> Pumped hydro, batteries, and hydrogen are the ones I immediately know.

There are some nice heat storage ideas as well as some gas pressurisation/liquification ones that have real potential. Plus odd ball things like flywheels. We can probably come up with better ones. Pumped hydro needs geology we are lacking for anything big. Batteries tend to be expensive due to materials but we may have some options here.

Energy storage is what we really need. Once we get that then most arguments against renewables are dead.

We also need to invest in energy movement (the grid) because this is not up to task. We have to close down energy generation regularly due to this. Also it should be simple for small providers (including individuals) to be able to feed power into the grid.