Wind and solar companies were already bracing for Congress to end federal subsidies. But the Senate bill goes even further and penalizes those industries.

Senate Republicans revealed a new tax for solar and wind energy this weekend, in the latest version of a bill that could be passed as early as Monday afternoon.

Tucked inside Republicans' massive domestic policy bill is an excise tax for wind and solar projects, a provision that came as a surprise not just to the renewable energy industry, but to numerous senators who are crafting the legislation.