[RE-wrenches] Li-I question

[Kevin Pegg]

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
 <mailto:Allan at positiveenergysolar.com> 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 CorporationTM
3209 Richards Lane
Santa Fe, New Mexico 87507
505 424-1112 office 780-2738 cell
 <http://www.positiveenergysolar.com/> www.positiveenergysolar.com

 


 

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