Marunouchi Innovation Partners Co., Ltd. through Marunouchi Climate Tech Growth Fund L.P. (collectively “MIP”), has invested in Mainspring Energy, Inc. (“Mainspring”), the developer of the fuel agnostic, energy efficient linear generator.

Mainspring's linear generator delivers an innovative power solution with high efficiency, fuel flexibility, and low emissions. By directly converting linear motion into electricity, it minimizes mechanical losses and enables near-zero NOx emissions for a cleaner power solution.

With growing electricity demand and limited grid capacity, businesses across Industrial, Utility and Datacenter sectors are seeking power solutions that combine speed to power with reliability, affordability, and even sustainability. Fuel flexibility of Mainspring’s linear generator, including seamless switching to any gaseous fuels (e.g. natural gas, hydrogen, and ammonia), makes it an attractive choice for companies striving to meet their sustainability goals.

Mainspring empowers customers with resilient, cost-effective, and sustainable energy, helping them meet operational and climate goals.

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Shannon Miller, Mainspring founder and CEO：
"It is an honor for Mainspring to join the MIP’s portfolio of leading innovative energy and climate companies. MIP is a recognized global leader in climate investing and brings deep expertise and knowledge to their portfolio companies."

Ichiro Miyoshi, MIP CEO / CIO：
“We are delighted to be partnering with Mainspring alongside other renowned investors. We believe Mainspring’s linear generator technology offers an immediate solution to the growing power demand all over the world and has the potential to provide a clean energy supply. We look forward to collaborating with Mainspring to accelerate the delivery of faster, more sustainable power. ”

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Please click below to find a press release by Mainspring.
https://www.mainspringenergy.com/news/mainspring-secures-258-million-in-financing-to-scale-linear-generator-business/