Green Gravity
Green Gravity is an Australian gravitational energy storage company developing systems that raise and lower heavy weights in decommissioned mine shafts to store renewable energy. It serves utilities, grid operators, and mining companies, with pilot deployments underway in NSW and Queensland.
- Company typePrivate
- Founded2020
- HeadquartersWollongong, Australia
- Headcount11–50
- GTM typeB2B
- OfferingServices
What Green Gravity does
Green Gravity Energy Pty. Ltd. is an Australian gravitational energy storage company founded in 2020 and headquartered in Wollongong, New South Wales. The company develops technology that raises and lowers heavy weights (up to 40 metric tonnes) vertically within decommissioned mine shafts to capture and release gravitational potential energy, storing up to 10 kWh per 100 metres of shaft depth. The system is built from proven mechanical components sourced from the mining, steel, and energy sectors (cables, weighted blocks, mine winders, electric motors), avoiding the chemicals, fire risk, and capacity degradation associated with lithium-ion batteries. The firm operates The Gravity Lab, an R&D facility established with BlueScope Steel at Port Kembla Steelworks, where it can test sequences of 16 weighted objects for power generation, efficiency, and grid-connection dynamics.
The company's commercial model combines two revenue streams: energy storage as a service (developing, installing, and operating gravitational storage systems for utilities and grid operators) and technology licensing/engineering services for mine operators repurposing decommissioned shafts. Its primary go-to-market is enterprise field sales targeting utilities, grid operators, and mining companies, supplemented by strategic channel partnerships (Wollongong Resources, Glencore) that provide site access to scarce mine shaft assets, plus government partnerships (NSW Government Climate Change Fund, Wollongong City Council, City of Mount Isa) for funding and regional deployment support.
Green Gravity has 11-50 employees and closed a AU$9 million Series A in October 2024 led by BlueScopeX with HMC Capital, M2P Engineering, Pacific Channel, and Sumitomo Corporation participating. As of late 2025 the company had executed a binding trial agreement at the Russell Vale mine (Wollongong Resources), an MoU for up to 2 GWh of deployment at Mount Isa (Glencore), and an international expansion MoU with IIT (ISM) Dhanbad's TEXMiN research park in India. The company remains pre-revenue, with pilot deployment as its next operational milestone.
Green Gravity firmographics
Firmographics- Name
- Green Gravity
- Legal name
- Green Gravity Energy Pty. Ltd.
- Website
- https://greengravity.com
- Company type
- Private
- Founded year
- 2020
- Operating status
- Operating
- Headcount range
- 11–50 employees
- Short description
- Green Gravity is an Australian gravitational energy storage company developing systems that raise and lower heavy weights in decommissioned mine shafts to store renewable energy. It serves utilities, grid operators, and mining companies, with pilot deployments underway in NSW and Queensland.
- Ownership category
- akta.pro rank
Green Gravity industry classification
Industry- Product category
- Energy Storage Systems
- NAICS
- Agriculture, Construction, and Mining Machinery Manufacturing (3331)
- SIC
- Construction, Mining & Materials Handling Machinery & Equip (3530), Motors & Generators (3621)
- akta.pro primary industry
- Gravity & Solid-Mass LDES (Lifted Weight, Rail, Mine-Shaft) (EUAFADAD)
- akta.pro secondary industry
- Mechanical LDES (Pumped Hydro, Compressed/Liquid Air, Flywheels) (EUAFADAB)
Keywords
Where Green Gravity is headquartered
LocationHeadquarters
- HQ city
- Wollongong
- HQ country
- Australia
- HQ region
- Oceania
Offices4 records
Markets served
Green Gravity business model
Business model- GTM type
- B2B
- Offering type
- Services
- Cost components
- Technology or R&D, Personnel, Operations, Infrastructure, Marketing or Sales
Revenue model
- Energy Storage as a Service: Green Gravity appears to develop, install and operate gravitational energy storage systems. The company installs and operates cutting edge gravitational energy storage systems in mine shafts, likely providing energy storage as a service to utilities and grid operators.
- Technology licensing and engineering services: The company licenses its gravitational energy storage technology and provides engineering services for mine operators looking to repurpose decommissioned shafts.
