[RE-wrenches] Tesla Powerwall Emergency Stop Button

[Ray]

Has anyone looked at NEC 2020?  Articles 480.7(B) /Storage Batteries/ 
and 706.15 (A)/Energy Storage Systems/ both require an external 
emergency disconnect for the batteries. That "may" be what the AHJ is 
thinking?  Off grid design never got to be so much fun....

Ray Walters
Remote Solar
303 505-8760

On 7/22/20 8:40 AM, Lorenzo Ortiz wrote:
> Wrenches,
>
> Does anyone have experience installing an 'Emergency Stop Button' for 
> Tesla Powerwall or similar energy storage systems? Not a knife-blade 
> disco but a low-voltage 'plunger' style button that shuts down all 
> power (even in backup mode) for first responders.
> Our AHJ has been forcing us to install gigantic 200A discos between 
> our ESS and the main service. Tried explaining that these systems are 
> designed to operate when the power goes out so the disco is next to 
> useless but... AHJs will be AHJs...
>
> I've attached a pic to give an idea of what I'm looking for. Hoping to 
> find a reliable option, with the following characteristics:
> *• Must be Lockable on ON/OFF position
> • Must have a clear indication of ON/OFF position
> • Must be outdoor rated (NEMA 3R or higher)
> • Should observe 12V, 0.1 A ratings*
>
> Thanks
>
> -- 
> __
>
> Loren Ortiz
> Technical PV Design Specialist - Worker Owner/Board Member
>
> loren at cal-solar.com <mailto:loren at cal-solar.com>californiasolarco.com 
> <http://californiasolarco.com>
> *Main:530-274-3671 ext: 311 ****Fax:530-274-7518*
>
> **
>
>
>
>
> <https://californiasolarco.com/referral_form/>
> *Showroom located at: 149 E Main St. Grass Valley, CA 95945*
>
> _______________________________________________
> List sponsored by Redwood Alliance
>
> 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
>
> List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org
>
> List rules & etiquette:
> www.re-wrenches.org/etiquette.htm
>
> Check out or update participant bios:
> www.members.re-wrenches.org
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.re-wrenches.org/pipermail/re-wrenches_lists.re-wrenches.org/attachments/20200722/4828b478/attachment.htm>