[abathur]

There's quite a lot of pricing data available for the energy market and it might be possible to approximate battery profitability by rerunning normal and long-tail history.

See https://www.ercot.com/mktinfo/prices and https://www.ercot.com/gridmktinfo/dashboards and https://www.ercot.com/gridmktinfo/dashboards/energystoragere... for example.