If you set aside the pricing structure and just look at the underlying economics, the power grid will still be definitely needed for all the loads that are too dense for rooftop solar, ie industry, car chargers, office buildings, apartment buildings, and some commercial buildings. If every suburban house detached from the grid, these consumers would see big increases in their transmission costs, but they wouldn’t have much choice but to pay them. This might lead to a world where downtown areas and cities have electric grids, but rural areas and the sparser parts of suburbs don’t.
There’s an additional backup-power option not mentioned here, which is that some electric cars can feed their battery back to a house. So if there’s a long string of cloudy days but the roads are still usable, you can transport power from the grid to an off-grid house by charging at a public charger, and discharging at home. This might be a better option than a natural-gas generator, especially if it only comes up rarely.
If rural areas switch to a regime where everyone has solar+batteries, and the power grid only reaches downtown and industrial areas… that actually seems like it might just be optimal? The price of disributed generation and storage falls over time, but the cost of power lines doesn’t, so there should be a crossover point somewhere where the power lines aren’t worth it. Maybe net-metering will cause the switchover to happen too soon, but it does seem like a switchover should happen eventually.
If you set aside the pricing structure and just look at the underlying economics, the power grid will still be definitely needed for all the loads that are too dense for rooftop solar, ie industry, car chargers, office buildings, apartment buildings, and some commercial buildings. If every suburban house detached from the grid, these consumers would see big increases in their transmission costs, but they wouldn’t have much choice but to pay them. This might lead to a world where downtown areas and cities have electric grids, but rural areas and the sparser parts of suburbs don’t.
There’s an additional backup-power option not mentioned here, which is that some electric cars can feed their battery back to a house. So if there’s a long string of cloudy days but the roads are still usable, you can transport power from the grid to an off-grid house by charging at a public charger, and discharging at home. This might be a better option than a natural-gas generator, especially if it only comes up rarely.
If rural areas switch to a regime where everyone has solar+batteries, and the power grid only reaches downtown and industrial areas… that actually seems like it might just be optimal? The price of disributed generation and storage falls over time, but the cost of power lines doesn’t, so there should be a crossover point somewhere where the power lines aren’t worth it. Maybe net-metering will cause the switchover to happen too soon, but it does seem like a switchover should happen eventually.