China has unveiled a groundbreaking gravity battery system in Rudong. Developed by Energy Vault in partnership with the Chinese government, this technology uses heavy solid blocks and gravity to store renewable energy. It promises a cleaner and more durable alternative to traditional lithium-ion storage methods, creating a new path forward.
“Gravity batteries now decisively challenge lithium-ion dominance in renewable storage.”
The pilot project started in 2024 and is still being tested. Engineers use mechanical lifts that work at a round-trip efficiency of over 80% to convert potential energy. This system responds automatically to changes in grid demands, ensuring a reliable power supply during busy times.
With the rise in renewable energy use and electricity needs, there’s a push to find new solutions besides lithium-ion. Gravity batteries help avoid shortages of critical materials and environmental damage, offering a sustainable and long-lasting answer for growing energy needs.
Lithium-ion batteries have about 74 GW capacity, last 10-15 years, and need rare materials. In comparison, gravity batteries last over 35 years, use plenty of common materials, and maintain an 80% efficiency.
China’s innovative gravity battery project could change the way renewable energy is stored around the world, offering sustainable storage and greatly reducing the need for rare resources.
