Electricity PPA disputes: statutory adjudication, FIFO payment appropriation, rebate denied on part-payment, and late-payment interest upheld.

Section 86(1)(f) of the Electricity Act, 2003 empowered the State Commission to adjudicate the dispute despite an arbitration clause, and the contractual foreign arbitration arrangement did not oust that jurisdiction. FIFO appropriation of the appellant's part-payments was upheld under the law of appropriation of payments, and the challenge on limitation or delay and laches failed. Rebate under the PPA was denied because it depended on full invoice payment within the stipulated time, which part-payment did not satisfy. Interest on overdue payments was sustained because the PPA expressly provided compensation for delayed payment. The concurrent findings were affirmed and the appeal failed.

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Issues: (i) whether the State Commission had jurisdiction under Section 86(1)(f) of the Electricity Act, 2003 to adjudicate the dispute or was bound to refer it to arbitration; (ii) whether the respondent was justified in adjusting the appellant's part-payments on a FIFO basis and whether the claim was barred by limitation or delay and laches; (iii) whether the appellant was entitled to rebate on part-payment of monthly invoices within five days; and (iv) whether interest on late payments was payable under the PPA.

Issue (i): whether the State Commission had jurisdiction under Section 86(1)(f) of the Electricity Act, 2003 to adjudicate the dispute or was bound to refer it to arbitration;

Analysis: The statutory scheme confers on the State Commission the discretion either to decide disputes between a licensee and a generating company itself or to refer them to arbitration. The existence of an arbitration clause does not oust that jurisdiction. The appellant participated in the proceedings on merits without seeking arbitration at the appropriate stage, and the contractual arrangement also excluded the ordinary application of the Arbitration and Conciliation Act, 1996 to the agreed foreign arbitration mechanism.

Conclusion: The State Commission was competent to adjudicate the dispute and was not bound to refer it to arbitration.

Issue (ii): whether the respondent was justified in adjusting the appellant's part-payments on a FIFO basis and whether the claim was barred by limitation or delay and laches;

Analysis: The respondent had been informed that the appellant was making only part-payments, and the concurrent findings were that the payments were being appropriated on a FIFO basis. In such circumstances, the law of appropriation of payments under the Contract Act supported the respondent's method. The Limitation Act did not govern the proceedings before the Commission, and on the facts delay and laches also did not defeat the claim.

Conclusion: The FIFO adjustment was upheld and the challenge based on limitation or delay and laches failed.

Issue (iii): whether the appellant was entitled to rebate on part-payment of monthly invoices within five days;

Analysis: The rebate under the PPA was an incentive tied to payment of the full invoice amount within the stipulated time. Part-payment of an invoice did not satisfy the contractual condition for the higher rebate. The appellant could not claim the benefit of rebate while withholding part of the invoiced amount and simultaneously disputing the balance.

Conclusion: The appellant was not entitled to the 2.5% rebate on part-payment of invoices.

Issue (iv): whether interest on late payments was payable under the PPA;

Analysis: The contractual clause on late payment embodied compensation for deprivation of money due and permitted interest on overdue amounts. The award of compound interest followed the contractual stipulation and the governing principles of restitution and compensation for delayed payment.

Conclusion: Interest on late payments was payable under the PPA and the grant of interest was sustained.

Final Conclusion: The concurrent findings of the State Commission and the Appellate Tribunal were upheld on the principal issues, and the appeal failed in full.

Ratio Decidendi: Where the contract requires full payment of an invoice as a condition for rebate and authorises compensation for delayed payment, a party making only part-payment cannot claim the contractual rebate, and the adjudicatory forum empowered by statute may decide the dispute despite the existence of an arbitration clause when arbitration has not been timely and properly invoked.

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