Source: Yale Climate Connections
Energy Vault and similar companies are converting the gravitational potential of tall buildings into a storage mechanism—stacking and lowering heavy blocks to absorb and release power during peak demand cycles. This approach sidesteps the chemistry and materials constraints of lithium batteries while repurposing existing infrastructure, though it only works economically in dense urban centers with sufficient height differential and predictable load patterns. The constraint is adoption: developers and building owners must sacrifice floor space and structural integrity for grid services that already have cheaper alternatives in most markets.