[RE-wrenches] Combining Powerwall 3

[Chris Sparadeo]

Agreed, wrenches is a life saver. I happily paid my dues as well.

My mind was blown last week when I found that the GM Home Hub MID does not
ship with an internal non-backed up loads terminal and an Eaton 24INT125B-1
bus is required. This part is $125 by itself but if you buy the BRL125SP
subpanel (which includes this exact same busbar) the entire subpanel is
only $28.

On Wed, Sep 24, 2025 at 4:54 PM Jason Szumlanski via RE-wrenches <
re-wrenches at lists.re-wrenches.org> wrote:

> This is why the Wrench list is awesome. I'm making a second annual
> donation to the list based on this answer alone. Michael: Blake gets all
> the credit.
>
> Of course, my Eaton rep said it wasn't possible. That's better than SqD
> and ABB that told me it would work, but it didn't.
>
> We used to use those same Eaton hold down kits on Enphase IQ combiner,
> which used Eaton busbars, so I should have known it was possible.
>
> Thanks again. My local shop has 5 in stock. I'm good to go tomorrow!
>
> 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, Sep 24, 2025, 4:39 PM Blake Gleason <blake at sunlightandpower.com>
> wrote:
>
>> Eaton has a 125A panel that can take two hold down kits.  I happen to be
>> installing three of them today ...
>>
>> BR816L125RP
>>
>>
>>
>> Blake Gleason, PE | Employee Owner
>> Director of Innovation and Technical Excellence
>> O: 510-845-2997 x128
>> C: 510-867-5878
>> [image: sunlightandpower.com] <http://sunlightandpower.com/>
>>
>> <https://linktr.ee/SLP_Socials>
>>
>> 1035 Folger Ave.
>> <https://www.google.com/maps/search/1035+Folger+Ave.+Berkeley,+CA+94710?entry=gmail&source=g>
>> Berkeley, CA 94710
>> <https://www.google.com/maps/search/1035+Folger+Ave.+Berkeley,+CA+94710?entry=gmail&source=g>
>> www.sunlightandpower.com
>> License #326203
>>
>> <https://benefitcorporationsforgood.com/> [image:
>> https://www.amicussolar.com/] <https://www.amicussolar.com/> [image:
>> https://calssa.org/] <https://calssa.org/>
>>
>> On Wed, Sep 24, 2025, 1:37 PM Jason Szumlanski via RE-wrenches <
>> re-wrenches at lists.re-wrenches.org> wrote:
>>
>>> I have a situation with a utility company that requires us to have a
>>> single visible load break disconnect switch that isolates only the
>>> "renewable sources" without disconnecting the house loads. To do this, the
>>> only way possible seems to be combining the inverters in a load center and
>>> then using the main lugs in the load center to go to a fusible disconnect
>>> switch, and then the backup load lugs in the Gateway 3.
>>>
>>> The problem with that is I have not been able to find a 125 amp load
>>> center that accepts multiple backfed breaker fasteners. Square D has a 100
>>> amp load center that accepts two breaker hold down kits, but for two
>>> Powerwalls we need 125A.
>>>
>>> Other than going to a panel board with bolt on breakers, can you think
>>> of any other way to comply?
>>>
>>> Jason Szumlanski
>>> Florida Solar Design Group
>>> We
>>>
>>> _______________________________________________
>>> 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
>>>
>>> _______________________________________________
> 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/20250924/b7a2c45c/attachment-0001.htm>