Tomblin's original bill would have kept a tax credit only for cars that run on natural gas, propane or butane.
The bill the committee advanced on Friday keeps the tax credit for those fuels but also for solar, electric, hydrogen and liquid coal-fueled vehicles.
The tax credit is worth 35 percent of a vehicle's price, up to $7,500.
Tomblin and the committee proposed eliminating the tax credits in 2017, four years sooner than under current law.
There are also tax credits for alternative fuel refueling stations and infrastructure. A proposal to include a tax credit for solar electricity refueling stations was shot down by the committee.