iSun, Inc., a solar energy company, provides design, development, engineering, procurement, installation, storage, and electric vehicle infrastructure services for residential, commercial, industrial, and utility customers in the United States. It also provides electrical contracting services; and data and communication services. The company was formerly known as The Peck Company Holdings, Inc. and changed its name to iSun, Inc. in January 2021. iSun, Inc. was founded in 1972 and is headquartered in Williston, Vermont.