The investment aims to produce 8,000 megawatts in the next 10 years, starting from this year, of which 3,000MW will be achieved in the first five years.
He added that the company was still looking for a merger and acquisition deal in the renewable energy business in foreign countries.
The company recently outlined strategies to boost its growth under a five-year investment plan from 2020-24. The strategies include seeking investment opportunities for power projects with the PTT Group.