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§ Private Profile · Amsterdam, Netherlands
Moonwatt is a technology company.
Moonwatt manufactures sodium-ion battery energy storage systems, offering modular hardware and accompanying software solutions. These advanced systems are designed to enhance the integration and performance of large-scale solar power installations, contributing significantly to overall grid stability. The company’s focus is on delivering robust energy products to address critical challenges within modern energy infrastructure.
The company was founded in 2024 in Amsterdam, Netherlands, by Valentin Rota, Guillaume Mancini, and Zukui Hu. These founders, seasoned engineers with deep backgrounds in renewable power and battery energy storage, established Moonwatt with the insight that innovative energy storage solutions are paramount for accelerating the global energy transition and optimizing existing renewable assets.
Moonwatt’s products primarily serve operators of utility-scale solar facilities and other entities focused on grid optimization and energy resilience. The company's long-term vision is to deliver advanced energy products that solve complex issues within the ongoing energy transition. They aim to advance the adoption of sustainable energy by providing reliable and efficient storage technologies, supporting a more resilient and decarbonized energy future.
Moonwatt has raised $17.4M across 2 funding rounds.
Moonwatt has raised $17.4M in total across 2 funding rounds.
Moonwatt has raised $17.4M in total across 2 funding rounds.
Moonwatt's investors include Daphni, Founders Future, LEA Partners, Motier Ventures, Guillaume Princen.
Moonwatt has raised $17.4M across 2 funding rounds. Most recently, it raised $9.4M Other Equity in March 2025.
| Date | Round | Lead Investors | Other Investors | Status |
|---|---|---|---|---|
| Mar 20, 2025 | $9.4M Venture Round | Daphni, Founders Future, LEA Partners | — | Announced |
| Mar 1, 2025 | $8M Seed | Daphni | Founders Future, Motier Ventures, Guillaume Princen | Announced |
Moonwatt is a Dutch startup founded in 2024 that develops next-generation Energy Storage Systems (ESS) powered by advanced sodium-ion battery technology, specifically designed for co-location with solar plants. The company builds modular, DC-coupled hardware—including string battery enclosures, string hybrid inverters, battery management systems, and site controls—to integrate seamlessly with utility-scale solar, commercial & industrial sites, retrofits, greenfield projects, and microgrids[1][2][3]. It serves solar plant operators and energy customers facing grid congestion, price cannibalization, and intermittency, solving these by enabling 24/7 solar dispatchability, cutting costs, boosting performance, and scaling from kilowatts to gigawatts while replacing fossil fuels with affordable, resilient storage[1][2]. As a young firm, Moonwatt shows early momentum through its proprietary NFPP sodium-ion chemistry and focus on solar hybridization, positioning it to accelerate the renewable grid transition amid rapid solar deployment[1][2][3].
Moonwatt was founded in September 2024 in Amsterdam by a team of seasoned engineers with deep expertise in renewable power and battery energy storage[1][2]. Co-founder and CCO Valentin Rota has publicly articulated the vision: building the first "energy" ESS from a blank sheet by energy professionals for energy customers, avoiding EV sector legacies[3]. The idea emerged from the recognition that solar and wind are scaling faster than any power source in history, but storage is the critical missing link to overcome intermittency and enable fully renewable grids—especially as the power sector drives 40% of global CO₂ emissions[1]. Early traction stems from this conviction, with the team united to engineer proprietary sodium-ion solutions purpose-built for solar, marking a pivotal shift toward sustainable, resource-abundant battery tech[1][2][4].
Moonwatt stands out in the energy storage market through targeted innovations for solar integration:
Moonwatt rides the explosive growth of solar and wind—the fastest-deploying power sources ever—while filling the storage gap essential for renewable grid dominance[1][2]. Timing is ideal: As of 2025, solar faces scalability hurdles like intermittency and congestion, but sodium-ion's cost and abundance advantages align with global decarbonization mandates, especially in a lithium-constrained world[1][3][4]. Market forces favoring Moonwatt include surging hybrid solar-storage demand, EU innovation incentives for clean tech, and the power sector's outsized CO₂ role (40% globally), driving policy and investment toward scalable alternatives[1]. By optimizing solar colocation, Moonwatt influences the ecosystem as a backbone enabler, accelerating fossil fuel displacement and grid stability in Europe and beyond[2][4].
Moonwatt is primed for rapid scaling as solar hybridization becomes standard, with its sodium-ion edge positioning it to capture share in utility-scale projects amid lithium shortages and cost pressures. Key trends like grid modernization, microgrid proliferation, and sodium-ion commercialization will propel growth, potentially expanding to international markets. Its influence could evolve from niche innovator to key player in 24/7 renewables, redefining solar as a baseload resource and amplifying the solar-storage revolution it was founded to ignite[1][2].