On Tuesday, April 7, 2026, Feston SEV Pvt. Ltd., a rising force in solar inverters and power electronics under the FestGroup, announced its entry into the Battery Energy Storage Systems (BESS) market.
This strategic move marks Feston’s evolution from a hardware component supplier to an integrated energy management solutions provider, addressing the critical need for grid stability and dispatchable solar power in India.
The 3 GWh Manufacturing Roadmap
Feston has committed to a significant manufacturing presence in Chennai, Tamil Nadu, to support its energy storage ambitions.
- Annual Capacity: 3 GWh (Gigawatt hours) of battery assembly.
- Product Range: A highly versatile portfolio designed for the entire energy spectrum:
- Residential: Starting from compact 5 kWh systems for home backup.
- C&I (Commercial & Industrial): Scalable units for factories and data centers.
- Utility-Scale: Massive 5 MWh containerized solutions for grid-level storage.
- Strategic MoU: The company has partnered with Light Mechanics Private Limited (based in Bengaluru) to commission a state-of-the-art prismatic battery pack assembly line, ensuring high-precision automated manufacturing.
Strategic Rationale: The Shift to “Energy Management”
The move is timed with a structural shift in the Indian solar market. As “time-of-day” (ToD) tariffs become more common, the value of solar power is no longer just in its generation, but in its timing.
- Intermittency Mitigation: BESS allows users to store surplus midday solar energy and discharge it during high-tariff evening peaks.
- Inverter Evolution: Feston’s core expertise in inverters is being leveraged to turn these devices into intelligent “control centers” that manage bidirectional power flows between the panels, the battery, and the grid.
- Reliability: For C&I customers, the integrated BESS provides a “sovereign” power supply, reducing dependence on a volatile grid and fossil-fuel-based DG (diesel generator) sets.
Market Context: Chennai’s Growing “Battery Hub”
By situating its 3 GWh facility in Chennai, Feston joins a growing cluster of electronics and EV component manufacturers in Tamil Nadu. The state’s established logistics and export infrastructure also position Feston for future international growth.
“The requirement today is moving beyond generation to how energy is managed across time. Storage is becoming central to improving reliability and aligning energy usage with demand.” — Sampath Kumar, CEO, Fest Group.
