Elestor

Elestor, established in the Netherlands in 2014, is a key player in the large-scale, long-duration electricity storage sector. The company was founded by scientist Wiebrand Kout, who aimed to address climate change with a technological solution for energy storage. His scientific background, including pioneering work in PEM fuel cells and electrochemical hydrogen compressors, laid the groundwork for Elestor's core technology. In 2015, Guido Dalessi, a physics graduate with extensive business experience in high-tech industries, joined as CEO and investor, bringing a crucial business focus to complement Kout's scientific vision.

The company is focused on commercializing its hydrogen bromine (HBr) flow battery, a technology designed for grid-scale applications to support the integration of renewable energy sources like wind and solar. Unlike conventional batteries, Elestor's flow battery decouples power (MW) and energy capacity (MWh), allowing for highly modular and cost-effective scaling for long-duration storage (from 8 to 150 hours). The system utilizes hydrogen and bromine, materials that are abundantly available and significantly cheaper than those used in other battery chemistries, driving down the levelized cost of storage. This makes it economically viable for clients such as utility companies and grid operators to store surplus renewable energy and dispatch it during periods of low generation, stabilizing the grid and replacing the need for fossil-fuel power plants.

A distinct feature of Elestor's technology is its ability to integrate with hydrogen infrastructures. During the charging process, the battery generates hydrogen, which can be stored. This allows for synergy with electrolyzers, enabling them to operate more continuously using low-cost stored electricity, thereby reducing the production cost of green hydrogen. The company has secured significant milestones, including a €30 million Series A funding round in 2022, led by Equinor Ventures and co-led by Invest-NL, with participation from Royal Vopak and others. This capital is being used to accelerate commercialization and scale up to a gigawatt-scale production facility. Elestor has already signed a commercial contract with Royal Vopak to build its first commercial-scale system.

Keywords: flow battery, long-duration energy storage, grid-scale storage, hydrogen bromine, renewable energy integration, green hydrogen, electricity storage, energy transition, stationary storage, electrolyzer integration