News & Promotion

PEA publishes its 2026 grid requirements

The Provincial Electricity Authority (PEA) has published its 2026 Grid Code and related grid-connection requirements. PEA’s official page was updated on 16 September 2026 and states that the new requirements take effect on 10 December 2026. For homeowners planning a solar rooftop, the decision therefore involves more than array capacity or payback: the connection route, equipment and protection design must be checked against the requirements applicable to the actual project.

PEA has also advised the public to verify the quality and standards of PV modules, inverters, electrical protection and installation work to reduce risk, improve performance and support a longer service life.

Seven checks before installing a home solar rooftop

1. System and connection route: clarify whether the system is for self-consumption without export or for an eligible power-purchase programme. Procedures and documents can differ.
2. Actual daytime load: size the system using the home’s consumption profile, not roof area or a sales claim alone.
3. Equipment standards: verify documentation for modules, inverters, isolators, cables and protection devices against applicable criteria.
4. Roof structure: have an engineer review loads, existing condition, fixing points, wind effects and waterproofing risk, especially for retrofit projects.
5. Electrical protection: coordinate isolation, earthing, overcurrent and surge protection, labelling and safe equipment access.
6. Waterproofing and maintenance: detail mounts, drainage, panel clearance and safe technician access so the system does not obstruct future roof inspection.
7. Handover records: retain installation and electrical drawings, equipment schedules, test results, warranties and emergency shutdown instructions.

For a new home, coordinate the roof and electrical design from day one

Reserving the array area, checking orientation and shading, locating the inverter, routing cables, coordinating the main board and planning maintenance access early can reduce redesign and waterproofing risk. These are Greenery Design & Construction design recommendations; they are not universal project approvals issued by PEA.

A useful sequence is to reduce demand first, then size solar. Shading, an appropriate roof and wall envelope, controlled daylight and efficient appliances may reduce the PV capacity needed compared with a house that relies on air-conditioning to solve every heat-gain problem.

Important note

Requirements may vary with system type, service area, generation capacity, connection point and application date. Owners and designers should use the latest PEA documents and have qualified professionals review the project. This news summary is a planning aid, not a connection approval or engineering certification.

Read next: A Breathing House in Chiang Mai: Integrating Airflow, Shading, Solar and Sustainable Materials

Sources

• PEA: Grid regulations and requirements (updated 16 September 2026; accessed 23 September 2026)
• PEA: Check standards before installing Solar Rooftop (22 May 2026; accessed 23 September 2026)
• PEA: Grid-connection service (accessed 23 September 2026)

Comments on roof structure, waterproofing, equipment layout and demand reduction are Greenery Design & Construction’s analytical guidance. Project outcomes must be verified through the actual design, engineers, installer and relevant authorities.