CMBlu Energy’s Organic SolidFlow battery picks up an award

CMBlu Energy, a German company developing energy storage systems, was named a winner of The smarter E Award 2025 in the Energy Storage category last week, as jury members recognized the company’s Organic SolidFlow battery technology designed for long-duration energy storage applications.

The Organic SolidFlow battery, due for production in 2026, this long-duration battery system stores 200 kWh of energy and has a 40 kW output power. The jury gave commendation for the Organic SolidFlow Battery’s “impressive energy density, innovative chemistry, and scalable, cost-effective operation.”

The award caps an intriguing run for CMBlu. CMBlu Energy secured €100 million in funding in October 2023. The company has over 250 employees, with scientific staff located in Germany, Greece, and the U.S, with a giga factory located at the company’s new battery production center in Alzenau, in the Rhine-Main region of Germany. Full commercial production of the Organic SolidFlow battery system is planned to commence in 2026.

Battery details

According to CMBlu, the battery architecture at use utilizes principles from both solid-state and flow battery designs. CMBlu states this permits the independent scaling of energy capacity (kWh) and power output (kW) by employing solid organic polymers as the energy storage medium and uses a liquid, organic-based, non-metal electrolyte.

Performance specifications provided by CMBlu include a system lifespan of 10 to 20 years, or alternatively, exceeding 20,000 charge/discharge cycles, with a stated 90% DC-to-DC round-trip efficiency. The company cites safety features such as non-flammability, non-explosiveness, absence of toxic fume emission, and mitigation of thermal runaway risk. The system is designed for operation across a broad temperature range.  

The technology targets the long-duration energy storage market for utility, commercial, and industrial sectors needing to manage intermittent renewable energy generation. A commercial application example is Mercedes-Benz’s plan to install a 20 MWh Organic SolidFlow system at its Rastatt, Germany plant. Installation is scheduled for 2025, with operation expected in 2026.