Energy Storage on a Renewable Base Energy System

Energy storage on a renewa base energy system, there are really two different sorts of challengers. How do we actually use storage to put aside the energy when people aren't using very much, and then release it at the times of day, or the times of week, when people are using it a lot? Now all the the three solutions that i mentioned earlier come to play in that part. Hydrogen can be produced from excess renewable energy during the summer through electrolizes that hydrogen can be stored in big quantities in large tanks, until the winter. And then it can be used in gas turbines in the same way that methane and fossil gas is used now for long periods of time.