NASHVILLE, Tenn. (AP) -- The state of Tennessee is adding a second car model to its electric vehicle rebate program, which so far has drawn fewer participants than expected.

WSMV-TV reported Wednesday that the state will soon begin offering $2,500 rebates to owners of the Chevrolet Volt, an electric hybrid car.

The rebate program in Tennessee is now only open to people who buy the all-electric Nissan LEAF.

Car owners who chose to participate in the program must agree to allow data about how they use and charge their vehicles to be collected for a government-funded study. The information is being gathered by the California-based ECOtality. The company received a $99 million stimulus grant from the U.S. Department of Energy.

The state added $2.5 million in matching grant money for the rebates.