That setup is a dream for a lot of people, but it's not always easy to make happen depending on state regulations (and how powerful the utilities there are)...
Seems like the utilities aren't involved at all?
Cheap storage actually makes grid defection a possibility for a ton of people these days. Especially when you start considering the cost of upgrading 100 amp service to 200 amp or similar. Once you've added a bit of battery, might as well go a bit more, and use your vehicle for additional backup when necessary.
People having 70kWh or more of mobile battery in the garage is going to change the calculation for a lot of people. Many people who would never install solar unless it saves them money will also spend a tooooooon of money on a big truck for aesthetic reasons, and then find that it makes solar a cheaper propositon.