[RE-wrenches] Fire Rating for Battery Room

Dave Angelini Offgrid Solar offgridsolar at sti.net
Fri Jun 6 11:09:42 PDT 2025


Any thoughts from me would be not to have large batteries, unless 
detached from the living space.

There is a ship out burning full of electric cars in the Pacific today. 
This is the 4th ship full of battery cars that I know of that has 
burned.

https://gcaptain.com/coast-guard-overflight-footage-reveals-fire-spreading-on-morning-midas-car-carrier-off-alaska-coast/

Dave Angelini Offgrid Solar
"we go where powerlines don't"
    [2]https://offgridsolar1.com/ [3]  [2]
e-mail  offgridsolar at sti.net
text 209 813 0060

On 2025-06-06 6:17 am, Nicholas Ponzio via RE-wrenches wrote:

> For those of you installing batteries inside homes how are you treating 
> this poorly-worded section of Code?
> 
> NFPA 855 - 15.4.2:
> _If the room or space where the ESS is to be installed is not finished 
> or non-combustible, the walls and ceilings of the room or space shall 
> be protected with not less than 5/8 in. Type X gypsum board._
> _ _
> This section of fire code has given us much consternation over the 
> years. Most installations in this climate are going into unfinished 
> basements. Are you all installing 5/8 sheetrock for the entire 
> basement? Just the area around the batteries? Something else?
> 
> Thanks in advance for any thoughts.
> 
> --
> Nicholas Ponzio
> Building Energy
> 1570 South Brownell Road
> Williston, VT 05495
> http://www.BuildingEnergyVT.com [1]
> 
> "Building Solutions for a Sustainable Future"
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Links:
------
[1] http://www.buildingenergyvt.com/
[2] http://members.sti.net/offgridsolar/
[3] https://offgridsolar1.com/
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