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Powerwall with Combination Service Panel

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i think you'll would have to add a backed up loads panel (sub panel off of main panel).

calmdl3, is white pvc your emergency condensate drain from your air handler? usually you want that over a window... is that a terror watt flood light!?!?
Yes the white PVC is the AC condensate drain. It comes from inside the house via a electric pump and then is drained on the other side of the sidewalk into a 3' x 3' x 3' gravel filled pit. That is the current code in California.

The sub-panel is what I heard from others as well. Basically, strip out the main service panel of all breakers and install new 200 amp breaker in MSP to feed a new subpanel that sits between the gateway and the main panel.