Yes, I think this is the best way to do it. It may also make sense to tax residential power to fund roads, since many electric car owners will primarily be charging at home. Perhaps this electricity tax could be limited to people who are registered as owning electric cars. That would follow the same principle of applying the tax where the fueling/charging is performed.

It's likely most electricity for EVs will be consumed at home, though.

In Germany, water used for watering your lawn is taxed differently from water you use to fill your tub. I'm sure we could mandate a separate meter for recharging cars.

Just curious, are there 2 meters?

(I think we do it smarter for electricity: the first x kWh at one rate, then up from there, among other billing complexities).

AFAIK: If you want to claim cheaper rate for part of it, you need to install a second certified meter for that part. If you are willing to go by default rate (which at least in some places assumes some ratio) you don't.

Ah. I guess this is all because you don’t get charged for sewerage on the lawn watering.

That's how it's done everywhere I know of in the US. You do have to pay a bit more to have the second meter, but since sewage treatment is often more expensive than initial water treatment, you save quite a lot on balance.

Can confirm, I’ve seen a dual-meter setup for garden water in Germany.

But regardless of whether you charge your EV at home or at a supercharger, you will almost certainly be using it on public roads.