On December 27, 2024, the Thai Cabinet relaxed regulations on solar rooftop installations with the introduction of the Ministerial Regulation Re: Designation of Type, Kind, and Size of Factories (No. 3), B.E. 2567 (2024) (the “Ministerial Regulation”). The Ministerial Regulation does away with the need to obtain a factory license (commonly known as a Ror. Ngor. 4) from the Energy Regulatory Commission (ERC) or Department of Industrial Works (DIW)[1] for all solar rooftop power generation installations located outside of industrial estates, irrespective of their production capacity. This relaxation came into effect on December 28, 2024.