Virginia regulators have approved a request from Dominion Virginia Power to lower what it charges customers.
The State Corporation Commission says the move will trim the average monthly bill for a residential customer by $3.70 starting Dec. 1.
Spokesperson Chuck Penn says power is costing less than Dominion originally projected in the summer due to mild temperatures and more sustainable energy sources.
"We have appealed to the SCC recognizing that our projects are going to fall short of what we thought they were," Penn says.
By law, utilities like Dominion can't charge customers more than they pay for natural gas, coal, uranium and biomass used to generate electricity and power.
Richmond-based Dominion is the state's largest utility with about 2.3 million customers.