Tata Power has strengthened Mumbai’s electricity distribution network with 60 MWh of operational Battery Energy Storage Systems (BESS) across three strategic locations: Mahalaxmi, Saki and Mankhurd. The installations support the company’s efforts to improve grid reliability, manage peak electricity demand and enhance power supply resilience for more than 8 lakh consumers across the city.
The battery storage systems are designed to store electricity during lower-cost solar generation hours and discharge it during periods of high evening demand. This enables energy arbitrage, improves electricity utilisation and helps optimise power procurement costs by reducing dependence on expensive peak-hour electricity.
Equipped with fast-response and high ramp-rate capabilities, the BESS installations support dynamic load management and allow Mumbai’s distribution network to respond quickly to changing electricity demand. Operating at approximately 1–1.5 cycles per day, the systems contribute to peak load management and more efficient power procurement.
The decentralised, grid-connected installations also strengthen local energy storage and dispatch capabilities. Their black-start functionality can support grid restoration during power system disturbances, helping improve the overall resilience of Mumbai’s electricity infrastructure.
The operational 60 MWh capacity represents progress towards Tata Power’s larger energy storage plans for Mumbai. In April 2025, the company received approval from the Maharashtra Electricity Regulatory Commission (MERC) to deploy a 200 MWh BESS across 10 strategic locations in the city.
The larger initiative aims to improve grid stability, manage peak demand, enhance reactive power management and support faster restoration of electricity supply to critical infrastructure. These include hospitals, Metro services, airports and data centres.
Through the deployment of battery energy storage and advanced grid management solutions, Tata Power is working to modernise Mumbai’s electricity distribution infrastructure. The initiative is expected to support the city’s growing electricity requirements while improving operational flexibility and facilitating greater integration of renewable energy into the power network.
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