OK, so if Pumped Storage is 70%-85% Efficient, what is Wind to Electricity, to the Best Battery to Generator efficiency? and how long would the Storage life compare?
Wind to Electricity... efficiency
is naturally quite low and not important. We really don't want to take 100% of the wind energy and stop all wind. We actually do not want to have a measurable impact.
What would be a meaningful comparison to pumped storage, which is electricity in; stored over time; electricity out to the same input output with a battery in the middle.
If that is what you want, I can search it out, but it it will not be close to pumped storage for efficiency.