Green Gravity: Pioneering Gravitational Energy Storage for a Sustainable Future
Green Gravity is transforming renewable energy storage by repurposing legacy mine shafts into scalable, cost-effective gravitational energy storage systems. By harnessing the power of gravity to store and release energy, this solution supports grid stability while reducing environmental impact and reliance on chemical-based batteries.
As the electricity grid transitions to large-scale renewable sources like wind and solar, storing energy for when the sun isn’t shining or the wind isn’t blowing is a critical challenge. Traditional storage technologies—such as lithium-ion batteries and pumped hydro—face constraints including high costs, limited resources, and environmental impacts.
Green Gravity’s Gravitational Energy Storage System (GESS) tackles these issues by lifting and lowering heavy weights through disused mine shafts. Energy is stored by raising the weights, then released by lowering them to spin regenerative motors and generate electricity. By reusing existing mining infrastructure, the system offers:
Sustainability: Minimises environmental impact and promotes a circular economy.
Grid Stability: Provides dispatchable power to smooth renewable energy fluctuations.
Cost Efficiency: Avoids the capital costs of building new storage facilities.
Depending on configuration, the GESS can deliver 15–100 MWh of energy, making it adaptable for various grid-scale applications. Its straightforward design, absence of fuel dependency, and reduced use of processed chemicals improve both safety and environmental outcomes.
With millions of legacy mines worldwide, Green Gravity’s technology offers a powerful opportunity to convert these assets into vital components of a clean, resilient energy grid—helping renewable power be available whenever it’s needed most.
