New love for US pumped hydro?

The pumped hydro project on El Hierro, Spain, is failing to meet expectations. The US faces a glut of applications for similar projects, which will face challenges of their own. Pic: Animam.photography.

The pumped hydro project on El Hierro, Spain, is not meeting expectations. The US faces a glut of applications for similar projects, which will face challenges of their own. Pic: Animam.photography.

By Jason Deign

Pumped hydro, the forgotten granddaddy of energy storage, seems back in fashion: records show 19 new project applications were filed in the US this year.
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