[KptMarchewa]

>CAES plant capable of storing several days of energy at the same capacity, and the same capacity in a combined cycle gas plant, and a redox flow battery with 12 hours of storage, and a hydrogen electrolyser capable of producing enough hydrogen or methane to run the gas plant with change left over

None of this have ever happened beyond "research" projects at extremely small scale. You can't take nuclear "actually cost after construction" - which in some countries like Korea or China is maybe 20% more than original estimations - and apply assumption that anything of this is actually able to scale, not even talking about cost of this.