Battery Bank Venting [RE-wrenches]

[Darryl Thayer]

Be careful of thermal runaway.  Do not parallel
strings. with this caveats I think it is safe to have
these batteries indoors.   Has  anyone tried a
hydrogen sensor, I have heard that the hydrogen will
rise faster than diffuse, So a hydrogen sensor in the
top of a sealed cover should detect hydrogen before
any accumulation. 

A properly operating AGM should not release any H2,
but of course thermal runway or excessive charge rate
will fry the batteries.  
Darryl
  
--- Richard Bogan <rbogan at empire-solar.com> wrote:

> 
> 12
> 
> Richard J. Bogan 
> NABCEP Certified Solar PV Installer (r) 
> Solar Operations Manager | Empire Solar Solutions,
> LP
> cell 562-755-7389 | fax 708-202-6144
>  
> -----Original Message-----
> From: Mark Frye [mailto:markf at berkeleysolar.com] 
> Sent: Thursday, April 24, 2008 4:05 PM
> To: RE-wrenches at topica.com
> Subject: RE: Battery Bank Venting [RE-wrenches]
> 
> 
> How many of these sealed batteries do you intent to
> install?
>  
> Mark Frye
> Berkeley Solar Electric Systems
> 271 Vistamont Dr
> Grass Valley CA 95945
> (530) 401-8024
> www.berkeleysolar.com 
> 
> -----Original Message-----
> From: Richard Bogan [mailto:rbogan at empire-solar.com]
> 
> Sent: Thursday, April 24, 2008 4:03 PM
> To: RE-wrenches at topica.com
> Subject: Battery Bank Venting [RE-wrenches]
> 
> 
> Hello wrenches,
> 
> We have a battery back-up / interconnected system
> utilizing PVX-2580L
> Sealed
> AGM SunXtender batteries. The battery bank will be
> located inside a
> utility
> room which is part of a large 2000 sqft underground
> garage.
> The room has mechanical venting out into the garage.
> The garage has
> 8-10'
> ceilings and a large double garage door that goes up
> to ground level.
> It
> also has a couple of doors to finish portions of the
> basement (wine
> cellar,
> maid quarters, Rec. room) and 2 stairways up to the
> first floor living
> area.
> 
> 
> Standard practice for us is to have venting but in
> this case the
> basement
> walls are ~16" solid concrete walls with no
> available openings for a fan
> to
> push air outside. We contacted the battery
> manufacture and they gave us
> a
> reality scenario where the chances of enough
> hydrogen to accumulate in
> this
> large of area to reach an explosive level is
> impossible BUT, they are
> not
> fire experts and we should consult with our local
> fire department for
> guidance. 
> 
> If we have to we will core a hole into the
> foundation install a fart fan
> and
> ducting but, I wanted to get your thoughts before
> that fun job.
> 
> Thank you!
> 
> Richard J. Bogan
> NABCEP Certified Solar PV Installer (r) Solar
> Operations Manager |
> Empire
> Solar Solutions, LP
> 
> 
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