The other part of this is that all these things sound great, but single family homes with cars as the primary method of transport is a losing strategy for global sustainability. The best way to reduce global oil consumption is to reduce the number of trips people choose to take with cars.

Electric cars, V2H, that stuff is all something of a band-aid compared to building infrastructure that makes it safe and convenient for me to cycle to work or take the bus.

Even in the United States where single family homes are probably more prominent than anywhere else, something like 40% of people don’t live in a single family home.

There are much more cheaper and better suited batteries for houses built using other chemistries, they are bigger and heavier and that's fine for a house as long as they live 10y+.