Interconnect is going to be old news once batteries and balance-of-system costs get low enough. Local microgrids at the substation level are going to be the way to go, with only a minority of current traveling long distances (except for certain natural features, i.e. hydroelectric)
Our car can run our all-electric house for days. We have more than one car.
It’s not clear to me how much the power grid will matter in ten years. I can imagine cities using substations to route N solar installations to M bidirectional EV chargers, I guess. For places as or less dense than suburbs, it’s not obvious that it makes sense to bother.
Our home battery has had ~ 10 minutes of scheduled downtime in three years, and the solar array we put in (which was limited in size by our power company) would be enough for 90+% of days. The grid has had 30+ days of downtime in that time.
If we had it fill the south half of our roof, that’d jump to 99-100%. For the remaining one percent, we could just drive to a fast charger to pick up enough electricity to run the house for 2-3 days in complete darkness.
The power grid keeps burning cities down, and then they pass the cost on to consumers.
Off grid is already more reliable than the grid, and the price of it keeps halving. At the same time, extreme weather events keep increasing the cost of the grid and lowering its reliability.
If the power company would bury their lines, then all of these issues would go away, but that will never happen with our current political system.
This argument is undermined by survivorship bias. I also don't believe the power grid keeps "burning cities down", this seems very specific to the area you live and the competency of the local government.
