NEC 2017,705.12(B)(2)(3)(C) all loads removed from the main panel

[balou]

I have a contractor in CA who wishes to use a 100 amp main panel with all breakers removed and moved to a 200 amp criticial loads sub panel fed thru the inverter. Leaving only a 100 amp breaker in the main panel. Using NEC 2017,705.12(B)(2)(3)(C) to justify the condition.
Then adding 60 amps of solar and 2 Teslea battery's connected to the inverter and gateway then to the lone 100 amp breaker in the main panel
The contractor has sent me plans, approved by a very large city in our area.
I'm just not sure if it meets the intent of the section " both load and supply" ,with the solar installed in another panel.
By the way the load calc for the existing panel is 98.7 amps if its correct in the field. No other loads may be added ever...

 

[jaggedben]

The idea of moving all the loads to a separate panel is legit and meets the intention of the code section you are citing.

Comments:
1) They'll need to have the Tesla batteries setup to limit export to the grid according to their Power Control Systems listing. That's because the 60A of solar and 2 Powerwalls output exceeds the rating of the service.
2) Sounds like this customer should really be getting a main panel upgrade instead, unless perhaps there's a cost-prohibitive reason such as having to upgrade an underground service.