Moonwatt funding news – Amsterdam-based Moonwatt Secures €8 Million in Funding

The funding round was led by daphni and LEA Partners, with support from Founders Future, AFI Ventures (by Ventech), Kima Ventures, and other business angels and customers.

The money will help Moonwatt speed up the development of its technology, grow its team, and support the transition to a cleaner, more sustainable energy system.

Zukui Hu, CEO and Co-founder of Moonwatt, said: “We started our product design from a blank sheet of paper, freeing ourselves from legacy features inherited from other segments of the battery industry, with the goal of designing a system from scratch that is fundamentally cheaper, safer and more reliable. Our vision is a product that can be deployed anywhere, and that can be scaled up multiple orders of magnitude without facing raw materials scarcity.”

Moonwatt explains that solar power has grown faster than any other energy source, and its capacity is expected to increase ten times by 2030. However, while solar power is affordable and abundant, it can't be used all day, every day. During the day, when demand is low, solar power fills the grid, but at night, when the sun sets, there isn't enough infrastructure to keep the power flowing.

This inconsistency leads to grid congestion and falling prices. Right now, over 3,000 GW of renewable projects are delayed because of grid issues, and prices can drop so low that power plants have to shut down or sell power at a loss.

Paul Bazin, Partner at daphni, said: “Renewable power growth has exceeded all expectations, but we’re approaching a tipping point where it won’t be able to scale further without better energy storage. Created by industry veterans, Moonwatt is solving this with a differentiated storage product built specifically for solar – this is the breakthrough the industry has been missing.”

Moritz Pagel, Investor at LEA Partners, said: “By focusing on sodium-ion, Moonwatt represents a paradigm shift, finally making 24/7 renewable power truly competitive and unlocking massive value for operators and consumers. We’ve been amazed by the complementary skillset and execution power of the team and are excited to back Moonwatt.”

Instead of using old technology or a one-size-fits-all solution, Moonwatt has designed its battery storage system specifically for solar energy. It is built to handle solar power's unique challenges, like its inconsistent availability, price fluctuations, and congestion issues, and it can work anywhere in the world from day one.

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Moonwatt uses sodium-ion batteries instead of lithium-ion, which are 1,000 times more abundant, one-third cheaper, and safer. Sodium-ion batteries are also better for creating storage solutions that are scalable, sustainable, and cost-effective.

When used with solar plants, Moonwatt's systems will help increase the efficiency of solar power from 15-20% to up to 80%. This will reduce the need for expensive grid upgrades, reduce congestion, stabilize prices, and make it possible to have clean energy available all day long.

Moonwatt’s goal is to build an optimized solar system that can unlock solar energy’s full potential and make it the leading source of power worldwide. If successful, this approach could help reduce up to 14 GtCO2 per year by 2050.

Marc Menasé, Founding Partner at Founders Future, said: “At the heart of every game-changing innovation is an exceptional team. Moonwatt combines world-class expertise with relentless execution to tackle one of the biggest challenges in renewable energy: scalable and cost-efficient storage. Their visionary approach and breakthrough technology have the potential to transform how we store and distribute clean energy, and we’re proud to support them on this journey.”

About Moonwatt

Moonwatt was founded in 2024 by CEO Zukui Hu, CTO Guillaume Mancini, and CCO Valentin Rota. They started the company with the belief that clean energy can only succeed if the systems that power it are scalable, sustainable, and affordable. With this in mind, Moonwatt is creating the world’s first energy storage solution designed specifically for solar power.