I almost have this dream set up myself. I have solar on my house, an electric car, but not a battery but feed into the grid... yet (i have some old posts i did when i first start here 3 weeks ago about my system and car).
I will have to see if this powerwall can be added to my system and if so, i may add more panels to help cover all my miles on my car. Love not having to pay oil and energy companies my hard earned money. Thanks for the awesome article, i will resteem it too!