Covers all provinces outside Bangkok — including Chonburi, Rayong, Pattaya, and the rest of Thailand. Most NCA Solar installations fall under PEA jurisdiction.

Covers Bangkok and the surrounding metropolitan area (Nonthaburi, Samut Prakan).

Registration is not yet enforced as an obligation on private owners, but the direction is unmistakable. PEA and MEA encourage every system they encounter to register. Doing it now means you are in order from day one, instead of assembling documentation under time pressure once the rules tighten.

PEA/MEA inspection verifies that your inverter has proper anti-islanding protection. Without it, your system can energize the grid during a blackout — creating lethal conditions for utility line workers.

Property insurers assess whether electrical work was carried out to standard. An installation that has never been inspected is considerably harder to defend after a fire or storm damage. A completed PEA/MEA inspection is independent documentation that the work met the requirements.

Thailand's residential buyback programme lets registered owners sell surplus power to the grid. Registration is the prerequisite - without it, every kilowatt-hour you export goes to PEA/MEA unpaid.

Inverter and panel warranties generally assume installation in accordance with local rules. A documented and inspected installation makes a warranty claim over a 10 to 25 year period considerably easier to pursue.