Denmark doesn't really have "remote areas" by the standards of large countries.

Here's a map of the high voltage power grid. I don't think anywhere is more than 50km from a transmission line.

https://en.energinet.dk/-/media/9160AAB5C484432399767220B78D...

The increase will be gradual, and no doubt the power grid company is already planning for it.

> Delivering high voltage to recharge the amperage these batteries need is a whole different grid in remote areas to delivering 240v for light bulbs and fridges.

If they have 240v outlets, that's half the battle. That is around 31 miles per hour of charge, from a standard outlet (although you have to make sure your wiring is good) without any extra infrastructure.

This may not be sufficient for a cross-country drive across the continental US, but for most european countries? You can drive 300 miles and charge overnight even with no fast charging at all.

Compare this with setting up gas stations (digging underground to install the tanks, logistics to keep them topped off, etc) and gasoline starts to look quite insane. It's just that we have this existing infrastructure built over a century that we take for granted.

I don't know what the situation is in Europe, but in the US farmers use a lot of power. They have welders and other such tools that can draw 50 amps or more. The motors for their drying fans are drawing 20 amps each (and several of them can run at once). Note that the above amp figures are at 240 volts just like power in Europe, not the lower 120 we use for lights and fridges.

The guys who run the British National Grid disagree that the grid needs major changes: http://fes.nationalgrid.com/media/1264/ev-myth-buster-v032.p..., http://fes.nationalgrid.com/media/1253/final-fes-2017-update.... The Norwegians aren't predicting the need for supergrid either: http://publikasjoner.nve.no/rapport/2017/rapport2017_77.pdf (sorry it's in Norwegian and too big for Google and Bing to translate).

No need for a separate grid to deliver high voltage even in rural areas, the overhead or underground wires are between 4KV to 30KV anyway. There is a transformer to step it down to the end use voltage, whatever that is, eg 240 or 400.

You could use train/tram/trolleybus grid for adequate voltages.