India’s First Multi-Site Virtual Power Plant (VPP)
BSES Rajdhani

Overview

The BSES Rajdhani DT-ESS project is a pioneering initiative in the Indian power sector, marking the country’s first successful implementation of a Virtual Power Plant (VPP). Executed by AmpereHour Energy in collaboration with battery partner Coslight, the project consists of six distributed Battery Energy Storage Systems (BESS) integrated into the low-voltage side of distribution transformers across South and West Delhi. This network is centrally managed to provide peak shaving and grid stability, serving as a high-tech blueprint for urban energy management.

Project Profile

Client: BSES Rajdhani Power Limited (BRPL)

Partner: Coslight (Battery Partner)

AmpereHour Scope: Turnkey BESS (End-to-end design, implementation, and central software)

Commissioning Date: First week of December 2021

Location: 6 Sites in Delhi (Vasant Kunj, Tughlakabad, Janakpuri B3 & B6, Pratap Market, and Lajpat Nagar)

Total Power Capacity: 0.51 MW (510 kW)

Total Energy Capacity: 1.05 MWh (Installed as 1.25 MWh to ensure committed delivery)

Technical Excellence & "Virtual" Integration

The project’s most innovative feature is its centralized control architecture, which transforms six physically separate sites into a unified utility asset.

  • ELINA-Server EMS: All sites are connected to AmpereHour’s proprietary ELINA-Server, hosted at the BSES Rajdhani SCADA centre. This allows the utility to monitor and control all six sites simultaneously as a single Virtual Power Plant.
  • Operational Versatility: The systems operate in multiple remote-configurable modes, including Energy Shift, Peak Shaving, and Manual Mode.
  • Resilience in Extreme Conditions: The BESS proved its technical durability by operating successfully in ambient temperatures ranging from 16°C to 56°C during the intense Delhi summer.

Key Applications: 6 DT Connected BESS

The system was specifically designed to address local grid constraints at the Distribution Transformer (DT) level:

  1. Peak Load Shaving: In the summer months, the BESS discharges to shave peak loads whenever DT loading exceeds 70%, effectively preventing transformer overloads.
  2. Energy Arbitrage: During winter months, the system utilizes energy cost arbitrage to maximize economic value for the utility.
  3. Power Quality Enhancement: The project successfully demonstrated Power Factor Improvement and Phase Balancing by providing unbalanced reactive power from the Power Conversion System (PCS).
  4. Infrastructure Deferral: By managing local peak stress, the BESS allows the utility to defer expensive capital expenditure on transformer and cable upgrades in congested urban areas.

Strategic Significance

Completed despite the logistical hurdles of the COVID-19 pandemic, this project achieved a high overall system availability of 96.1%. It stands as a “first-of-its-kind” proof of concept, demonstrating that distributed storage can be aggregated via software to provide grid-scale benefits, paving the way for larger utility-scale BESS deployments across India.

Join us at our next event

We will be there at India Energy Storage Week (IESW)
2026 is scheduled for July 8–10, 2026, at
Yashobhoomi (IICC) in New Delhi.

Yashobhoomi (IICC)

July 8–10, 2026 | New Delhi

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