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§ Private Profile · P. No: 4, Third Floor, Rajalakshmi Nagar, Velacherry, Chennai 600042, IN
Zinc-air batteries for grid-scale and renewable energy storage.
Sthyr Energy develops and deploys proprietary Zinc-Air battery systems for long-duration energy storage, addressing the intermittency of renewable power sources. Their technology offers a safe, scalable, and recyclable solution, utilizing a closed-loop system where surplus energy regenerates zinc from zinc oxide, and the zinc plates then discharge power using ambient air and water-based electrolytes. This approach provides a high energy density, low-cost alternative, emphasizing the abundance and non-corrosive nature of zinc, and features a modular design with negligible self-discharge for extended energy retention.
The company was co-founded in 2020 by Gunjan Kapadia, Akhil Kongara, and Muhammed Hamdan, who identified the critical need for robust, long-term energy storage to overcome the "Renewable Energy Paradox." Their insight stemmed from the challenges of energy curtailment and reliability issues arising from the mismatch between fluctuating renewable generation and consistent energy demand, aiming to provide a practical solution for continuous power availability.
Sthyr Energy’s solutions cater to diverse applications, including enhancing grid stability, providing critical backup for facilities like data centers, and powering micro-grids in remote locations. The company’s overarching vision is to enable a future powered entirely by renewable energy, offering the backbone for seasonal energy shifting and delivering reliable, round-the-clock clean power to accelerate the transition to a sustainable energy ecosystem.
Sthyr Energy has raised $1.0M across 1 funding round.
Sthyr Energy has raised $1.0M in total across 1 funding round.
Sthyr Energy has raised $1.0M across 1 funding round. Most recently, it raised $1.0M Seed in June 2025.
| Date | Round | Lead Investors | Other Investors | Status |
|---|---|---|---|---|
| Jun 1, 2025 | $1M Seed | Speciale Invest | Rajan Anandan, Antares Ventures | Announced |
Sthyr Energy is a technology company specializing in mechanically rechargeable zinc-air battery systems designed for long-duration and seasonal energy storage. Their modular battery technology serves utility-scale grids, microgrids, and renewable energy projects, addressing the critical need for reliable, safe, and scalable energy storage solutions. By using abundant materials like zinc, air, and water, Sthyr Energy offers a non-flammable, environmentally friendly alternative to lithium-ion batteries, enabling continuous cycling, independent scaling of power and energy, and long-term storage capabilities that can span months. This technology helps integrate renewable energy sources such as solar and wind more effectively by reducing curtailment and replacing fossil fuel peaker plants with zero-emission alternatives, thus supporting the global energy transition[1][2][3].
Founded in August 2024, Sthyr Energy emerged from nearly two years of research and development at IIT Madras, where the team focused on zinc-air battery technology. The founders, leveraging deep expertise in electrochemistry and materials science, pivoted from targeting electric vehicles to addressing the long-duration energy storage market in 2022. The name "Sthyr," derived from the Sanskrit word for "stable," reflects their mission to bring stability to the volatile energy storage market, which is challenged by geopolitical issues affecting rare earth material supply. Early traction includes extensive battery testing (over 2,000 hours continuous operation) and setting up a manufacturing and R&D facility in Chennai, preparing for commercial deployment within a year and a half[2][3].
Sthyr Energy is positioned at the intersection of two major trends: the global push for renewable energy adoption and the urgent need for long-duration energy storage solutions. As solar and wind penetration increases, grid stability and energy availability during low-generation periods become critical challenges. Sthyr’s zinc-air technology addresses these by enabling seasonal energy storage, reducing renewable curtailment, and offering a safer, more sustainable alternative to lithium-ion batteries. The timing is crucial as geopolitical tensions disrupt supply chains for rare earth elements, and regulatory pressures push for decarbonization. By providing a scalable, cost-effective, and environmentally friendly storage solution, Sthyr Energy influences the broader ecosystem by accelerating the transition to 100% renewable energy systems and supporting energy access in remote or off-grid locations[1][2][3].
Looking ahead, Sthyr Energy aims to expand manufacturing capacity in India to 2-3 GWh by 2028-29 and increase battery operational life to 5,000 hours. Their focus on reducing costs and scaling production aligns with growing global demand for reliable, long-duration storage, especially in Europe and India. Trends such as grid decentralization, microgrid proliferation, and increasing renewable penetration will shape their growth trajectory. As they commercialize and deploy pilot projects, Sthyr Energy’s influence is likely to grow, potentially becoming a key player in enabling a 24x7 renewable energy future and reducing global dependence on lithium-based technologies[2][3][4].
Sthyr Energy has raised $1.0M in total across 1 funding round.
Sthyr Energy's investors include Speciale Invest, Rajan Anandan, Antares Ventures.