Good work all, and to Mr. Nelson for pursuing. I am in the middle of
two battery designs, and I am hoping our inspector doesn't make the same
mistake. Now I can show this thread if so. Chris
On 7/30/2025 3:58 PM, MDElectricSolar via RE-wrenches wrote:
Yes! Thanks to all of the amazing wrenches who continually share their
vast knowledge and experiences.
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 12:47 PM, Jason Szumlanski via RE-wrenches
<[email protected]> wrote:
Whew! That is a relief. Good for you for taking it to the next level.
These inspectors can't keep claiming that the "industry is new." They
need to get with the times!
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 Wed, Jul 30, 2025 at 3:33 PM MDElectricSolar
<[email protected]> wrote:
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 <http://www.mdelectricsolar.com>
www.facebook.com/mdelectricandsolar
<http://www.facebook.com/mdelectricandsolar>
On Jul 30, 2025, at 12:21 PM, Jason Szumlanski via RE-wrenches
<[email protected]> 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
<[email protected]> 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 <http://www.millersolar.com/>
CA Lic. 773985
*From:*RE-wrenches
[mailto:[email protected]] *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.
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