RheEnergise
Updated: February 03, 2026
Stephen Crosher - CEO
Country: UK | Funding: £14M (+)
Founded: 2019
Website: https://www.rheenergise.com/
ReEnergise developed High-Density Hydro technology to create pumped hydro energy storage systems that can be located in low-lying, hilly terrain, eliminating the need for high, steep slopes. The HD Hydro system uses a dense, mineral-rich liquid instead of water to reduce the system's size while delivering the same performance as a much larger system using regular water. The liquid recirculates through a pipeline between the upper and lower reservoirs. The compact size of the HD Hydro system allows for burying one or both reservoirs underground, preserving the land above for other uses. With an eight-hour operating cycle, this high-density hydropower system is half the cost of a lithium-ion battery system, without the risk of fire or environmental concerns. The company has already implemented a pilot project at Cornwood, a kaolin mine in the UK.
Founded: 2019
Website: https://www.rheenergise.com/
ReEnergise developed High-Density Hydro technology to create pumped hydro energy storage systems that can be located in low-lying, hilly terrain, eliminating the need for high, steep slopes. The HD Hydro system uses a dense, mineral-rich liquid instead of water to reduce the system's size while delivering the same performance as a much larger system using regular water. The liquid recirculates through a pipeline between the upper and lower reservoirs. The compact size of the HD Hydro system allows for burying one or both reservoirs underground, preserving the land above for other uses. With an eight-hour operating cycle, this high-density hydropower system is half the cost of a lithium-ion battery system, without the risk of fire or environmental concerns. The company has already implemented a pilot project at Cornwood, a kaolin mine in the UK.
