Comment Re:Simple Solution (Score 1) 324
This is the solution. Anyone who wants to see it in practice should look into what the island of El Hierro is doing. They have this system in place, and it works great.
Remote islands feel the pressure to find a storage solution more than anywhere else, not because of any green-energy incentives, but because importing fuel for diesel-fired generators is very expensive. These islands often have an abundance of wind and sun, so renewable power generation isn't a huge problem, but storage is. So, they pump water uphill when there's excess power, then they let it run down into hydro-electric generators when the wind stops blowing. Wind, water, and gravity. Simple but elegant.
There's a series on Netflix that explores islands like El Hierro, called Islands of the Future. It provides a great overview of how these systems work, in real-world applications.