Powerwall Capacity.

[miimura]

I do not have any such panel. The gateway goes directly to my main 200 amp panel, no sub panel of any kind. This is with 2 Powerwalls and solar. There is a breaker in the gateway to take the system off-grid.

This is a true whole house setup. However, not all main panels or meters are structured in such a way that they can redirect the main feed to the gateway ahead of the existing main panel.

 

[cwied]

An illustration of @miimura's point. My main panel has an integrated meter. This is how they installed my whole-house, two Powerwall system: