How Much Energy Do You Need for Gravity Storage?

The energy vault building concept would be too tall to store large amounts of energy, says John Defterios. He argues that the structure could not hold enough water for a gigawatt hour's worth of power if it was built at full height. The design also needs reinforced concrete and steel as well as cement which is an embodied carbon source according to defterios. "It seems like a no brainer to me," he adds.