
Solar Rooftop Factory Permits Thailand 2026
The latest guide to permitting a factory rooftop solar system in Thailand. After the 2024 ministerial regulation removed the RG.4 factory license, three steps remain: ERC license exemption (1,000 kVA threshold), building modification permit (160 sq.m threshold), and PEA/MEA grid interconnection under zero-export — with real documents and timeline.












