My Powerwall 2 with Backup Gateway 2 was installed in July and is working well. I had my Model S charger wired into the NON-backup side so that the Model S didn't empty the powerwall during a night grid outage. I'm on a dual rate tariff, and in Advanced cost saving mode, so the powerwall charges from the grid during the night rate period and the car is timed to charge at night too, which it does from the grid. That all works fine. During the peak period, usually, the powerwall supplies all the house load. I carried out an experiment today. I set the Model S to start charging during the Peak rate period. As it's wired into the NON-bbackup side, in other words directly from the electricity meter via the Gateway NON-backup side, I expected it to take tall the power from the grid, not the powerwall. The Model S cranked up to 8kW load. In fact what happened was that it drew the maximum 5kW from the powerwall and the rest, plus the house load - 3.3kW, from the grid. Is this normal behaviour? I suppose it makes sense in that it's charging the car from the cheap rate electricity stored in the Powerwall and would only draw Peak rate electricity once the powerwall was empty, although then there would be no backup reserve left, except the reserve level set in the app.