- The ‘Sleeping Giant Of Energy Storage’ Is Waking Up. “Pumped storage is getting a second look." Systems are now being designed as closed-loop systems, far from rivers. “Pumped storage provides large quantities of long-duration storage measured in days or weeks." https://www.forbes.com/sites/jeffmcmahon/2022/12/29/the-sleeping-giant-of-energy-storage-is-waking-up/amp/ 90 comments energy