[Sonthun]

In addition to the comments above about solar/wind inconsistency, it is also a lot cheaper to run baseload power plants constantly rather than to ramp peaker plants up and down. So, if they can store the baseload power and then tap it later the total cost of electricity will come down. Plus, storage makes it easier to level the grid to make output match demand.

[nordify]

Is storing power cheaper than using peaker plants? That is, is storing power at scales required to replace peaker plants economically viable?