Startup Raises $100 Million to Store Energy in Giant Hanging Bricks

This company uses gravity and bricks to make giant batteries.
Another Brick in the Wall

A bold startup secured significant funding to fund its ambitious plan for energy storage. It uses giant hanging bricks to collect excess energy and then drops them when it is needed.

According to PV Magazine, Energy Vault, a California-based and based in Switzerland, has received $100 million in series-C funding. The money will be used to deploy the company's brick-dropping platform in the US, Middle East and Europe as well as Australia.

Brick Battery

It's quite clever how the platform works: 35-metric-ton bricks are lifted up to a 35-story tall tower. The bricks can be lifted up the tower with excess energy if energy requirements are low. If energy requirements are high the bricks are thrown to the ground. The kinetic energy from the generator is used to create a power grid.

This idea is simple, and when combined with a renewable energy source like solar, wind or hydro, it can be a great way to store excess energy for use in times when energy needs are high, such as mornings and nights.

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Will it catch on?

The company's new EVx platform was released in April 2021. It boasts a modular design that can store energy for shorter power durations (two to 4 hours) or longer durations (5 to 24 hours).

Energy Vault has a $100 million cash windfall and hopes to make the EVx platform more widely accessible.

It's easy to see something like the brick-dropping platform more as a joke than anything else. It is true that it could be a very innovative way to store energy if it works as expected.

Update: This story was edited to clarify that Energy Vaults stores energy but does not create it.

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READ MORE: Gravity-based storage tower for renewable energy at grid scale [PV Magazine]

Brick batteries: Large hanging bricks could store energy better than batteries

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