Too fancy, IMO. The easiest path is demand respond: you just need to control when you put on A/Cs, refrigerators, lighting intensity, industrial manufacturing, etc. By incentivizing responsive demand, the intermittency issue becomes far less important.
In the UK, there is "economy7" pricing, where consumer electricity is cheaper during the night.
In high solar output countries, I could see the opposite happening, that you start seeing tariffs where energy is cheapest around midday when solar output is high.
