QTC Energy Public Company Limited, together with its subsidiaries, engages in the manufacture, sale, and distribution of electric transformers in Thailand and internationally. It also provides various services, such as scheduled check and maintenance, transformer repair and maintenance, transformer oil fill, transformer rental services, etc.; and involved in the import and distribution of product and equipment relating to the solar cells. In addition, the company invests in the renewable energy business; and produces and distributes electricity from solar energy. It offers its products under the QTC trademark, as well as under customer specific brands. The company was formerly known as QTC Transformers Co., Ltd. and changed its name to QTC Energy Public Company Limited in August 2010. QTC Energy Public Company Limited was founded in 1996 and is headquartered in Bangkok, Thailand.