Connecticut allows retail choice for Eversource and United Illuminating customers. The state Office of Consumer Counsel publishes a comparison rate board, but warns that most customers don't save and many overpay due to teaser-then-variable pricing. Stay on standard service unless you find a clearly fixed, fee-free plan that beats it.
Look up Eversource or UI's current standard service rate (resets Jan 1 and Jul 1).
Use the EnergizeCT rate board.
Only consider fixed-term, fixed-rate plans with no monthly or cancellation fees.
Re-shop every 6 months when the standard rate resets.
When you switch suppliers, your delivery utility doesn't change — they still maintain the wires and respond to outages. Only the energy charge on your bill changes.