Gravity Storage Inc.

Gravity Storage is a new concept with which unprecedentedly large quantities of power between 1 and 10 GWh can charged and discharged daily. Gravity Storage connects the grid balancing imperative derived from the widespread deployment of renewables with the demand for reliable power supply. The fundamental principle is based on the hydraulic lifting of a large rock mass. Using electrical pumps, as already used today in pumped storage power plants, water is pumped beneath a movable rock piston, thereby lifting the rock mass. During times of insufficient generation of renewable power, the water which is under high pressure from the rock mass, is routed to a turbine, as in conventional hydroelectric plants, and generates electricity using a generator. The rock piston should have a diameter of at least 100 meters in order to be competitive with pumped storage power plants. We calculate with capex between 160 and 380 USD/kWh (corresponding a size of 10 GWh and 1 GWh) and Levelized Costs of Storage between 9 and 18 ¢/kWh. Watch a quick animation how Gravity Storage is operated (30 sec): Vimeo: https://vimeo.com/242084551 YouTube: https://youtu.be/ObvQFX6noDw