What Solution Do Renewable Energy Advocates Offer For The Problem Of Storage?

So I say to these three commenters: it’s time to step up your game. Don’t just make unsupported assertions that wind and solar are cheaper. Give us a spreadsheet with a numerical demonstration of how much storage a fully wind/solar/storage electricity system for the U.S. will need, what technology will be used to provide it, and how much that will cost. Without that, you are just dealing in fantasy.