India’s solar farms produce their brightest power at midday, and its wind turbines spin hardest when the weather says so — not necessarily when factories, hospitals and homes need electricity most. Closing that gap between when clean power is made and when it is used is one of the great engineering jobs of India’s energy transition, and it comes down to a deceptively simple idea: a really big, really smart battery, built to sit beside a solar plant or a factory and hold a whole evening’s worth of power in reserve.
At The Battery Show India 2026, held from October 22 to 24 at the India Expo Mart & Centre in Greater Noida, New Delhi-based Trontek Electronics unveiled its answer to that job — the EKOM, a 5 megawatt-hour (MWh) containerised battery energy storage system (BESS) for industrial and utility-scale use. It is the company’s step from the batteries that power India’s electric two- and three-wheelers into the much bigger league of grid-scale storage, and it arrives with the kind of numbers that make energy engineers sit up.
The EKOM system packs 5 MWh of storage into a standard 20-foot container, built around lithium iron phosphate (LFP) cells — the chemistry prized for its thermal stability and safety. The company says its intelligent liquid-cooling thermal management keeps cell temperatures uniform across the whole array, pushing system efficiency above 93 per cent. The system is built for the long haul too: the company says it delivers a cycle life beyond 9,000 cycles and a calendar life of more than 15 years, so a single container installed today is designed to keep smoothing solar output and shaving peak demand well into the 2040s.
That is exactly the work India needs storage to do. A containerised system like EKOM can soak up solar power at midday, release it through the evening peak, keep a factory running through a grid disturbance, and give a utility a flexible tool for renewable energy integration — all from a unit that ships as a container, installs as a package, and scales simply by adding more containers side by side.
EKOM is the flagship of a storage family Trontek is building out across every scale. The company says its range runs from around 215 kilowatt-hours (kWh) for smaller sites up to the 5 MWh container, with POWERCUBE covering homes, NOVARA covering commercial facilities, and EKOM covering industrial and utility projects. At REI Expo 2026 the company also showed its EKOM storage cubes for commercial and industrial sites: a 261 kWh cube delivering 125 kW at 832 V, and a 418 kWh cube delivering 215 kW at 1,331.2 V, both built on 314 Ah LFP cells with liquid cooling, an IP54 rating and an aerosol fire-suppression system, and both able to run on or off the grid — including black-starting a site when the grid goes down.
Trontek brings more than two decades of battery-making to this new stage. The company was started in 2004 by founder and CEO Samrath S. Kochar, and it grew up building the lithium-ion batteries that helped electrify India’s streets — the company says it developed India’s first lithium-ion battery for e-rickshaws in 2016, and that its battery systems now power more than 1.3 million electric vehicles, supplied to more than 200 original equipment manufacturers. That hard-won manufacturing depth — plants in the National Capital Region and a research and design centre in Bengaluru — is now being turned to the storage market, with the company currently running 3 GWh of active manufacturing capacity and planning to scale to 12 GWh by 2028.
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Speaking ahead of the unveiling, Kochar said: “Energy storage is becoming central to how India powers its next phase of growth. With EKOM, we are taking Trontek’s two-decade battery expertise into large-scale energy storage, building capabilities in India for the country’s evolving industrial and energy needs. Our ambition is to contribute to a globally competitive Indian energy storage ecosystem.”
That is the promise of EKOM in a sentence: the same Indian engineering that put a million-plus electric vehicles on the road, now scaled up to a container that can hold a small town’s evening in a box. As India’s solar and wind fleets keep growing, the grid will need thousands of such boxes — and with EKOM, one of the companies building them is proudly, unmistakably Indian.
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