Delhi is unusual among Indian states: it does not have a single glossy “BESS policy” document the way Gujarat or Maharashtra do. Instead, storage in Delhi grows through a series of projects that individual DISCOMs (distribution companies) take to the DERC (Delhi Electricity Regulatory Commission) for approval, one by one. That quieter, project-by-project route has still produced a national first — the country’s first commercial battery built at the distribution level — and a working template that other cities are now copying.
This page pulls the Delhi story together in plain English: the landmark Kilokari project, DERC’s view on how long a battery should last, the expansion pipeline, and why a record-breaking peak demand is driving all of it.
The landmark: BRPL’s Kilokari battery
In May 2024 the DERC approved what is widely called India’s first commercial standalone BESS at the distribution level — a 20 MW / 40 MWh battery at BSES Rajdhani Power Limited’s (BRPL) 33/11 kV Kilokari substation in south Delhi. BRPL is one of Delhi’s three DISCOMs, alongside BSES Yamuna Power Limited (BYPL) and Tata Power Delhi Distribution Limited (Tata Power-DDL). The project was built and commissioned by IndiGrid around April 2025.
Two numbers make it a template worth studying:
- Tariff: a levelised ₹57.6 lakh per MW per year — reported to be roughly 55 percent lower than an earlier benchmark of about ₹130 lakh per MW per year. That price collapse is what made a regulator comfortable signing off.
- Financing: the Global Energy Alliance for People and Planet (GEAPP) provided concessional financing covering about 70 percent of project cost, plus technical and commercial support — a deliberate move to prove the model before the market took over.
The battery sits inside the local network to firm up supply for a reported 12,000-plus consumers, integrate rooftop solar, and hold voltage steady during peak hours. This is peak shaving applied right at the substation rather than out on the transmission grid.
DERC’s rule of thumb: 2 hours, not 4
A key policy signal came when DERC weighed in on how long a distribution battery should be able to discharge. Reviewing BRPL’s proposals, the commission concluded that a 2-hour system is adequate for peak shaving, managing demand swings, frequency response, and relieving congestion at the distribution level. Longer 4-hour-plus batteries, it noted, are better suited to system-wide firming and covering the full evening peak — a different job, usually handled higher up the grid.
That is a practical stance: 2-hour systems cost less per MW and still cover the sharp, short spikes that hurt a city DISCOM most. It aligns Delhi with the Ministry of Power’s push for co-located storage while keeping tariffs affordable. For context on why duration and cost trade off the way they do, see our note on round-trip efficiency and degradation and the central BESS policy framework that Delhi’s DISCOMs operate under.
The expansion pipeline
Kilokari was a pilot with a purpose. BRPL has since moved to expand storage across several grids, with DERC granting in-principle approval to projects including:
- Matiala (G5): 32 MW / 64 MWh
- Shivalik, Malviya Nagar: 12.5 MW / 25 MWh
- Goyala Khurd: 7 MW / 14 MWh
- Dwarka (G7): 4 MW / 8 MWh
The Shivalik project alone is reported to deliver an estimated benefit of about ₹11.5 crore a year over a 12-year life, chiefly from avoided peak-power purchases and deferred network upgrades. Each is structured as a 2-hour system, consistent with DERC’s guidance. This is the same DISCOM peak-shaving BESS model spreading across India, with Delhi an early and closely watched proving ground.
Why Delhi needs it: a demand problem
The driver is stark. Delhi’s peak power demand hit an all-time high of 8,748 MW in late June 2026, beating the previous record of 8,656 MW, and the load dispatch centre expected it to cross 9,000 MW over the summer. Roughly split across the DISCOMs, BRPL served about 3,900 MW, Tata Power-DDL about 2,500 MW, and BYPL about 1,900 MW at peak.
For a small, dense, import-dependent grid, those few hours of blistering afternoon demand are the most expensive power the DISCOMs buy all year — the exact problem demand charges and time-of-day tariffs are designed to price. A battery charged on cheaper daytime solar and discharged into the peak shaves that costly slice, which is why Delhi’s economics for storage stack up even without a headline state subsidy.
What this means for you
- DISCOMs and utilities: Delhi shows you don’t need a state BESS policy to build storage — a well-argued DERC petition with a competitive tariff and a clear peak-shaving benefit is enough. The Kilokari tariff of ₹57.6 lakh/MW/year is a public benchmark you can point to.
- Developers and EPCs: the pattern here is many small, substation-sited 2-hour systems rather than one giant tender. That favours modular, standardised standalone BESS hardware that drops into an urban 33/11 kV yard.
- C&I users in the NCR: the same peaks that strain the grid strain your bill; behind-the-meter storage can cut demand charges directly.
If you are sizing a substation or a C&I battery against Delhi’s peak-demand and tariff numbers, run your load through our savings calculator to see where storage pays back.
Policy snapshot as of July 2026. Delhi procures storage through individual DERC orders rather than a single policy, and terms change by order and notification — verify current provisions before financial decisions.