Sthyr Energy Private Limited raises $1M to pilot India’s zinc-air battery breakthrough for long-duration energy storage

Deeptech startup Sthyr Energy has secured $1 million in seed funding from Speciale Invest, with participation from Antares Ventures.

Sthyr is building mechanically rechargeable zinc-air batteries designed for seasonal and 100+ hour storage, using:

→ Non-flammable, water-based electrolytes

→ No rare earths, only abundant domestic metals

→ A modular, scalable design that separates energy and power

Founded by Gunjan Kapadia, Akhil Kongara and Muhammed Hamdan, Sthyr is building mechanically rechargeable Zinc-Air battery systems for long-duration and seasonal energy storage.

The mission? Enable grid-scale storage that stores solar in summer for use in winter, creating true energy security in a net-zero world.

“Our batteries aren’t just safer and cheaper—they’re geopolitically resilient,” said Gunjan Kapadia, Co-founder & CEO.

With global reliance on lithium-ion and rare earths becoming a bottleneck, Sthyr is taking a bold leap toward local, long-duration energy innovation.

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