Perhaps one of the oldest known methods in energy storage systems is the kinetic energy storage method, the Fly Wheel. The continuous rotational power provided by rapidly turning a heavy mass by consuming electricity ensures that it is charged, while providing electricity while being slowed down ensures that it is discharged.

This technology has not been favored lately due to its cost because the carbon or steel structures complex magnetic levitation systems made them very expensive. The French company plans to integrate this technology under the ground in front of the houses. It also avoids active magnetic levitation and expensive materials.

Although it increases its size a bit, especially by using compressed concrete instead of steel, it makes up for its deficit thanks to its cost advantage of up to one-tenth. In addition, the company claims that this material emits less than a quarter of carbon compared to steel.

The developer company is currently making pre-production, it plans to start mass production in 2023 and sell it to companies or energy companies, and to offer it to homes in 1-2 years. The company is considering this technology for electricity storage in solar power plants, in microgrids in remote locations, grid frequency correction and for domestic use.

The biggest advantage of technology is its high charge conversion rate, being able to be charged and reused thousands of times for years without wearing out. The product uses 10 kWh of storage and 10 square meters of space. The 1 meter diameter product weighs 3 tons. While the lowest model can store only 1 hour of energy, the model with a storage capacity of 1 MWh can provide 200 kW of instant energy and provides power for 5 hours. Its weight reaches 300 tons.