I'm in So Cal, on SCE, residential single-phase utility power, pre-PTO since May 5 with 11.2 kW of solar, a Powerwall+ with the 7.6 kW Tesla Inverter, Powerwall 2, and Gateway Backup 2. The app powerwall settings show Self-Powered and 'No" for Permission to Export. Backup reserve is set at 20%...