My house is now hooked up to the generator in the road. I have knocked on the front doors of my neighbours, either side and opposite to explain it will be running for at least a couple of days. It rumbles like an idling engine. Because that is what it is I suppose.
Powerwall can detect an outage, disconnect from the grid, and automatically restore power to your home in a fraction of a second. You will not even notice that the power went out. Your lights and appliances will continue to run without interruption.
If you have solar and Powerwall, then solar energy will continue to power your home and recharge Powerwall. Without Powerwall, solar will shut down during an outage.I am starting to think that my previous indifference to Elon Musk's Tesla Powerwall (https://www.tesla.com/en_GB/powerwall) may have been premature and short sighted.