I still hope Ares [1] will turn out to be competitive. The idea is sound and can be build in most areas in the world. You could potentially reach storage volume

I still hope Ares [1] will turn out to be competitive. The idea is sound and can be build in most areas in the world. You could potentially reach storage volumes within short time frames that only pump storage can rival. Alternatively, there was a German experiment to use underwater concrete pump storage to provide storage close to production for offshore windfarms. Not sure where the project is at, but these ideas could well supplement batteries. [1] http://www.aresnorthamerica.com/ http://www.aresnorthamerica.com/