Yes, single wind turbine is negligible, what counts is the wind and PV output over extremely large areas because weather fronts are correlated over hundreds of km. Of course night/day cycle is correlated over whole Europe with few hours shift.

So in 100% renewables Europe scenario, you have build multiples of renewable production in each region.

You build enough renewables in Western Europe to power the whole Europe, you build enough renewables in Central Europe to power the whole Europe and you build enough renewables in Eastern Europe to power the whole Europe and build electric grid to transfer 2/3s of electricity produced in each region into other regions.

Can it be done? Yes, but it will be very expensive.

Many renewable energy modelers often ignore realities and costs of physical electric grid and model whole continent as copper plate which can transfer infinite amount of electricity from each to point to any other point.

For more realistic scenarios German government is looking into power-to-gas energy storage systems, where you convert renewable electricity to hydrogen, ammonia or ethanol and store it underground. There are also plans to import large part of these gases/liquids from other countries, so no energy independence in the future.

https://www.bundeswirtschaftsministerium.de/Redaktion/EN/Pre...

https://www.cleanenergywire.org/news/germany-revise-hydrogen...