[Retric]

The amount of energy stored or is still limited by the rate it can be generated.

The absolute best case for seasonal storage is 1kW * 9 months = 6,480 kWh per 1kW of equipment if you are willing to pay unlimited prices per kWh.

However if you are depending on 0$/kWh which hypothetically occurs 1% of the time you are down to 55kWh per 1kW of equipment. In a world with mass storage wholesale prices will spend less time at 0$ so what matters is the prices when you’re operating not historic prices before you build these facilities.

PS: Conversely, if you’re using that stored energy the grid isn’t going to have a deficit 24/7 the entire winter at your maximum production rate. If you average 8 hours a day for 2 months that’s 480 hours of operation per year. Gas turbines are cheap but not that cheap.