- If we count hydro as an option we also have to include wind with pumped hydro storage (which comes with the same problems as hydro: geographic requirements and ecosystem disruption).
- Wind/Solar with Li-Io storage is technically a possibility and likely will become cost effective within 20 years.
- Within 20 years better grid-scale storage for use with wind/solar might become widely deployed, like molten salt. Especially if we would be willing to spend equal amounts of capital as would be required for deploying nuclear
- Energy consumption could be much more closely coupled to solar/wind availability by changing electricity prices from a fixed price to a dynamic price coupled to real spot prices. We already shift electricity use into the night by charging industrial consumers less for off-peak use, the same strategy can be used to shift consumption anywhere to any other time of day.