Iron-Air Battery Pilot Project to Test Long-Duration Energy Storage at NTPC Simhadri

Iron-Air Battery Pilot Project Planned at NTPC Simhadri

The Iron-Air Battery Pilot Project is planned at NTPC Simhadri Thermal Power Station to evaluate an indigenous long-duration energy storage system under utility operating conditions. The project will be implemented by Atal Incubation Centre – Anna University at NTPC Simhadri, with technology partner Meine Electric. The pilot is intended to assess the technical performance, operational reliability and operating characteristics of the Iron-Air battery system in real-world conditions. It will also generate operational data to evaluate the technology’s suitability for long-duration energy storage applications and provide insights that can support further development and potential commercial-scale deployment.

Six-Hour Charging and 18-Hour Discharge Cycle

Meine Electric said its proprietary Fast Charge Long Discharge technology enables a six-hour charging period followed by an 18-hour discharge. The technology has been independently evaluated by Customized Energy Solutions, with testing covering electrochemical performance, capacity retention and operational stability over the six-hour charging and 18-hour discharging cycle. These characteristics are particularly relevant to long-duration storage applications, where systems must retain reliable performance over extended operating periods. The NTPC Simhadri pilot will provide an opportunity to assess these stated operating characteristics under actual utility conditions rather than solely through laboratory or controlled testing environments.

Pilot to Generate Utility-Scale Performance Data

Under the AIC-Anna University initiative, Meine Electric will be responsible for development, system integration and performance monitoring of the Iron-Air battery system. The operational data and technical insights generated through the pilot are expected to support further technology development and assessment for future commercial-scale deployment. The project will examine system performance under utility operating conditions, providing practical information on reliability and operating characteristics. Such field data can help determine how the technology performs when integrated into an actual power-generation environment and whether its characteristics can support broader long-duration energy storage requirements.

Role in Renewable Energy and Grid Flexibility

The pilot is being undertaken as India expands its renewable energy capacity and seeks energy storage technologies capable of addressing renewable generation variability and grid flexibility requirements. Long-duration storage can support the management of differences between renewable electricity generation and demand by retaining energy for extended periods. For an Iron-Air system, the planned demonstration can therefore provide operational evidence relevant to renewable energy firming and flexibility applications. The project’s results are expected to contribute to understanding how indigenous storage technologies could be developed for larger-scale applications as energy systems increasingly incorporate variable renewable generation.

Meine Electric Iron-Air Battery Technology

Meine Electric describes itself as an Indian deep-tech startup developing Iron-Air battery systems for long-duration energy storage. Its stated technology uses a proprietary chemistry and is designed around a six-hour charge and 18-hour discharge cycle. The company said its Iron-Air technology is being developed for applications including renewable energy firming and thermal asset flexibility. Meine Electric is also working towards larger-scale demonstrations and commercial deployment. The NTPC Simhadri pilot represents a practical step in evaluating the technology beyond development-stage testing by generating performance information under utility operating conditions.

AIC-Anna University's Role in the Project

Atal Incubation Centre – Anna University is a Section 8 non-profit organisation established under the Atal Innovation Mission, NITI Aayog, and hosted by Anna University, Chennai. The incubator supports startups across areas including clean and sustainability technology, electric mobility, health sciences, artificial intelligence and advanced manufacturing. Its involvement in the project provides an institutional platform for the pilot and supports the development and evaluation of emerging technology. The collaboration with Meine Electric and NTPC Simhadri brings together startup technology development, incubation support and utility operating conditions for assessment of long-duration energy storage performance.

Frequently Asked Questions

What is the purpose of the Iron-Air battery pilot at NTPC Simhadri?
The pilot is designed to evaluate an indigenous Iron-Air battery system under real-world utility operating conditions and generate performance data for future development. It will assess technical performance, operational reliability and operating characteristics while examining the technology’s suitability for long-duration energy storage applications. Meine Electric will handle development, system integration and performance monitoring, while AIC-Anna University is implementing the project at NTPC Simhadri. The resulting operational insights are expected to support further technology assessment, larger demonstrations and potential commercial-scale deployment of Iron-Air energy storage systems.