Hydroelectric plants use rivers to generate clean power in Luzon, Visayas, and Mindanao

About 12 percent of the Philippines’ electricity generation comes from hydroelectric plants, according to industry data — a share that has held steady even as solar and wind capacity have grown. That consistency is partly why companies like First Gen Corporation and SN Aboitiz Power Group continue to invest in hydro, and why manufacturers such as Engtek Group are choosing it to power their factories. Unlike other renewables, hydro can run around the clock as long as the river flows, making it a natural complement to intermittent sources.

First Gen reported a 12 percent decrease in attributable recurring net income for 2024, falling to USD 245 million from USD 277 million the prior year, partly due to increased investments in LNG and hydroelectric power. The earnings dip reflects a deliberate shift: the company is betting that hydro and gas will anchor the grid as coal retires. Meanwhile, Engtek Group completed the transition of its Laguna-based Asaba Manufacturing plant to 100 percent renewable hydroelectric power, cutting coal dependence entirely. These two moves — one at the generation level, one at the consumption level — show hydro’s expanding role in the country’s energy transition.

Why now? The Philippines needs dispatchable renewable capacity that can smooth out the variability of solar and wind. Hydro offers exactly that, provided the watershed is healthy. But the country’s hydro fleet is aging, and rehabilitation costs are high. The current moment is a balancing act between investing in existing plants and building new ones, all while keeping electricity rates stable.

How Hydroelectric Generation Works in the Philippines

Hydroelectric plants convert the kinetic energy of flowing water into electricity. In the Philippines, the most common configuration is a dam that creates a reservoir, then releases water through turbines. The Agus-Pulangi Hydropower Complex in Mindanao is one of the largest such systems, and First Gen has expressed openness to studying its rehabilitation and operation. On Luzon, the Casecnan Hydroelectric Plant in Nueva Ecija has been a key asset, though it recently faced compliance issues. The technology itself is mature, but the challenge in the Philippines is that many of the large plants were built decades ago and need upgrades to stay efficient and safe. That reality is what makes the current investment cycle — and the regulatory environment around it — worth watching for anyone tracking the country’s power mix.

The Key Players Driving Hydro Investment

Three names emerge from recent developments: First Gen, SNAP, and Engtek. Each represents a different piece of the hydro puzzle.

First Gen Corporation is the largest listed power producer in the Philippines by capacity. Its openness to studying the Agus-Pulangi complex signals that the company sees hydro as a strategic complement to its LNG and geothermal portfolio. The 12 percent earnings dip in 2024 was partly due to upfront investments in these areas, meaning the payoff is expected further out. First Gen subsidiary First River Lakes Corp. (FRLC) operates the Casecnan plant and was recently fined by the Philippine Electricity Market Corporation (PEMC) for compliance issues — a reminder that hydro operations carry regulatory teeth.

SN Aboitiz Power Group (SNAP) takes a different approach. Its Host Communities’ Forums are an annual exercise in ESG-driven stakeholder engagement. For communities near hydro plants — often in mountainous, indigenous areas — this is where concerns about water rights, displacement, and benefit-sharing get aired. SNAP’s approach suggests that long-term hydro operation depends on social license, not just engineering.

Then there’s Engtek Group, whose Asaba facility in Laguna now runs entirely on hydroelectric power. This is a corporate-level decision that bypasses the grid entirely — a manufacturer buying renewable energy directly to power its operations. It’s a model that could scale as more companies seek to decarbonize their supply chains.

Complications, Compliance, and the Cost of Aging Plants

Hydroelectric power in the Philippines is not without its complications. The most immediate issue is the age of many facilities. The Agus-Pulangi complex, for instance, has been operating for decades and requires significant rehabilitation. First Gen’s interest is preliminary, but any investor would need to evaluate the cost of upgrades against the power purchase agreements available.

Regulatory Compliance and Penalties

In October 2025, First River Lakes Corp. (FRLC), a First Gen subsidiary, received two penalty notices from the Philippine Electricity Market Corporation (PEMC) for compliance issues related to the operation of the Casecnan Hydroelectric Plant. While the details of the violations were not specified in the reporting, the fines show that the electricity market regulator is actively monitoring hydro plant operations. For operators, this means that compliance systems need to keep pace with plant operations — a non-trivial cost.

Environmental and Social Trade-offs

Large hydro projects require dams, reservoirs, and sometimes the relocation of communities. Even when a plant is already built, ongoing operations affect downstream water flow, irrigation, and fisheries. SNAP’s Host Communities’ Forums are one mechanism for addressing these issues, but the tension between clean power generation and local environmental impact is real. The Philippines has a history of controversy around large dams, and any new hydro project or major rehabilitation will face scrutiny.

Financial Viability and Investment Risk

First Gen’s 12 percent earnings decline in 2024, falling to USD 245 million, was partly driven by investments in hydro and LNG. For investors, the question is whether hydro can deliver returns comparable to coal or natural gas. The answer depends on regulatory support, the cost of capital, and the speed at which the grid needs balancing capacity. Hydro’s advantage is its longevity — well-maintained plants can operate for 50 years or more — but the upfront rehabilitation cost for aging plants is substantial.

What This Means for Different Stakeholders

For Power Companies

If you’re a power producer evaluating hydro, the immediate opportunity lies in rehabilitating existing plants rather than building new ones. The Agus-Pulangi complex is the most prominent example, but there are smaller plants across the country that could be upgraded. The regulatory environment, as the Casecnan fines show, requires tight compliance. Partnering with local governments and communities, as SNAP does, is not optional — it’s a prerequisite for long-term operation.

For Manufacturers and Large Power Users

Engtek’s move to 100 percent hydro power at its Asaba plant in Laguna offers a template. If your facility is in an area served by a hydro plant or a renewable energy provider, you can negotiate a direct power purchase agreement. This cuts coal dependence and strengthens your ESG profile. The key is to verify that the hydro source is genuinely additional and not just diverting existing renewable energy from the grid — a concern known as “double counting.”

For Communities Near Hydro Plants

If you live near a hydroelectric facility, engagement with the operator is your strongest tool. SNAP’s Host Communities’ Forums show that structured dialogue can lead to tangible benefits. Ask about water flow management, emergency protocols, and community development funds. The power company’s social license depends on your community’s support, so use that leverage.

Frequently Asked Questions

Looking Ahead

Hydroelectric power in the Philippines is at a pivot point. The plants exist, but many need rehabilitation. Companies like First Gen and SNAP are actively investing, while manufacturers like Engtek are proving that 100 percent hydro power is feasible at the factory level. The regulatory framework is active — the PEMC fines show that compliance is enforced — and the social dimension, through community forums and ESG commitments, is increasingly central. If you’re following the energy landscape, watch three things: the progress of the Agus-Pulangi rehabilitation, the expansion of corporate hydro power purchase agreements, and how the grid integrates hydro alongside natural gas and variable renewables. Each will tell you whether hydro remains a backbone of Philippine power or becomes a niche player.

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Sources

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Hydro Power coverage. Power Philippines, 2025.