The Retail Electricity Suppliers Association (RESA) is a non-profit, non-governmental organization that caters to the needs of suppliers, end users, and other players in the Philippine power industry. RESA establishes a venue for discussion for matters pertaining to the implementation of the Retail Competition and Open Access in the Philippines. RESA currently has nineteen (19) active member companies.

RESA was formally incorporated on January 15, 2010. The founding members of the organization were Aboitiz Energy Solutions, Inc., Masinloc Power Partners Co. Ltd., Cabanatuan Electric Corporation, GNPower Ltd. Co., Premier Energy Resources Corp., Team Philippines Energy Corp., Trans-Asia Oil and Energy Development Corp., Adventenergy, Inc., and First Gen Energy Solutions.

RESA aims to be a prime mover in setting high industry standards for service and facilities for retail electricity customers through providing a forum for discussion with members and relevant government institutions for the better implementation of Retail Competition and Open Access in the Philippines.