Electricity in Tamil Nadu
Demand, supply and shortages in Tamil Nadu, day by day since 2023. Source: NLDC daily reports, data through 29 Oct 2026.
Tamil Nadu’s year in demand
The highest demand met in each week, every year on one axis. Tap a year to pick it out.
When Tamil Nadu ran short
Every day shaded by the electricity demanded but not supplied.
Supplied on an average day
Energy met per day, month by month, in gigawatt-hours.
Peak demand
The month's highest demand met, in gigawatts.
Supplied within Tamil Nadu
Share of demand met without drawing from the interstate grid.
How evenly Tamil Nadu uses power
Average demand as a share of the month's peak (the load factor). Dashed: India.
How closely Tamil Nadu sticks to plan
Electricity drawn above (red) or below (navy) the state's schedule, month by month.
Key figures: electricity in Tamil Nadu
In October 2026, Tamil Nadu was supplied 375 GWh of electricity on an average day, with demand peaking at 20.6 GW on 8 Oct 2026. That is 15.1% more per day than in October 2025.
The highest demand ever met in Tamil Nadu since 2023 is 21.7 GW, on 14 Jul 2026.
In the last 365 days, Tamil Nadu saw demand go unmet on 2 days, 9.6 million units (MU) in all. The deepest shortage was 5.3 MU on 9 Sep 2026.
Over the last 12 complete months, Tamil Nadu met 47% of its demand without drawing from the interstate grid. This is a residual: energy met minus scheduled drawal and deviation, so a central station inside the state that is scheduled through the interstate grid counts as grid supply.
Its load factor, average demand as a share of the month's peak, was 76% in October 2026, against 83% for India as a whole.
| Month | Average day (GWh) | Peak (GW) | Own supply | Load factor | Shortage (MU) |
|---|---|---|---|---|---|
| October 2026 | 375 | 20.6 | 41.9% | 75.7% | 0 |
| September 2026 | 408 | 21.4 | 55.4% | 79.3% | 9.59 |
| August 2026 | 409 | 21.6 | 61.8% | 78.8% | 0 |
| July 2026 | 445 | 21.7 | 60.6% | 85.3% | 0 |
| June 2026 | 415 | 21.2 | 55.4% | 81.5% | 0 |
| May 2026 | 400 | 19.8 | 45.4% | 84.2% | 0 |
| April 2026 | 431 | 21.3 | 40.1% | 84.2% | 0 |
| March 2026 | 395 | 20.2 | 41.9% | 81.4% | 0 |
| February 2026 | 362 | 19.3 | 43.5% | 78.0% | 0 |
| January 2026 | 325 | 17.6 | 42.5% | 76.8% | 0 |
| December 2025 | 327 | 17.8 | 40.1% | 76.5% | 0 |
| November 2025 | 335 | 18.0 | 41.0% | 77.5% | 0 |
| October 2025 | 325 | 17.9 | 46.9% | 75.8% | 0 |
Data through 29 Oct 2026. Figures may be revised as the source republishes.