I think they are saying that let's say you install wind turbines. Great, you use them as much as possible during the day when electric demand is high. So, then

I think they are saying that let's say you install wind turbines. Great, you use them as much as possible during the day when electric demand is high. So, then it is night and the supply exceeds the demand due to the fact that this energy can't be stored (or only in a limited fashion). This "wasted" electricity might be a great way to extract value from otherwise wasted electricity. I've said this to friends, I don't know why the power companies wouldn't be mining with electricity that would otherwise be dumped. It is just another channel of demand.