Hartford, CT residents, and businesses have been able to shop and compare their electricity supply rate since 1998. Historically, Hartford, CT, along with the rest of Connecticut, have had higher electricity rates than the national average. Most of Hartford is served by the utility Eversource Energy which was formally Connecticut Power & Lights but was rebranded in February of 2015. The energy rates in Hartford are around 25% less than the rest of CT. For more information on Hartford energy usage, rates and sources, see the information below.