I am not talking about cheap but about pollution. As more cars go electric it would be better if the car charging is done at peak solar. UK is getting out of europe with brexit but the other remaining countries are connecting their grids with each other so even northern european countries would be using more solar even without having much sunlight

Price is low because there is unused power.

Many powerplants run thought the night because they cannot be turned on and off. The most polluting time to use the grid is during peak demand in the evening, when every powerplant has to be brought online, even the most polluting ones.

Northern Europe relies on Wind, not Solar for renewable energy. Yes, we are integratingg powergrid, but you can't pull 100 GW from Spain to UK. Yhat would require absolutely monstrous infrastructure.

What your assertion for night time charging based on?

In the next decade a few million electric cars will be charging of the world's grid. Currently you need peakers most using Fossil fuels for just the evening period with the few million electric cars charging at night you will be needing those plants to run all night long that's my main point. So promoting day time charging during peak solar is the way to. Car batteries are not good enough yet but in the future these same car batteries could be used for peak demand instead of using peaker plants. But to be able to do this the countries need to start planning for this now instead of a decade from now when the duck curve becomes worse. BTW in my first post I did say unless the base load is nuclear and wind. As far as infrastructure for 100gw solar for UK goes Singapore is planning to buy 10gw of solar power from Australia by undersea cable so the possibilities are there.

I haven't heard of the Singapore project before, that is impressive indeed.

I think the proper way to solve a problem should be smart charging, where the car chooses the cheapest energy through out the day, making much finer decision than a consumer ever could. And grid should be (it usually is) managed in such a way that lowest price corresponds to highest % of clean energy.

We could take this even further: usually the grid responds to demand and predict demand based on past patterns, but we could have a protocol for IoT devices and cars to request power they will need in the future, and ask the grid for the best time to draw power in the next X hour window.