NSTAR Electric Company, a regulated electric utility company, engages in the purchase, transmission, delivery, and sale of electricity to residential, commercial, and industrial customers in eastern and western Massachusetts. NSTAR Electric Company was formerly known as Boston Edison Company and changed its name to NSTAR Electric Company on January 2, 2007. The company was incorporated in 1886 and is based in Boston, Massachusetts. NSTAR Electric Company operates as a subsidiary of Eversource Energy.