Net Metering Application Process

Philippine Net Metering Application Guide — Updated for 2026 ERC Regulations

By Amiel Pineda  |  Published December 3, 2025  |  Updated April 2026

1. How Net Metering Works in the Philippines

Under Republic Act 9513 (The Renewable Energy Act of 2008), residential and commercial property owners with qualifying solar systems up to 100 kilowatts peak (kWp) are legally entitled to export excess electricity to the grid and receive peso credits on their utility bill.

It is critical to understand that you are not "selling" electricity to Meralco the way a power plant does. You are banking credits. Here is the four-part cycle:

The billing reality: You buy electricity at the Retail Rate (₱ 12/kWh) but are credited for export at only ₱ 6-7/kWh. This means you need to export roughly 2 kWh to fully offset 1 kWh purchased from the grid at night or during low-production periods. This is technically "Net Billing," not 1:1 Net Metering.

2. The Three-Phase Net Metering Process

The net metering application process in the Philippines is divided into three sequential phases, from initial document preparation through final meter activation. Understanding these phases helps homeowners and installers plan timelines and manage expectations.

3. The 7-Step Application Walkthrough

Here is the practical step-by-step process a homeowner or business goes through, from deciding to apply to flipping the switch on grid export.

Step 1: Engage a Licensed Solar Installer

You cannot apply for net metering as a solo homeowner. A licensed solar installer with a Department of Energy (DOE) registration handles the technical documentation. Most installers include net metering processing in their standard installation package — ask explicitly before signing a contract.

·         Look for DOE-registered installers at solarinstallph.com/map

·         Ask: "Does your quote include full net metering processing, or do I have to do it myself?"

·         Processing fees typically range from ₱ 15,000 to ₱ 30,000 for the installer's PEE coordination

Step 2: PEE Signs Off on Electrical Plans

A Professional Electrical Engineer (PEE) registered with the Philippine Professional Regulation Commission (PRC) must design and sign the electrical plans. This is a legal requirement under the Republic Act 9513 implementing rules.

·         Single Line Diagram (SLD) showing PV array, inverter, protection devices, and grid connection point

·         Protection Coordination Study ensuring your inverter's anti-islanding protection works with Meralco's scheme

·         Grounding/Earthing Plan

·         Loads and Demand Analysis confirming system size is appropriate for the property

Step 3: Submit Application to Your Distribution Utility

Once your installer's PEE has signed the documents, the application is submitted to Meralco (Metro Manila and nearby provinces), VECO (Visayas), or your local electric cooperative (Mindanao and rural areas).

Meralco customers: Submit via Meralco's solar desk or authorized representative. Required forms include the Service Application Form (SAF) and supporting technical documents.

Coop customers: Process may vary by cooperative. Contact your local coop's energy management or planning department for required forms.

·         You will receive a Service Application Number (SAN) — your tracking number throughout the process

Step 4: Distribution Impact Study (DIS) & DISC Issuance

The utility's engineering team runs a Distribution Impact Study — a simulation of what happens when your solar system pushes power back into the local grid. They check transformers, switchgear, voltage regulation, and protection coordination.

The DIS fee is standardized under the 2025 ERC guidelines. Meralco's fee for the Distribution Impact Methodology Certificate (DIMC) is capped at ₱ 3,000 for most residential applications. Cooperatives may charge up to ₱ 5,000.

The DU issues the Distribution Impact Study Certificate (DISC) — typically within 30 calendar days of receiving complete documents. Incomplete submissions restart the clock.

Step 5: Obtain LGU Certificate of Final Electrical Inspection (CFEI)

This is historically the most time-consuming step. Before Meralco changes your meter, the City or Municipal Engineering Office must inspect and certify your electrical installation.

Step 6: ERC Certificate of Compliance (COC)

The Energy Regulatory Commission (ERC) requires a Certificate of Compliance for all net metering participants. This is your legal "license to operate" as a grid-connected renewable energy generator.

COC Application: Submit via the ERC's simplified process for systems under 100 kW. As of 2025, the ERC has digitized much of this process.

Fee: ₱ 1,500 (standardized by ERC Advisory 2025-09-22)

Documents required: DISC, PEE-signed SLD, protection study, system specification sheets, LGU electrical permit

Timeline: ERC targets 15 business days for applications with complete documentation

Step 7: Meter Installation and System Energization

Once you have the DISC, CFEI, and COC (or proof of COC filing), you return to your utility to schedule the Bi-Directional Meter installation.

·         Bi-Directional Meter: Replaces your old "dumb" meter. It has two registers — one for Import (what you buy) and one for Export (what you sell back). Meralco installs this at no cost for residential net metering applicants.

·         REC (Renewable Energy Certificate) Meter: A second meter near your inverter may be installed to measure total generation for Renewable Energy Certificate tracking.

·         After meter install, your inverter's Zero Export mode can be disabled and your system enters full net metering operation.

4. Complete 2026 Fee Breakdown

The following fees are standardized under ERC Advisory 2025-09-22. Actual costs may vary by utility and location. Ask your installer for a line-item breakdown before signing a contract.

