Which is one of the logical conclusions of products like the PowerWall. I think the current model can only run like 25 amps but an in house fast charger that can pull 10 or 20 amps during off peak hours and dump 60 amps when charging the car could be a cheaper installation.

Hell if the PowerWall 3 could dump 40 amps you could pull 20 from the wall at the same time and hit your 60 amp total.