Electricity is instant, liquid can be stored.
Electricity can be manufactured from the Sun with nothing other than a flat piece of silicon. It can be manufactured with a windmill, or small-scale hydro, or even a plain old gas-powered generator if all else fails. Using electricity as a fuel source has all the flexibility of gas with the added flexibility of being able to use other easily accessible methods to manufacture it.
And gas can only be stored for so long. Electricity can be manufactured forever.
Everything has tradeoffs, and electricity can't escape that. However, flexibility and accessibility in SHTF is not one of them.
I am looking at the macro level with society. Your steps are ideal for the individual who has the property or the wealth to afford solar capacity to charge their car every day and power their house.
Assuming all cars are EVs today, if they shutoff electricity to a quadrant of the country, no one has the ability to move, those already on the road traveling will be stuck where they are at currently. They will have no ability to charge.
Right now today, if the grid goes down in a quadrant of the country, the entire petroleum production and distribution can be powered by the fuel itself. At least allowing tankers to get to many stations. If the fuel system is cut it will take time before it diminishes to zero, also fuel can be transported in by truck from another area of the country. But overall it will take time to halt society, too slow for TPTB needs.
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