We have a similar problem in so-called 'clean green' New Zealand, though not as dire. High prices for energy investors, including domestic power prices that have doubled in real terms over the last thirty years, are sustained that gets most of its power from hydro by doing little as possible to develop further renewables in a thinly populated country otherwise known as the 'Saudi Arabia of wind'. As for rooftop solar, it is practically nonexistent in New Zealand cities, and the largest solar farm in the countryside is still only 2.1 MW, that is two point one, though bigger ones are on the way. You may wish to look up the economic writings of a local scholar named Geoff Bertram on this topic.