[RE-wrenches] Large Residence ESS and NFPA 855

[Brian Mehalic]

I'm not looking at the most recent editions right, but the previous
versions of both 855 and the IRC both have statements to the effect of "ESS
installations exceeding the permitted individual or aggregate ratings shall
be installed in accordance with Section xxx" (pointing to the IFC in the
case of the IRC, and pointing to Chapters 4-9 in the case of 855), in other
words basically follow the (more onerous) rules for ESS on other than one-
and two-family dwellings.

Brian Mehalic
NABCEP Certified Solar PV Installation Professional™ R031508-59
National Electrical Code® CMP-4 Member
(520) 204-6639

Solar Energy International
http://www.solarenergy.org



On Thu, May 30, 2024 at 3:17 AM Jason Szumlanski via RE-wrenches <
re-wrenches at lists.re-wrenches.org> wrote:

> Has anyone dealt with a large ESS installation that exceeds the aggregate
> storage limits in NFPA 855? The limits are quite low for very large single
> family homes. I have a situation where we need 120 kWh minimum for an
> off-grid home. There is a building dedicated for the inverters and
> batteries that is 400 feet from the main home. The intent was to house the
> batteries there, but we are in excess of the 80 kWh limit for an accessory
> structure. It would be impractical to house part of the batteries on an
> exterior wall.
>
> Are there any "loopholes" that might allow this larger ESS for this
> property? And if not, has anyone attempted to comply with Ch 4-9? That
> seems onerous.
>
> Jason Szumlanski
> Florida Solar Design Group
> _______________________________________________
> List sponsored by Redwood Alliance
>
> Pay optional member dues here: http://re-wrenches.org
>
> List Address: RE-wrenches at lists.re-wrenches.org
>
> Change listserver email address & settings:
> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
>
> There are two list archives for searching. When one doesn't work, try the
> other:
> https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/
> http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org
>
> List rules & etiquette:
> http://www.re-wrenches.org/etiquette.htm
>
> Check out or update participant bios:
> http://www.members.re-wrenches.org
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org/attachments/20240530/d9b6767e/attachment.htm>