Net Metering in the Philippines

The legal basis: RA 9513

Net metering in the Philippines is established under Republic Act 9513 (Renewable Energy Act of 2008) and operationalized through ERC Resolution 09 series of 2013. The framework gives residential and small commercial customers the right to interconnect solar to their distribution utility (Meralco, Visayan Electric, Davao Light, etc.) for systems at or below 100 kW — well above any home install.

Net metering is a separate program from Feed-in Tariff (FiT). FiT is for utility-scale renewable generators. Net metering is the residential / small commercial program.

The PEE requirement — and why DIY does not skip it

All grid-tie installations in the Philippines must be designed and certified by a Professional Electrical Engineer (PEE). This is not optional. The utility will not accept a net metering application without a PEE-stamped single-line diagram and equipment list.

Practical implication for DIY builders: you can still source and install all hardware yourself, but you must hire a PEE to review the design and stamp the documents. PEE fees vary, but a residential signoff is significantly cheaper than a full installer quote because they are only certifying compliance, not installing.

Off-grid and pure hybrid setups that never export do not need PEE signoff and do not need to apply for net metering. If you are building purely off-grid, everything in this page is optional reading. See the Meralco solar guide for that decision.

How bill credits actually work

The catch most articles skip: net-metering credits are not at the full retail rate you pay for imported energy. Your utility credits exports at its blended generation rate, which is roughly 50-60% of the retail rate.

Concrete example, using April 2026 Meralco numbers:

• Imported energy charge (retail): P14.35/kWh
• Generation rate (export credit): roughly P8.39/kWh
• Self-consumption value: P14.35/kWh (saved at full retail rate)
• Export value: P8.39/kWh credited on next bill

Implication: it is far better to self-consume your solar (use it directly) than to export it. Sizing your system slightly under your daytime load and using a battery for evening load gives the best financial return. Oversizing for net metering only makes sense if your solar system would otherwise be idle for hours.

Application steps with Meralco

1. Decide your system size (must be 100 kW or smaller).
2. Hire a Professional Electrical Engineer to design and stamp the single-line diagram.
3. Submit the Net Metering application form with PEE documents to Meralco (or your distribution utility). Forms are available from each utility's website.
4. Pass the Distribution Impact Study and equipment inspection. The utility may request changes if your inverter or breakers fail to meet protection standards.
5. Sign the Net Metering Agreement (NMA) and pay any installation fees.
6. The utility installs a bi-directional meter; export credits begin appearing on bills.

Standard processing time used to run 30-90 days. The Department of Energy issued a directive in 2026 mandating a 10-day approval target under the state of national energy emergency, but actual timelines vary by utility and backlog. Plan for 4-8 weeks even under the new rules.

Should you bother with net metering?

Yes if:

• You want to install a system larger than your daytime load (5 kW+ for most households).
• You are not building a battery and want some value from midday surplus.
• Brownouts in your area are infrequent — you do not need backup.

Skip it if:

• You are building pure off-grid (no Meralco connection at all).
• You are sized to self-consume — small system that produces only what your house needs during the day.
• You want brownout protection — pure grid-tie inverters shut off when the grid is down, a hybrid inverter handles both worlds.

The grid-tie vs hybrid vs off-grid decision is laid out in detail in the Meralco solar guide.