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25th of March 8:00 am CET

 Moonwatt secures €8M
March 5, 2025·2 min read

Joy Laoun

News Editor, Vestbee

Amsterdam-based Moonwatt secures €8M to advance Sodium-Ion batteries for sustainable 24/7 energy

Amsterdam-based Moonwatt is developing sodium-ion battery technology to provide cost-effective, sustainable, and dispatchable energy storage solutions. The company has secured €8 million in a seed funding, co-led by Daphni and LEA Partners, with additional support from Founders Future and AFI Ventures.

  • Founded in 2024 by Zukui Hu, Guillaume Mancini, and Valentin Rota, Moonwatt develops energy storage solutions using sodium-ion battery technology to make solar power cost-competitive and available around the clock.
  • Moonwatt's sodium-ion batteries offer a more sustainable, cost-effective alternative to lithium-ion batteries, using abundant sodium and reducing environmental impact. They help address the intermittency of renewable energy.
  • The company’s hardware and software solutions are designed for co-location with solar power plants, allowing them to replace fossil-fuel power generation. 

"Our goal? To supercharge the solar revolution by making it the dominant dispatchable electricity source worldwide. Available anytime, anywhere, at a fraction of its current cost, and using abundant raw materials," Moonwatt's team, commented on LinkedIn.

Details of the deal

  • The round was co-led by Daphni, a Paris-based venture capital firm that invests in user-oriented startups with European roots and global ambitions, and LEA Partners, a German VC firm. Additional support came from Paris-based VC Founders Future and AFI Ventures.
  • Moonwatt will use the fresh €8 million in seed funding to accelerate the development of its sodium-ion battery energy storage system, with plans to deploy a pilot installation in Europe next year.
  • The funds will also support the startup’s efforts to scale its technology and prepare for its first commercial deployments in 2027.

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