QTC Energy Public Company Limited manufactures and sells electric transformers in Thailand and internationally. The company offers hermetically sealed oil type distribution, on load tap changer, amorphous metal distribution, dry type class F and H, pad mounted, earthing, CSP-type, gas sealed, DE bus duct, dry type cast resin, and power transformers, as well as open type transformers with conservators. It also provides various services, such as scheduled checks and maintenance, transformer repairs and maintenance, transformer oil fill, transformer rental services, etc. 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 name, 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 based in Bangkok, Thailand.