The more we try to engineer the economics of this...
...the harder it will be to make rational economic decisions, which I think is the agenda.
Until there is an efficient way to store wind and solar energy, we will have to maintain dual redundant sources, which is what the most of your power bill is in the first place.
Yeah, the Danes bet get to feel good about their carbon footprint, but they certainly don't feel the same about their power bills. This is in spite of the fact that most of their energy (and a fair amount of their wealth) is a result of North Sea oil & gas extraction.