Their home:
A 4 bedroom home in a beach side with so much roof space to place 30 panels. Their property is perfect for solar with plenty of sun, The panels tilted to the north for maximum efficiency.
The 9.9kW Solar panels with Tesla power wall 2 enable the system to run off grid in black out which has happened a few time last year. Means the solar charge the Tesla battery and the Battery powers the house no need for Grid.