Our Solar Roof Costs Us More per Kilowatt

Why It Matters

The pricing rule effectively taxes rooftop solar output, raising the cost of clean energy and potentially discouraging private investment in renewable projects across the archipelago.

Key Takeaways

• Solar home generated 932 kWh, bought only 471 kWh from grid.
• Grid rate rose to ₱15.70/kWh vs neighbor’s ₱15.51/kWh.
• ERC Resolution 15 taxes based on total consumption, not net imports.
• Net‑metering credits lower bill but don’t reduce unit price.
• Policy could slow rooftop solar growth across Philippines.

Pulse Analysis

The Philippines’ electricity market is among the most expensive in Southeast Asia, prompting many homeowners to install rooftop solar to hedge against volatile rates. In the featured case, the family’s out‑of‑pocket investment produced 932 kWh of clean power, enough to cut their grid purchases by more than a third. While net‑metering allowed them to sell excess energy back to the utility, the overall bill still reflected a per‑kilowatt‑hour price of roughly $0.285, slightly higher than a neighbor who relied solely on the grid at $0.28 per kWh.

The higher charge stems from the Energy Regulatory Commission’s Resolution 15, which mandates that certain fees—such as the Lifeline Subsidy and Feed‑in‑Tariff Allowance—be calculated on a consumer’s gross electricity footprint rather than the net amount drawn from the grid. By treating the total of self‑generated and imported kilowatt‑hours as the taxable base, the regulator effectively spreads fixed costs across a larger denominator, inflating the unit price for customers who generate their own power. This approach contrasts with net‑metering designs in other markets where only net imports are subject to such charges, thereby preserving the economic incentive for distributed generation.

For policymakers, the episode underscores a tension between revenue protection and renewable‑energy promotion. If the goal is to accelerate the Philippines’ transition to a decentralized, low‑carbon grid, revising the fee‑allocation methodology could restore the price advantage of rooftop solar and attract more private capital. Aligning the regulatory framework with international best practices would not only lower the effective cost of clean energy for consumers but also help the country meet its climate commitments while reducing dependence on imported fossil fuels.