First they aren't, which is why Germany and other countries need to provide massive subsidies to producers. Also a source of energy that produces only when wind blows is quite useless, even if it's free. Your source of energy should produce when you have the need for it.

And storage is typically something thay doesn't scale, which is why Germany needs coal or gas to complement renewables. Polluting the rest of Europe while doing so.

Even the term of "renewables" is untrue, given the relatively short lifespan of most windfarms and solar panels. After 25 years you have to trash them, with no real way to recycle it.