In a word, yes. But there are limitations.
A customer who leaves the Cape Light Compact power supply program and goes to NSTAR’s default service or to another competitive supplier, may return to the Compact’s supply at a later date, but acceptance of the customer back into the Compact’s power supply program is at the discretion of the Compact’s supplier.
Here’s why.
When a supplier contracts for its energy supply, it does so for a specific amount of load (kWh usage) which it anticipates it will be serving. When customers leave and go to NSTAR’s default service or to another competitive supplier, their usage and the usage of other customers who have left no longer need to be served by the supplier.
This puts the supplier in the position of having excess energy. Because of risks associated with having excess energy, the supplier will sell this excess energy into the marketplace. When customers return, the supplier no longer has the energy on hand to serve the kWh usage the customers require. The supplier then needs to decide whether or not they will enter the marketplace to purchase the energy necessary to serve these customers.
Also, note that prices for energy in the marketplace at the time the customer returns could be higher or lower than the contract rate currently in effect for the existing customers.