The solution for the excess supply issue is energy storage, not mining bitcoin. I've worked in clean energy for years, and no energy expert is advocating digital currency mining + increased energy production as a method for meeting demand peaks.
- Actually Bitcoin mining is being adopted by renewable providers as very good solution to offset intermittence and wasted excess.
- Further something like Natural gas flaring is something that cannot be stored but can largely routed through mining setups. Which is being adopted at scale.