Storage with solar is currently generally economical competitive for about 75% of output for 4hrs, with a charge cycle per day. In order to replace fossil fuel

Storage with solar is currently generally economical competitive for about 75% of output for 4hrs, with a charge cycle per day. In order to replace fossil fuels using wind and storage you would need significant more than 4 hours, using a much slower charge cycle. If we want to have something like 1 week of storage, with an expected charge cycle of 2 weeks (ie one week where the wind is producing more than the grid, followed by one week where it is producing less), we are talking about 42x in capacity, and the investment will get repaid 14x slower for each dollar invested. Prices will need to drop and production will need to be heavily increased before batteries is viable for wind, and until then more fossil fueled power plants is being built in order to match the capacity of wind. If I had to choose between battery and nuclear, my choice is neither. Simply ban fossil fuels while we wait for people to make up their mind.