[mk81]

Show me a working grid scale electrical energy storage system that enables us to spin down fossil generation.

Because I will invest all my money into it.

But it doesn't exist yet.

[eloff]

Um, pumped hydro? Teslas battery facility in Australia?

It certainly can be done. The economics aren't there against natural gas, without subsidies or carbon taxes.

[mk81]

People are working on it; no doubt. But look up the total capacity of these systems and compare to the size of the grid and you'll see that were at the beginning of a very long road.