U.S. Senate Democrats are trying to include a suite of tax breaks for renewable energy in a payroll tax-cut bill that Congress is considering.

They are proposing to continue a program that lets companies claim grants instead of tax credits, continue the main tax credit for wind energy production and revive a program that provided tax credits to manufacturers.

“I don’t think that’s final at this point,” Senator Kent Conrad, a North Dakota Democrat, said in a brief interview today. “That’s what we’re pushing for.”

Senate Majority Leader Harry Reid hasn’t released details of a new proposal to extend the payroll tax cut and expanded unemployment insurance before year’s end. The tax bill is one of the final items Congress will debate before leaving Washington for the year. The payroll tax cut and expanded jobless benefits expire Dec. 31.