Solar Permit in Thailand — MEA/PEA Steps

Grid-tied solar (On-Grid/Hybrid) requires a proper utility permit. This guide covers the steps, documents, costs, and timeline in plain terms.

Where to File — MEA or PEA?

Bangkok, Nonthaburi, Samut Prakan file with MEA (Metropolitan Electricity Authority). All other provinces file with PEA (Provincial Electricity Authority). If the system exceeds 1kW and connects to the grid, a permit is required — for safety and legality.

Steps and Documents

Main steps: 1) Submit interconnection application + Single Line Diagram + equipment specs 2) Utility review + approval 3) Physical installation 4) Inspection + meter change (if exporting). Documents: ID copy, house registration, latest electricity bill, system diagram, and certified equipment specs.

Cost and Timeline

Fees are about 3,000-5,000 THB, taking 30-60 days depending on area and document completeness. Grid-export systems need a digital meter. QES Energy prepares documents and the Single Line Diagram for customers to reduce the hassle.

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Frequently Asked Questions

Can I install solar without a permit?

Off-Grid systems not connected to the utility don't need one, but grid-tied On-Grid/Hybrid systems require a permit for safety and legality.

How long does the solar permit take?

About 30-60 days depending on area (MEA/PEA) and document completeness.

How much does the solar permit cost?

Fees are about 3,000-5,000 THB, excluding meter-change costs if exporting to the grid.