For large scale energy storage, pumped hydro is much cheaper and has a much larger capacity, but they take years to build and are harder to get approved due to environmental concerns.

For example, the planned Snowy 2.0 pumped hydro scheme in Australia: 2 GW, 350 GWh, US$2.8-3.3 billion. Will take 5 years to build.

Compared to Tesla's previous 'world biggest battery' in South Australia (the 'Hornsdale Power Reserve'): 100 MW, 129 MWh, US$74 million. Built in 4 months.

i.e. $9.43 versus $574 per kWh.