Here is where you're wrong: you're thinking in terms of 4 to 1 power to storage. A CO2 battery can have a very large storage for 1MW. It could potentially have

Here is where you're wrong: you're thinking in terms of 4 to 1 power to storage. A CO2 battery can have a very large storage for 1MW. It could potentially have a storage of 40 hours. You keep charging it for months, and then release it all when there is a week long lull of wind and solar production. Such short bursts of energy are typical for Li-Ion batteries, but quite atypical for other forms of energy. It's the same principle as with the flow batteries.