Go-to-market motion3 records
Distribution channels2 records
Marketing channels9 records
Green Gravity product offering
Product offeringCore offering
Green Gravity develops and operates gravitational energy storage systems that raise and lower heavy weights (up to 40 metric tonnes) vertically inside disused or active mine shafts to capture and release gravitational potential energy. The technology uses proven mechanical components (cables, weighted blocks, mine winders, electric motors) rather than chemicals, storing up to 10 kWh per 100 metres of shaft depth with equipment life 3 to 4 times longer than chemical batteries. The company delivers this through an Energy Storage as a Service model and technology licensing, targeting utilities, grid operators, and mining companies for long-duration storage and grid ancillary services.
Product overview
Green Gravity offers a single core product: its Gravitational Energy Storage System, which uses disused mine shafts to store energy by raising and lowering heavy weights. The system is complemented by The Gravity Lab research facility at Port Kembla Steelworks for R&D testing and validation. The technology provides applications across all electricity system levels including power generation (energy arbitrage, peak shaving), transmission (ancillary services, inertia), distribution (reactive power, local security), and end users (mine decarbonisation, DER firming).
Differentiator
Problem solved
Functional benefit
Products and services
- Gravitational Energy Storage System Gravitational energy storage system that raises and lowers heavy weights (up to 40 metric tonnes) vertically inside disused or active mine shafts to capture and release gravitational potential energy, storing up to 10 kWh per 100 metres of shaft depth using proven mechanical components. Sold to utilities, grid operators, and mining companies for long-duration storage, energy arbitrage, peak shaving, ancillary services, inertia services, voltage support, reactive power, distribution loss management, and mine decarbonisation.
- Energy Storage as a Service Managed service in which Green Gravity installs and operates its gravitational energy storage systems inside mine shafts on behalf of utilities, grid operators, and mining customers, delivering stored renewable energy and grid ancillary services without the customer owning the underlying assets.
- Technology Licensing and Engineering Services One-time licensing of Green Gravity's gravitational storage technology combined with engineering services for mine operators and partners seeking to repurpose decommissioned shafts for utility-scale energy storage deployments.
Quantifiable outcome
- Equipment life 3 to 4 times longer than chemical batteries, matching the life of power generating assets
- +3 more outcomes
Companies that use Green Gravity
Customer profileNamed customers1 record
Segments4 records
Ideal customer profiles2 records
Green Gravity technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature4 records
Green Gravity partnerships and signals
Strategic signalPartnerships
Nine partnerships are on record, tiered core and flagship.
- TEXMiN (Technology Translation Research Park, IIT ISM Dhanbad)coreMOU signed to explore potential of deploying gravitational energy storage systems in India's vast network of underground mines.
- Wollongong ResourcesflagshipBinding agreement executed to deploy gravitational energy storage trials at the Russell Vale mine in New South Wales. This is the world's first demo deployment of the technology in an underground mine.
- Wollongong City CouncilcoreMOU to establish strategic collaboration to advance renewable energy storage and decarbonisation outcomes across the Illawarra region.
- TAFE NSWcoreJoint force with University of Wollongong to launch the Illawarra Energy Futures Skills Unit for regional collaboration and workforce development.
- University of WollongongcoreJoint force with TAFE NSW to launch the Illawarra Energy Futures Skills Unit for regional collaboration and workforce development. Also partnered for Innovation Expo at Parliament House.
- BlueScope SteelflagshipPartnership to create The Gravity Lab at Port Kembla Steelworks, a specialised research facility for R&D on gravitational energy storage. Hosts ministers and government officials for demonstrations.
- GlencorecoreConcept engineering study work supported at Mount Isa Mines assessing potential to sustainably repurpose multiple mineshafts within the Mount Isa Copper Operations as they cease to be required for mining operations.
- City of Mount IsacoreLandmark MOU for regional studies, minesite concept engineering, and local community engagement for deployment of up to 2 GWh of gravitational energy storage in North West Queensland.
- xAmplifycoreStrategic partnership designed to leverage world leading artificial intelligence capabilities for AI-enabled operations of the gravitational energy storage systems.
