Non-lithium battery maker CMBlu Energy raises €50 million in Series C, valued at over $1 billion

Germany-based battery company CMBlue Energy has announced a major new capital raise from its venture partners, as it aims to commercialize and scale the production of its SolidFlow battery systems, and take the opportunity with the energy build-out happening across the globe.

This round includes participation from Samsung Ventures, additional new investors, and continued support from all existing strategic partners, including STRABAG.

CMBlu signed an agreement to supply at least 5 GWh of its SolidFlow energy storage technology to Uniper Kraftwerke GmbH, with first deliveries expected from 2027. The company is also pushing its credentials in the US, saying that “SolidFlow avoids foreign-entity-of-concern (FEOC) supply chains for customers in the United States while supporting long-life, infrastructure-grade performance,” angling at

“The financing round is still open, and we remain in contact with further investors,” company head Constantin Eis told business newspaper Handelsblatt. “We’re the largest battery business in the world that doesn’t place its bets on lithium.”

CMBlu’s SolidFlow battery storage systems are based on a combination of organic redox flow technology and solid-state storage materials. They offer high cycle stability, a long service life, non-flammable electrolytes, and do not require critical raw materials such as lithium, cobalt, or nickel. They are designed to deliver ten hours or more of dispatchable energy.

ESS News featured CMBlu after it was named a winner of The smarter E Award 2025 in the Energy Storage category.