[RE-wrenches] Battery based hydrogen incidents

Nick Soleil nicksoleilsolar at yahoo.com
Mon Dec 20 20:00:14 PST 2010


 Robb Cary was dealing with a lot of large scale telecomm systems with C&D 
Technologies, so his scary photos were probably not from solar projects, (if 
that is any comfort!)  He spoke of some projects with 50,000 2V industrial 
cells.  I have worked with him for a long time and served on the board of Solar 
Sebastopol with him 5-6 years ago.  I too have lost touch.  I tried to reach him 
four or five years ago but his office said that he was retired and his cell 
number was disconnected.

 Nick Soleil
Project Manager
Advanced Alternative Energy Solutions, LLC
PO Box 657
Petaluma, CA 94953
Cell:   707-321-2937
Office: 707-789-9537
Fax:    707-769-9037




________________________________
From: Darryl Thayer <daryl_solar at yahoo.com>
To: RE-wrenches <re-wrenches at lists.re-wrenches.org>
Sent: Wed, December 15, 2010 9:14:15 AM
Subject: Re: [RE-wrenches] Battery based hydrogen incidents


Yes they happen, Robb Cary of Battery Testing Co. has some frightening photos.  
I have lost contact with him however.  I have had an experiance, but I did not 
take pictures.  When you find the top of the battery and or battery enclousure 
blowen to smitherens it was a hydrogen explosion.  Sorry I am on road today, 
would love to comment more.  maybe later
Darryl

--- On Wed, 12/15/10, Warren Lauzon <warren at wind-sun.com> wrote:


>From: Warren Lauzon <warren at wind-sun.com>
>Subject: Re: [RE-wrenches] Battery based hydrogen incidents
>To: "RE-wrenches" <re-wrenches at lists.re-wrenches.org>
>Date: Wednesday, December 15, 2010, 11:05 AM
>
>
> 
>In the 30+ years that we have been in the solar business, we have never seen or 
>even heard of a single one.
>  
>From: Dana 
>Sent: Wednesday, December 15, 2010 9:10 AM
>To: 'RE-wrenches' 
>Subject: [RE-wrenches] Battery based hydrogen incidents
>  Ken – 
>  
>To meet the flow have run 2 and 3 fans to meet the flow. 2” output from the fan 
>into a 4” header with a matching 2.5” inlet as far away on the lowest portion of 
>the battery box.
> 
> 
>In 22+ years in off grid installations I have yet to see or even hear of one 
>hydrogen explosion. I get repeatedly asked why we have to go to the efforts we 
>go to for box and venting. I am not able to provide even one incident that I 
>have heard rumor of. 
>
>  
>Q - How many battery based hydrogen incidents have happened in our collective 
>experience? 
>
>  
>  
>  
>Dana Orzel
>Great Solar Works, Inc 
>E - dana at solarwork.com 
>V - 970.626.5253 
>F - 970.626.4140 
>C - 970.209.4076 
>web - www.solarwork.com 
>  
>"Responsible Technologies for Responsible People since 1988" 
>Do not ever belive anything, but seriously trust through action. 
>  
>From:re-wrenches-bounces at lists.re-wrenches.org 
>[mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of Kent Osterberg
>Sent: Tuesday, December 14, 2010 12:07 PM
>To: Wrenches
>Subject: [RE-wrenches] Battery Venting
>  
>Fellow Wrenches,
>
>The discussion about battery venting reminds me of a useful and inexpensive 
>program, BattMV, for determining ventilation requirements per EN-50272.  
>EN-50272 is a European standard used to determine how much air flow is needed 
>for a room, I don't know of a equivalent standard used in the U.S.  It takes a 
>surprising amount of ventilation.  For a 400-AH 48-volt L16 bank charged at 57.6 
>volts and 24 amps, it's about 7 CFM just to keep the %H2 down to 4%.  A 12-volt 
>Zephyr vent is good for about 5 CFM!   If you think you are venting enough, take 
>some time and study this issue.
>
>Kent Osterberg
>Blue Mountain Solar 
>
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