Power Supply Contracts: Liability for Fluctuations and Damages

The reliability of electric power is often taken for granted—until a fluctuation disrupts operations. For businesses that depend on a stable power supply, outages and voltage swings can mean significant production losses. But when a power supplier fails to deliver consistent energy, what exactly can the customer recover? The Supreme Court's decision in Manila Electric Company v. AAA Cryogenics Philippines, Inc. (G.R. No. 207429, November 18, 2020) clarifies the rules on liability, proof of damages, and the distinction between actual and temperate damages in power supply contracts.

The Case: A Cryogenics Plant and Unstable Power

AAA Cryogenics operated a plant producing liquid oxygen, nitrogen, and argon. Its facilities relied on computers and electronic processors that required a very stable power source. Any fluctuation could shut down the plant, lower gas purity, and halt production for hours or even days.

Between October 1997 and April 1998, AAA reported numerous power fluctuations and interruptions from Meralco. Despite repeated complaints, Meralco only advised AAA to install power conditioning equipment. AAA eventually stopped paying its electric bills, accumulating over P13 million in arrears. Meralco then disconnected service and sued for collection, while AAA sued for damages from production losses.

The Issue: Proving the Fluctuations and the Losses

The case raised two central questions: First, did the power fluctuations occur and was Meralco responsible? Second, even if Meralco was liable, did AAA adequately prove the amount of its damages?

The trial court and the Court of Appeals both found Meralco liable, relying on AAA's computer log sheets showing drops in gas purity, which indicated power problems. Meralco argued that its own monitoring system recorded only two interruptions and that the remaining fluctuations never happened.

The Ruling: Liability Established, But Damages Reduced

The Supreme Court affirmed Meralco's liability for the power fluctuations. The Court noted that Meralco's own letters acknowledged the problem, including one that outlined steps to "minimize if not eliminate power trippings." Meralco's expert witnesses also admitted that power fluctuations are inherent in the nature of electricity. These pieces of evidence, taken together, supported the finding that the fluctuations occurred and were caused by the supplier.

However, the Court found a critical flaw in AAA's claim for actual damages of P21,092,760.00. Under Article 2199 of the Civil Code, a claimant must prove pecuniary loss with a reasonable degree of certainty, based on competent proof. AAA's documents—a summary of production losses and a comparative presentation of production—had no supporting receipts, no testimony explaining how the figures were derived, and no indication of their source. The Court held these documents could be mere speculation or estimation.

Temperate Damages as a Remedy

Despite the failure to prove actual damages, the Court did not leave AAA without a remedy. Under Article 2224 of the Civil Code, temperate or moderate damages may be recovered when some pecuniary loss has been suffered, but its amount cannot be proved with certainty from the nature of the case.

Applying this principle, the Court awarded AAA P15,819,570.00 as temperate damages—three-fourths of its claimed losses. The Court also upheld the award of P300,000.00 in exemplary damages, noting Meralco's wanton disregard of its contractual obligation to deliver energy "at reasonably constant potential and frequency," especially as a public utility vested with vital public interest.

Practical Takeaways

• Suppliers of essential services owe a high standard of care. Public utilities like electric companies are expected to exercise utmost care and diligence in serving the public. Repeated failures to address known problems can lead to liability for exemplary damages.
• Proving the breach is not enough; prove the amount. A successful claim for actual damages requires more than a calculation on paper. Claimants should present receipts, invoices, audited statements, or expert testimony explaining how the loss figures were derived.
• Temperate damages fill the gap. When a loss clearly occurred but cannot be precisely quantified, courts may award temperate damages under Article 2224 of the Civil Code. This allows recovery for genuine losses without requiring impossible precision.
• Document everything. AAA's computer log sheets and Meralco's own letters were crucial evidence. Businesses should keep detailed records of operational disruptions and all correspondence with suppliers.
• Consider the full scope of remedies. Even when actual damages fail, other forms of relief—temperate, nominal, or exemplary damages—may still be available depending on the circumstances.

This article is general information and not legal advice. For your specific situation, consult a lawyer or ask ASG Legal AI.