In any case full electric cars allow centralized power generation, in turn allowing more opportunities for clean power.
But, for 95% of trips, an overnight charge at 120V is sufficient.s
In theory. I can see at least a couple of challenges in making such a system feasible. It's not like you can just shove the batteries into a massive underground tank, for example.
An electric vehicle is more specialized as a every-day commuter vehicle. It is cheaper in that duty.
Like a gas car, your cell phone can do anything your desktop can do, but your desktop is better suited for some tasks (i.e. faster for writing letters) even if its mobility is less.
I remember when I was in the Army that our 5-ton dump trucks had lots of onboard stuff running off pressurized air, presumably making the vehicle more durable to electrical failures
Combine with local stored fossil fuels, and basic mobility/counter-mobility, and you have a harder-to-cripple ground force.