Tata Power has received approval from the Maharashtra Electricity Regulatory Commission (MERC) to implement a 100MW battery energy storage system (BESS) in Mumbai, India, with plans to complete the installation by 2027.
The BESS, featuring “black start” capabilities, will facilitate a rapid restoration of power to essential services such as the metro, hospitals, airports and data centres during grid disruptions. This will help avert widespread blackouts and bolster the resilience of Mumbai’s power network.
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The system’s advanced technology will enhance reactive power management, optimising peak demand efficiency and reinforcing the city’s overall power infrastructure.
With its high ramp-rate capability, the BESS will enhance peak load management, providing a stable and balanced power supply during times of high demand. By storing energy when prices are low and utilising it during peak hours when costs are higher, the BESS will help lower power purchase expenses, ultimately leading to reduced tariffs for consumers in the future.
The complete 100MW system will be installed across ten strategically located sites, particularly near load centres across Mumbai Distribution, centrally monitored and controlled from Tata Power’s power system control centre.
Among the future initiatives to be undertaken is the integration of the BESS into the distributed energy resource management system to improve operational efficiency.
With a focus on safety, Tata Power plans to implement three layers of temperature monitoring and fire suppression systems at cell, module and rack levels within the BESS. This approach is expected to achieve high round-trip efficiency with minimised auxiliary consumption, boosting operational performance and prolonging the lifespan of the storage system to support Mumbai’s energy sustainability objectives.
Tata Power, a subsidiary of India’s multinational conglomerate Tata Group, has a diverse portfolio of 15.6GW. This portfolio encompasses the entire power value chain, comprising renewable and conventional energy generation, transmission, distribution, trading, storage solutions and the manufacturing of solar cells and modules.
Tata Power generates 6.7GW of clean energy, which accounts for 43% of its overall capacity.
It has committed to achieving carbon neutrality before 2045.
In March 2025, Tata Power Renewable Energy Limited signed an MoU with the government of the Indian state of Andhra Pradesh to explore the development of 7GW of renewable energy projects.
