Using his concept of "first principles" Solar City isn't a long term viable business. Residential solar only makes sense as a sort of a green washing stepping

Using his concept of "first principles" Solar City isn't a long term viable business. Residential solar only makes sense as a sort of a green washing stepping stone to grid solar. I'm glad we did it and got the public excited about green energy, but solar panels should be installed in fields except in very exceptional cases.