The Energy Regulatory Commission (ERC) has approved Prime Solar Solutions Corp.’s plan to build and own a dedicated power line for its Maragondon, Cavite solar plant, a move seen as boosting the Philippines’ renewable energy push.
In a decision dated November 26, 2025, the regulator authorized Prime Solar, a unit of Enrique Razon-led Prime Infrastructure Capital Inc., to construct, operate, and own a 115-kilovolt facility connecting its 48.1-megawatt Maragondon Solar Power Plant to Manila Electric Company’s (Meralco) grid.
The ₱1.6 billion interconnection includes a substation and over 20 kilometers of transmission line in Cavite province. Prime Solar reported completing the assets last February and was granted a provisional authority to operate the solar plant the following month.
The approval comes with conditions. The ERC mandated that the facilities serve only the Maragondon plant and must be operated and maintained by Meralco, with costs charged back to the developer.
A key provision requires Prime Solar to turn over any part of the line or substation to Meralco at no cost if it later becomes essential for other customers, protecting public utility assets.
Technical studies by Meralco and the National Grid Corporation of the Philippines (NGCP) found the solar plant’s output could be absorbed by Meralco’s local substation in Taguig without requiring grid upgrades, easing integration concerns.
“The generation dispatch of the project will be fully consumed by MERALCO loads… and there is no backflow of power,” NGCP’s assessment stated.
The ERC emphasized that prior approval for such private connections is “indispensable and non-negotiable.” Prime Solar must submit compliance documents within 30 days and settle the ₱12 million permit fee within 15 days of receiving the order.
Prime Infra, the parent firm, holds major stakes in Manila Water Company Inc. and the Malampaya gas field project.
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