Re: [RE-wrenches] Battery RSD

[MDElectricSolar via RE-wrenches]

I emailed and eventually spoke with the building inspector supervisor and got him to agree that what they're looking for is an AC disconnect, within sight of the ESS which disconnects and locks open any connection to the house. He was going to reiterate to his inspectors that it is not between the battery and the inverter.  Michael D Nelson MD Electric & Solar, Inc. 707-684-0064 mobile 707-884-1862 office www.mdelectricsolar.com www.facebook.com/mdelectricandsolar On Jul 30, 2025, at 12:21 PM, Jason Szumlanski via RE-wrenches <re-wrenches@lists.re-wrenches.org> wrote:  True, but a suitable DC rated disconnect switch with large enough terminals is going to be very expensive. The whole thing boils down to the definition of an ESS. Getting the inspector to realize that the 706.2 disconnect is not required to be a battery disconnect is key here. Jason Szumlanski Principal Solar Designer | Florida Solar Design Group NABCEP Certified Solar Professional (PVIP) Florida State Certified Solar Contractor CVC56956 Florida Certified Electrical Contractor EC13013208 On Tue, Jul 29, 2025 at 11:38 PM William Miller via RE-wrenches <re-wrenches@lists.re-wrenches.org> wrote: Jason:   Fine stranded cables can be used with set screw terminals if you use ferrules.   You hint at a broader point:  The industry is not providing solutions that the regulators are demanding.  Any battery with BMS should have a remote inhibit.  Problem solved.   William   Miller Solar 17395 Oak Road, Atascadero, CA 93422 805-438-5600 www.millersolar.com CA Lic. 773985     From: RE-wrenches [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Jason Szumlanski via RE-wrenches Sent: Tuesday, July 29, 2025 2:45 PM To: RE-wrenches Cc: Jason Szumlanski Subject: Re: [RE-wrenches] Battery RSD   The problem I see with just complying is that there is really no practical or cost-effective way to comply. You would have to somehow transition from battery cable to some other cable type, because typical fusible disconnect switch lugs are not going to be rated to accept fine-stranded battery cable, especially in the required size.    _______________________________________________ List sponsored by Redwood Alliance Pay optional member dues here: http://re-wrenches.org List Address: RE-wrenches@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 _______________________________________________ List sponsored by Redwood Alliance Pay optional member dues here: http://re-wrenches.org List Address: RE-wrenches@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

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