> People who buy electric cars are far more likely to buy solar panels. And storage batteries. And wiring they would need for the electric car. It's all directly related.

Is this true? I'd be interested in learning more about the data behind this.

Anyway, for the sake of discussion let's say it is. Does that mean there is a correlation that scales to the whole population?

Or is it just that electric cars and solar panels appeal to the same small segment of the population? That would show a strong correlation, but not scale well.