5. Realistic Timeline: 2 to 6 Months

The total timeline from submitting complete documents to your first net metering bill credit ranges from 2 to 6 months. The wide range is driven primarily by the CFEI step at your LGU.

6. Managing the "Zero Export" Waiting Period

During the 2-6 months while your application is being processed, you have two choices for operating your solar system:

7. What Changed: ERC Advisory September 22, 2025

The Energy Regulatory Commission's Advisory No. 2025-09-22, issued on September 22, 2025, represents the most significant update to Philippine net metering regulations in years.

8. Required Documents Checklist

Use this checklist to prepare your documents before submitting to your utility. Having these ready in advance is the single biggest factor in avoiding delays.

9. Is Net Metering Worth It?

If the process is this involved, why bother? The financial and safety arguments are compelling.

The Financial Case

Even with the lower export rate (~PhP 6.50/kWh credited vs. PhP 12/kWh paid), the credits compound. A typical 5 kW system in the Philippines exports 150-250 kWh per month on net metering — generating PhP 975-PhP 1,625 in monthly bill credits on top of self-consumption savings.

Over a 25-year solar panel lifespan, that is an additional PhP 292,000-PhP 487,000 in cumulative credits — on top of the PhP 200,000-PhP 300,000 saved through self-consumption alone.

The Safety Case

"Guerrilla solar" — connecting a solar system to the grid without a bi-directional meter and ERC COC — creates a genuine electrocution hazard for utility linemen. When Meralco's grid goes down for maintenance, an unpermitted inverter still pushing power into the line can seriously injure or kill a linesman working on what he believes is a de-energized circuit.

Net metering's mandatory anti-islanding protection ensures your inverter disconnects the moment grid power is lost. This is not just bureaucracy — it is a life-safety requirement.

The Property Value Case

A fully permitted, net-metered solar installation with documented ERC COC significantly increases property value over a DIY "gray market" installation. Prospective buyers in the Philippines increasingly ask about solar compliance status — an illegal installation can become a discloseable defect during property sale.

10. Sources and Official Links

ERC Advisory No. 2025-09-22 (Full Text)

Meralco Net Metering Application Forms & Guidelines

Republic Act 9513 — Renewable Energy Act of 2008

DOE Renewable Energy Portal — Solar PV Guidelines

Solar Install PH — Net Metering Credits Explained

Solar Install PH — Meralco Net Metering Guide

Solar Install PH — Zero Export Overview

Solar Install PH — Skipping LGU Permits Warning

Solar Install PH — ERC Net Metering Explainer

11. Frequently Asked Questions

Do I really need a PEE to sign my solar plans?

Yes. Under Republic Act 9513 and its implementing rules, all grid-connected renewable energy systems must have electrical plans signed by a Professional Electrical Engineer (PEE) registered with the Philippine Professional Regulation Commission (PRC). This is non-negotiable and required for both the DU application and the ERC COC.

Can I apply for net metering with a purely on-grid system (no battery)?

Yes. Net metering is designed for grid-tied systems with or without batteries. However, a hybrid inverter (grid-tied with battery backup) gives you the flexibility of Zero Export mode during the application waiting period, and resilience during outages. A purely on-grid system must shut down during brownouts.

What happens if my transformer's hosting capacity is full?

If the Distribution Utility's DIS shows that your local transformer has reached its hosting capacity limit (e.g., too many solar homes already connected), you have three options: (1) reduce your system size to fit within remaining capacity, (2) pay for a transformer upgrade at your own cost, or (3) wait until capacity opens up. The ERC's 2025 advisory now requires DUs to publish hosting capacity maps so you can check before designing your system.

How is the Blended Generation Rate (export credit) calculated?

The Blended Generation Rate is the weighted average of the utility's generation costs across all power plants in their mix — typically coal, natural gas, and renewables. Meralco's BGR for 2025-2026 is approximately PhP 6.50/kWh. This rate changes quarterly and is approved by the ERC. The Retail Rate (what you pay when you buy) is approximately PhP 12/kWh — roughly double the BGR.

How long does the ERC COC take to process?

As of the September 2025 ERC advisory, the target processing time for COC applications with complete documentation is 15 business days. Incomplete submissions restart the review clock. The COC is valid for the lifetime of the system but must be updated if the system capacity changes.

What is the difference between Net Metering and Net Billing?

In strict regulatory terms, "Net Metering" implies a 1:1 offset where 1 kWh exported offsets 1 kWh consumed. In the Philippines, the actual program is technically "Net Billing" — you are billed for the net difference between what you consumed and what you exported at different rates. The name "Net Metering" persists colloquially and in official program names, but the billing math is net billing, not 1:1 netting.

Can I use battery storage with net metering?

Yes. Batteries do not affect net metering eligibility. A hybrid inverter charges batteries from solar excess that would otherwise be exported. During the night, you draw from batteries instead of buying from the grid. During the day, if batteries are full and solar production exceeds your load, the excess exports for credits. Properly configured, a battery system maximizes both self-consumption and export potential.

What happens to my net metering credits if I move house?

Net metering is tied to the property and the meter, not the homeowner. If you sell your property, the new owner inherits the net metering agreement and its benefits — provided the system remains installed and compliant. An illegal (unpermitted) installation does not transfer and may complicate the property sale.