Supreme Court Clarifies Power Purchase Agreement-Contractual Obligations Cannot Be Diluted

In a landmark ruling, the Supreme Court of India on 25 September 2025 in Gujarat Urja Vikas Nigam Ltd. v. Essar Power Ltd. Neutral Citation: 2025 INSC 1160 addressed a long-standing dispute between Gujarat Urja Vikas Nigam Ltd. (GUVNL) and Essar Power Ltd. (EPL). The issue arose from a Power Purchase Agreement (PPA) of 1996, under which EPL was required to supply 300 MW to GUVNL and 215 MW to Essar Steel Ltd. (ESL), in a strict 58:42 ratio. EPL’s diversion of GUVNL’s share to ESL sparked litigation spanning nearly two decades.

The Question of Law in this judgment centers around the interpretation and enforcement of obligations under the Power Purchase Agreement (PPA) and the methodology for computing compensation for wrongful diversion of electricity.

Legal Issues Involved

(i) Interpretation of the PPA – Whether EPL (Essar Power Ltd.) was obligated to declare availability of power for the entire 515 MW plant and ensure supply in the proportion of 300 MW (to GUVNL) and 215 MW (to ESL), i.e., 58:42 ratio. (ii) Effect of correspondence between parties – Whether letters exchanged (particularly of 2000–2004) amounted to acknowledgment of EPL’s obligation to allocate power proportionately and (iii) Application of Schedule VI of the PPA – Whether dispatch instructions by GUVNL could arise only after declaration of availability by EPL.

Nature of Relief and Computation In Issue

i. Proportionate Supply: Was EPL bound to declare plant availability and supply strictly in the 58:42 ratio.?ii. Nature of Relief: Is GUVNL entitled only to compensation for diverted power or also reimbursement of fixed charges paid for capacity it did not receive? iii.Computation Method: Should diversion of electricity be calculated on an hourly basis (as per the PPA) or half-hourly basis (as per CEA’s 2005 recommendation adopted by the parties)?

Supreme Court’s Ruling

• Obligation Affirmed: EPL must declare availability for the entire 515 MW and maintain the 58:42 allocation.
• Fixed Charges Refund: GUVNL is entitled not only to compensation (HTP-1 tariff less variable costs) but also to reimbursement of fixed charges for diverted capacity.
• Half-Hourly Computation: Since EPL itself adopted CEA’s half-hourly metering recommendation, computation must follow the same.
• No Double Recovery: EPL cannot retain fixed charges from both GUVNL and ESL for the same capacity.

Practical Impact for Industry & Regulators

• For Utilities: The ruling strengthens the hands of state utilities by ensuring that contracted allocations are fully protected, preventing private players from diverting power to related entities.
• For Generating Companies: Clear warning that Contractual Obligations cannot be diluted by internal arrangements with sister concerns.
• For Regulators: Reinforces the role of GERC and other commissions in upholding contractual discipline and applying restitutionary principles.
• For Consumers: By protecting utilities from wrongful diversions, the judgment indirectly safeguards consumer interests against inflated tariffs and energy shortages.

Why This Matters

This ruling reinforces the sanctity of PPAs, ensuring utilities like GUVNL are protected from unfair diversions. It also emphasizes restitution in addition to compensation, reflecting a consumer-friendly and contract-faithful approach.

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