Gravity Energy Storage: Companies, Startups & Research

Energy Vault, Green Gravity, Gravitricity Ltd, RheEnergise and Storelectric are among the companies named in this field. Energy Vault develops systems that store and release electricity by raising and lowering heavy masses, while Green Gravity uses mine shafts. RheEnergise and Gravitricity Ltd also appear among the organizations associated with gravity-storage approaches and applications.

Green Gravity, Storelectric, RheEnergise, Vault.Ltd and Bess Ag are listed as startups, but the available facts do not rank their technical or commercial promise. Green Gravity’s stated approach uses heavy weights in disused mine shafts. RheEnergise is associated with pumped-hydro activity, while the data provides no comparable project detail for every listed startup.

North China Electric Power University, Harbin Institute of Technology and Southeast University are among the named research organizations. North China Electric Power University has 19 documents in the 24-month window and recent work on coordinated operation of solid gravity systems. Harbin Institute of Technology studies control and grid integration, while Southeast University researchers modeled vibration in tower hoisting structures.

The recorded data lists $7,690,698 across 8 grants since 2020 and 10 funding rounds totaling $7,981,988,262. The round total is not a reliable measure of gravity-storage investment: the entries include LG Corp IPOs and other funding records that may not represent financing for gravity-storage development. Treat the grant and round figures as separate data categories.

Nordic Gravity Energy Storage Technology Oy leads the listed patent holders with 6 patents. Hyster Yale Materials Handling Inc. has 3, while LG Corp, GuiZhou Power Grid Co., Xinguo Power, Rhino Systems, AYR AS and Advanced rail energy storage each have 2. These figures identify listed holders; they do not establish the scope or commercial status of each patent.

No: patent activity declined 38.9% in the last 12 months compared with the previous 12 months. There were 87 patents in the 24-month window. Publication activity moved in the opposite direction, with 125 publications in the last year and growth of 2.5%. This points to ongoing research even as the pace of patent filings slowed.

In October 2026, North China Electric Power University researchers published work on coordinated control for solid gravity storage, addressing machine coordination and power fluctuations. A safety comparison of solid gravity pathways appeared in September 2026. Energy Vault and Eskom announced a strategic partnership for gravity-storage projects in May 2026, adding project development to the research focus on operation and safety.

The United States leads the listed country totals with 1,826 documents, followed by the United Kingdom with 819 and China with 627. Switzerland has 584 and Germany has 388. These country figures reflect attributed documents, not installed capacity or commercial deployment, and countries may be represented across multiple types of research and industry activity.

The listed applications include renewable energy integration, data centers, utility grid balancing, industrial energy supply and remote power systems. Renewable integration has 116 documents, data centers 106 and grid balancing 49. These use cases focus on storing surplus electricity and supplying power when generation or demand requires it; their suitability depends on the system design and available site.

The five listed approaches are pumped hydro, tower-based solid mass, underground shaft and mine systems, rail-based systems, and subsea buoyancy systems. They differ in the mass or fluid moved and the infrastructure required. Towers lift solid weights, mine systems use underground shafts, rail designs move masses along slopes, and subsea systems use buoyancy; pumped hydro moves water between elevations.