Feature: Spain seeks to turn reservoirs into "batteries" for surplus energy storage

BARCELONA, Spain, Aug. 1 (Xinhua) -- Spain's leading energy companies are considering turning reservoirs of water into "super batteries" to store surplus energy produced by renewables.

The Ministry for Ecological Transition said it had received 40 requests to carry out preliminary investigations into the feasibility of reversible hydropower plants that can store and generate electricity. Among the applicants are