wet dream battery

This is a battery.  A pumped storage plant in Germany.  Any time the grid has an excess of energy the pump kicks on and drives water into a small lake above the river,  any time the grid wants more energy a gate opens and water falls back down through pipes loaded with turbines.  The system is very dynamic, it can switch on or off in a couple minutes, sending water up or down as needed.  This system is providing Germany on-demand low price electricity.  It scavenges energy that would have been lost, for later use at a very low price.

Ireland has just identified 13 sites and are building copies of this system adjacent to wind mills to store power for low wind days.  Germany also has another 13 sites identified for this.  One of the Atlantic Islands, Canary perhaps installed more windmills than needs so they could bank water atop a mountain for days the wind won't blow.

As a German official said about the many alternative green energy projects in Germany, "we can do what the US cannot because we don't have the Koch brothers".