6 sites across Delhi, India


ESS for energy arbitrage and peak load shaving at overloaded distribution transformers

System size:

50-160kW / 120-250kWh x 6



BSES Rajdhani had proposed to set up 6 Li-ion based Battery Energy Storage Systems (BESS) connected to the LV side of distribution transformers across Delhi. The BESS were envisioned to be used for energy cost arbitrage during the winter months and for peak load shaving during the summer months. The total capacity to be installed was roughly 500kW / 1500kWh.

Energy Storage connected at Distribution Transformers within the utility network

The project was executed by Coslight (a Li-ion battery manufacturer) and AmpereHour Energy starting from February 2021. Several challenges were faced during project execution due to the difficult, space contrained locations in which the BESS had to be set up as well as external challenges related to the Covid pandemic second wave. However, despite the hurdles, the project was successfully completed by the first week of December 2021, handed over and is in operation.

This project features a central Energy management system, developed by AmpereHour Energy, set up in the BSES Rajdhani SCADA center, which allows BSES Rajdhani to centrally control and monitor the operation of all 6 distributed BESS sites, creating the first of its kind Virtual Power Plant (VPP) in the country. The BESS can be set up in multiple modes of operation such as Energy shift, Peak shaving, manual mode etc. and the configuration for each of these modes can be set remotely.