Your electric service has two components:
The electricity supplied by National Grid is known as Basic Service.
In the past, only your electric utility could provide your electricity supply. But now, under MA state law, consumers can choose a supplier other than their utility. In this case, the utility would continue to deliver the electricity, maintain poles and wires, and provide other customer services; and customers would continue to receive a single electric bill from their utility.
Today, most residents and businesses subscribe to their utility's Basic Service. Community Choice Aggregation is a state program that permits a town to choose, on behalf of its residents and businesses, a supplier other than the utility. At CCA inception, Basic Service subscribers who do not opt out are automatically enrolled with the new supplier, with the ability to leave without penalty at any time.