As of 31 December 2021, the Company had eight commercially operating power plants with a total of 440 MW of installed power generation capacity, deviding into 3 groups. First, waste-fired power plants with an installed power generation capacity of 180 MW, sold power to the Electricity Generating Authority of Thailand (“EGAT”) under Power Purchsing Agreement (“PPA”) of 163 MW. Second, waste heat revovery power plants with an installed power generation capacity of 40 MW, sold power to TPI Polene Public Company Limited (“TPIPL”), which is the parent company and is a leader in cement manufacturing and distribution business and plastic pellets of the country, under Power Purchsing Agreement (“PPA”) of 40 MW. Third, coal-fired power plants with an installed power generation capacity of 220 MW, sold power to TPIPL under Power Purchsing Agreement (“PPA”) of 190 MW. All of the Company's power plants are located in the same vicinity as TPIPL’s cement production plants in Kangkhoy, Saraburi Province in Thailand