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How does Energy Vault work?

Energy Vault has taken a new approach, building towers with electric motors that lift and lower large blocks, making use of gravity’s force to dispatch electricity when it is needed. The company said that it is entering the first phases of commissioning for its first commercial-scale gravity energy storage system (GESS).

What is Energy Vault's energy storage tower?

Energy Vault has begun commissioning a 25 MW / 100 MWh energy storage tower adjacent to a wind power facility outside of Shanghai. The EVx energy storage tower lifts composite blocks with electric motors. Image: Energy Vault

How many EVX facilities will energy vault build in China?

Following on with the news of Energy Vault’s first GESS facility, the company has announced that six additional EVx facilities will be built in China. The first EVx project announced is a massive 2GWh facility in Inner Mongolia, and five more—ranging in capacity from 100 MWh to 660 MWh—in the provinces of Hebei, Shanxi, Gansu, Jilin, and Xinjiang.

Where is Energy Vault's EVX project located?

The company’s EVx project in China, the first commercial one it has deployed. Image: Business Wire. Energy Vault has started commissioning its first commercial EVx gravity energy storage project in Rudong, China, for Q4 commercial operation.

How efficient is Energy Vault?

The Energy Vault system, called EVx, has demonstrated round-trip efficiency of about 75% in a demonstration project installed in 2020 in Switzerland. The company said it expects that to be improved to about 80%, placing it in a similar range as pumped hydro storage and even grid-scale batteries.

How many GWh does Energy Vault have?

Combined, all the plants have a cumulative storage capacity of 3.26 GWh and represent over $1 billion in capital expenditures. China Tianying’s Chairman, Mr. Yan Shengjun, confirmed that Energy Vault's innovative GESS facilities are meeting with strong demand in China for several reasons.