How Solar Installation Works in Philippines
Solar panel installation in the Philippines is a multi-step process that combines technical work with a series of legal and regulatory requirements. While the physical installation is typically a quick process, the entire journey, especially with regard to permitting and grid connection, can take several months.
Here's a breakdown of how it works:
Step 1: Assessment and System Design
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Energy Audit
The process begins with a solar provider evaluating your home’s energy needs. They will analyze your past electricity bills to determine your average monthly consumption. This will dictate the size of the solar system that suits the property. -
Site Survey
An engineer or a technician will visit your property to inspect the roof. They will check its structural integrity, material, and orientation to the sun. The ideal roof for solar panels in the Philippines is one that is south-facing to receive maximum sunlight throughout the day. They will also look for any shading from nearby trees or buildings that could affect the panels’ efficiency. -
System Proposal
Based on the assessment, the installer will create a customized proposal. This includes the recommended system size (measured in kilowatt-peak or kWp), the type of panels and inverter, the expected savings, and the total cost.
Step 2: Permit and Documentation
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Local Government Unit (LGU) Permits
You’ll need to secure an Electrical Permit and sometimes a Building Permit from your city or municipality. The specific requirements can vary by LGU but generally include electrical plans signed by a Professional Electrical Engineer (PEE), proof of ownership, and a barangay clearance. -
Net-Metering Application
If you want to connect your system to the grid and earn credits for your excess energy, you’ll need to apply for the Net-Metering Program with your Distribution Utility (Usually Merlaco). This involves submitting an application form, a Certificate of Compliance (COC) for your equipment, and other technical documentation. The DU will conduct a “Distribution Impact Study” to ensure your system won’t negatively affect the grid.
Step 3: Installation
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Mounting System
A racking system is securely fastened to your roof. This mounting structure is designed to withstand local weather conditions, including strong winds and typhoons. -
Panel Installation
The solar panels are then attached to the mounting system. The panels are connected in “strings” to an inverter. -
Inverter and Electrical Wiring
his major component converts the direct current (DC) electricity generated by the panels into alternating current (AC) electricity, which is what your home appliances use. The system is then wired to your main electrical panel.
Step 4: Final Inspection and System Connection
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Final Inspection
The LGU will conduct a final inspection to ensure the installation complies with all electrical codes and safety standards. -
Bi-directional Meter
If you’re enrolled in the Net-Metering program, your utility provider will replace your existing electricity meter with a special bi-directional meter. This meter measures both the electricity you consume from the grid and the excess electricity your solar panels export back to it. -
Commissioning
After the new meter is installed and all systems are checked, your solar power system is “commissioned” and can be officially turned on.