Scale indicators7 records
Recent moves6 records
Expansion highlights6 records
Green Gravity competitors and assessment
Company assessmentEmerging players
- Quidnet Energy: US-based developer of compressed air energy storage using subsurface geological formations. Targets the same long-duration utility storage market with a different mechanical LDES approach.
- Antora Energy: US-based startup converting surplus renewable electricity into thermal energy stored in carbon blocks for industrial heat and power. Competes for clean firm power contracts with industrial and utility customers.
- Malta Inc. US-based startup (spin-out from X) developing pumped heat thermal storage for long-duration grid applications. Competes with Green Gravity in the long-duration utility storage category.
Direct peers
- Gravitricity: Edinburgh-based developer of gravity energy storage using weights in disused mine shafts. The most directly comparable peer, pursuing the same mine-shaft LDES architecture that Green Gravity is commercialising.
- Energy Vault: NYSE-listed company (NRGV) developing gravity-based energy storage using composite weights lifted in purpose-built towers rather than mine shafts. Closest publicly listed competitor in the gravitational LDES category.
- Advanced Rail Energy Storage: California-based company developing gravity-based energy storage by raising heavy masses up hillsides using rail systems. Comparable in core physics (gravitational potential energy) but uses rail instead of mine shafts.
Broad incumbents
- Form Energy: US-based developer of iron-air battery systems targeting 100+ hour long-duration storage. Competes with Green Gravity for utility-scale LDES contracts in the renewable integration market.
- Highview Power: UK-based developer of liquid air energy storage (LAES) plants for long-duration grid storage. Competes in the same utility-scale LDES market with a different mechanical/thermal architecture.
- ESS Inc. NYSE-listed (GWH) developer of iron flow battery technology for long-duration stationary storage. Competes with Green Gravity for utility-offtakers seeking multi-hour to multi-day storage solutions.
Others
- BHP: Global mining major whose former executives founded and lead Green Gravity. Potential strategic partner and customer, with extensive global mine shaft assets that could host future gravitational storage projects.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat5 records
Key risks5 records
Key highlights6 records
Customer concentration
Green Gravity social profiles
Digital presenceGreen Gravity financial estimates
Financial estimateRevenue estimate
Valuation estimate
Green Gravity leadership team
Management profileNumber of profiles
Profiles6 records
Green Gravity funding detail
Funding detailFunding overview
Funding rounds2 records
Investors6 records
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Green Gravity M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Green Gravity
What does Green Gravity do?
Green Gravity develops and operates gravitational energy storage systems that raise and lower heavy weights (up to 40 metric tonnes) vertically inside disused or active mine shafts to capture and release gravitational potential energy. The technology uses proven mechanical components (cables, weighted blocks, mine winders, electric motors) rather than chemicals, storing up to 10 kWh per 100 metres of shaft depth with equipment life 3 to 4 times longer than chemical batteries. The company delivers this through an Energy Storage as a Service model and technology licensing, targeting utilities, grid operators, and mining companies for long-duration storage and grid ancillary services.
Is Green Gravity a public or private company?
Green Gravity is a private company. It is classified as venture growth investor backed and is currently operating.
When was Green Gravity founded?
Green Gravity was founded in 2020. It employs 11 to 50 people.
Where is Green Gravity based?
Green Gravity is headquartered in Wollongong, Australia, in the Oceania region.
How does Green Gravity make money?
Two revenue lines are on record. Energy Storage as a Service is the primary driver. The others are technology licensing and engineering services.
Who are Green Gravity's main competitors?
Emerging players on record are Quidnet Energy, Antora Energy and Malta Inc.. Direct peers are Gravitricity, Energy Vault and Advanced Rail Energy Storage. Broad incumbents are Form Energy, Highview Power and ESS Inc.. BHP is listed as an others.
Does Green Gravity have an API?
No public API is recorded for Green Gravity.
What industry is Green Gravity in?
Green Gravity's product category is Energy Storage Systems. Its primary akta.pro industry code is EUAFADAD, Gravity & Solid-Mass LDES (Lifted Weight, Rail, Mine-Shaft), with a secondary code of EUAFADAB, Mechanical LDES (Pumped Hydro, Compressed/Liquid Air, Flywheels). Its NAICS code is 3331 and its SIC code is 3530.