the cycle life of an AGM
>     battery"  I'm confused because in their white paper they also
>     claim: 200 cycles at 100% DOD < 2000 cycles at 80% DOD > 3000
>     cycles at 80% DOD.
>     What does that mean?
>     Also the warranty has 3 yr free replacement, 10 yr prorated, but
>     doesn't cover shipping or installation, and also demands an
>     engineering evaluation of the installation to allow the warranty. 
>     Despite their claims of being the most comprehensive warranty in
>     the business; it is not.
>     My entire power tool collection as well as my computer and phone
>     run on Li+, so I'm a believer, but I've also been vetting BS
>     claims in our industry for over 2 decades.  Corvus needs to put
>     more time into some BCI cycle life charts, and provide a warranty
>     that covers shipping and installation time like others.  Some case
>     studies, and independent testing would help as well.
>     Anybody have any ball park pricing on this?
>
>     R.Ray Walters
>     CTO, Solarray, Inc
>     Nabcep Certified PV Installer,
>     Licensed Master Electrician
>     Solar Design Engineer
>     303 505-8760
>
>     On 9/19/2013 9:58 PM, Kevin Pegg wrote:
>>     These folks are real I've met with and touched the product. I've
>>     been working on a possible use of these but client hasn't said go
>>     yet so can't quite yet vouch for the product.
>>     http://www.corvus-energy.com/
>>     Kevin
>>
>>         -----Original Message-----
>>         *From:* re-wrenches-bounces at lists.re-wrenches.org
>>         [mailto:re-wrenches-bounces at lists.re-wrenches.org]*On Behalf
>>         Of *Allan Sindelar
>>         *Sent:* September 16, 2013 12:58 PM
>>         *To:* RE-wrenches
>>         *Subject:* [RE-wrenches] Li-I question
>>
>>         Wrenches,
>>         In order to provide accurate information about lithium-ion
>>         batteries, I'm looking for referrals to current suppliers
>>         with available product, with specifications and retail
>>         pricing available. Having read Randy Richmond's article on
>>         Li-I in HP153 earlier this year and Dan Fink's posts here, I
>>         understand the advantages and limitations. I am just looking
>>         for actual supplier websites and contacts, please.
>>         Thank you,
>>         Allan
>>         -- 
>>
>>         *Allan Sindelar*
>>         _Allan at positiveenergysolar.com_
>>         <mailto:Allan at positiveenergysolar.com>
>>         NABCEP Certified PV Installation Professional
>>         NABCEP Certified Technical Sales Professional
>>         New Mexico EE98J Journeyman Electrician
>>         Founder and Chief Technology Officer
>>         *Positive Energy, Inc.*, a Certified B Corporation^TM
>>         3209 Richards Lane
>>         Santa Fe, New Mexico 87507
>>         *505 424-1112 office 780-2738 cell*
>>         _www.positiveenergysolar.com_
>>         <http://www.positiveenergysolar.com/>
>>
>>
>>
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