Back to list October 19, 2015 October Found It Spotlight: Talen Energy Photo Credit: Talen Energy Talen Energy is one of the largest competitive energy and power generation companies in the United States. Headquartered in Allentown, PA, Talen Energy’s power plants are located primarily in PJM (Mid-Atlantic) and ERCOT (Texas). Talen Energy (formerly PPL EnergyPlus) was established in June 2015. Talen Energy also sells the output of their power plants to commercial & industrial, small business and residential customers in Pennsylvania. To learn more on Talen Energy, click here.