ROANOKE, Va. (AP) - Appalachian Power is offering a discount to electric car owners who charge their vehicles during lower demand hours.

The Roanoke Times reports the deal is part of a pilot program recently approved by the State Corporation Commission.

The company said in a news release that residential customers with a typical electric car consumption of 2,700 kilowatt-hours a year will save about $86.50 on home charging when they plug in during off-peak hours. That’s an annual discount of about a third.

There are about 700 plug-in electric cars registered in Appalachian’s Virginia service area.

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