NSTAR Electric Company (NSTAR Electric), doing business as Eversource Energy is an electric utility. The Company serves resid ... ential, commercial and industrial customers in parts of Massachusetts. NSTAR Electric is a subsidiary of Eversource Energy. Eversource Energy operates in three segments: electric distribution, electric transmission and natural gas distribution. Eversource Energy is engaged in the energy delivery business through its utility subsidiaries, which include The Connecticut Light and Power Company, an electric utility that serves residential, commercial and industrial customers in parts of Connecticut; Public Service Company of New Hampshire, an electric utility that serves residential, commercial and industrial customers in parts of New Hampshire and owns generation assets, and Western Massachusetts Electric Company, an electric utility that serves residential, commercial and industrial customers in parts of western Massachusetts and owns solar generating assets. read more