Meine Electric’s Iron-Air Battery Selected for Utility-Scale Pilot at NTPC Simhadri

Indian deep-tech startup Meine Electric is preparing to test its indigenous iron-air battery technology under utility-scale conditions after the system was selected for a pilot project at NTPC’s Simhadri Thermal Power Station in Andhra Pradesh.

The project, being led by the Atal Incubation Centre – Anna University (AIC-AU), will evaluate the battery as a potential long-duration energy storage, or LDES, solution for India’s rapidly changing power grid. The pilot is expected to provide real-world data on the technology’s technical performance, reliability and operating behaviour under power-station conditions.

For India, where renewable power capacity is expanding rapidly, such storage systems could eventually help bridge the gap between periods of high solar and wind generation and periods when renewable output falls.

Six-Hour Charging and 18-Hour Discharge

At the centre of Meine Electric’s technology is what the company describes as a Fast-Charge, Long-Discharge (FCLD) energy-storage architecture. According to the startup, the system can be charged over approximately six hours and subsequently discharge electricity for as long as 18 hours.

This operating profile places the technology in a different category from conventional short-duration battery installations that are generally intended to shift electricity over only a few hours.

Long-duration storage could become increasingly important as grids absorb larger amounts of intermittent renewable energy. Solar generation, for example, peaks during daylight hours but falls rapidly after sunset, while electricity demand can remain high well into the evening and night.

An 18-hour discharge capability could therefore support applications such as renewable-energy firming, extended power shifting and grid balancing.

Technology Based on Reversible Rusting

Meine Electric’s battery uses iron-air chemistry, relying on iron and oxygen rather than expensive or relatively scarce battery materials.

The underlying electrochemical process is based on the reversible oxidation of iron. During discharge, iron reacts with oxygen and forms iron oxide — essentially a controlled rusting process — while releasing electrical energy. During charging, the electrochemical reaction is reversed and the iron oxide is converted back into metallic iron.

Because iron is widely available and comparatively inexpensive, iron-air batteries are being explored internationally as one possible route towards lower-cost energy storage capable of operating over considerably longer periods than conventional lithium-ion systems.

The chemistry is particularly attractive for stationary grid storage, where size and weight are generally less important than cost, durability, safety and the ability to store large amounts of electricity for extended periods.

Independent Testing by Customized Energy Solutions

Meine Electric says the performance of its technology has also undergone independent evaluation by Customized Energy Solutions (CES), the parent organisation of the India Energy Storage Alliance.

Testing carried out at the CES Battery Laboratory examined areas including electrochemical performance, capacity retention and operational stability during charging and discharging cycles.

The independent testing provides an additional validation step as the company moves from laboratory development towards larger demonstrations and eventual commercial deployment.

The NTPC Simhadri pilot will now provide another crucial layer of information by testing the system within an actual utility environment rather than under laboratory conditions alone.

Generating Real-World Data for Long-Duration Storage

The pilot is expected to examine how the battery performs when exposed to the operational demands of a large power station.

Data generated through the project could help determine the technology’s suitability for future long-duration energy-storage deployments and identify areas requiring further engineering or optimisation.

Meine Electric believes such systems could eventually contribute to round-the-clock clean electricity, improved grid flexibility and better utilisation of renewable-energy resources.

They could also have applications in improving the flexibility of existing thermal generating assets as India gradually integrates a larger share of variable renewable generation into its electricity network.

Potential Cost Below ₹4 per Unit of Stored Electricity

One of the most significant claims surrounding Meine Electric’s technology concerns its potential economics.

The company says its iron-air platform could eventually achieve a levelised cost of storage below $0.05 per kWh, or roughly ₹4 per kWh.

If demonstrated consistently at commercial scale, such economics could make long-duration energy storage considerably more accessible for applications where conventional battery solutions remain expensive.

However, achieving competitive storage costs at laboratory or pilot level is only one part of the challenge. Commercial viability will also depend on manufacturing costs, system lifespan, round-trip efficiency, maintenance requirements, deployment scale and performance over thousands of operating cycles.

The Simhadri pilot therefore represents an important opportunity to gather operational evidence beyond laboratory testing.

Building Storage for India’s Renewable-Heavy Grid

India’s expanding solar and wind capacity is increasing the importance of technologies capable of storing surplus electricity and supplying it when generation falls.

Short-duration batteries can provide frequency regulation, peak shaving and several hours of energy shifting. But power systems with very high renewable penetration are also likely to require storage capable of operating for much longer periods.

Iron-air batteries could potentially complement technologies such as lithium-ion batteries and pumped-storage hydropower rather than replacing them outright. Different storage technologies can serve different requirements depending on response time, duration, cost and location.

Meine Electric is positioning its system primarily for daily cycling applications, renewable-energy firming and improved flexibility of power-generation assets.

Indian Deep-Tech Startup Founded in 2023

Meine Electric was founded in 2023 by Priyansh Mohan and Stuti Kakkar with a focus on developing long-duration energy-storage technology using abundant materials.

The company is seeking opportunities not only in India but also across the wider Asia-Pacific, Middle East and African markets, where renewable-energy expansion is generating demand for new forms of grid storage.

Utilities and energy-intensive industries are among the potential customers for such systems.

Priyansh Mohan, Co-Founder and CEO of Meine Electric, described the utility pilot as an opportunity to demonstrate the battery under real operating conditions while generating the performance information required to accelerate further development of cost-effective long-duration storage.

From Laboratory Chemistry to Power-Grid Infrastructure

For emerging battery technologies, the transition from laboratory testing to utility deployment is one of the most important stages of development.

A chemistry may perform successfully in controlled conditions but still needs to demonstrate reliability, manufacturability, economic viability and long-term stability when deployed as part of actual energy infrastructure.

The NTPC Simhadri project therefore represents more than a demonstration of a new battery chemistry. It will test whether an Indian-developed iron-air system can begin making the transition towards practical grid-scale deployment.

If the technology performs successfully and its projected economics can be maintained as production scales, Meine Electric’s iron-air platform could become part of a broader portfolio of indigenous storage solutions required to support India’s increasingly renewable-heavy electricity system.

The pilot also reflects a wider shift within India’s clean-energy ecosystem: from merely expanding renewable generation capacity towards developing the technologies needed to store, manage and deliver that electricity reliably around the clock.

---