cost of residential electricity in connecticut
1 Residential electricity rates in CT. 2  Residential electricity rates in Connecticut average 17.34Â¢/kWh, which ranks the state 4th in the nation.  The average residential electricity rate of 17.34Â¢/kWh in CT is 45.96% greater than the national average residential rate of 11.88Â¢/kWh.