“Storage is widely acknowledged today as an expensive option, but its costs are falling and its value is improving,” said a new report by the European Academies of Science Advisory Council (EASAC), published on Monday (19 June).
The report takes stock of the latest scientific evidence on the use of storage in electricity grids and highlights what policymakers can do to boost grid-connected storage in the future.
But despite growing interest and billions of investment, no new storage technologies are expected to be commercially deployed on a large scale before 2030, said the report, which represents the consensus among the national science academies of the 28 EU member states, plus Norway and Switzerland.
For decades, hydro power plants built on mountain dams and lakes have acted like super-sized batteries, allowing a convenient form of storing electricity on a large scale. But scientists have until now failed to crack the nut of storing large amounts of power on the electricity grid.