[RE-wrenches] Combining Powerwall 3

[Jason Szumlanski]

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
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> 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
>>
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