The answer: a stink load!

But you need batteries to provide power when the sun isn't shining and the wind isn't blowing. Here is an indication of just how much materials would be required to produce all these batteries:

We won't hold these estimates against the author as there are a number of variables involved. But you get the basic point: there aren't enough materials on the planet to achieve this dream. It's a grand absurd delusion!

We wouldn't worry about natural gas and coal being phased out just yet.