Green Circle Decarbonize Technology Limited, through its subsidiary, designs, develops, and manufactures energy-saving solutions. The company specializes in phase change material (PCM) thermal energy storage (TES) technology. Its offerings include thermal energy storage for heating, cooling, and power generation; PCM for temporary storage of excess thermal energy in heating, ventilation, air conditioning, and refrigeration applications; and the BocaPCM-TES Panel, a high-density polyethylene plastic encapsulated container for HVAC and refrigeration use. It also provides BocaPCM-TES tanks and systems and automatic control systems. Founded in 1992, the company is based in Kwun Tong, Hong Kong, and operates as a subsidiary of Joyful Star Limited.