The US renewables sector has sounded the alarm over an under-the-radar provision in the Senate’s tax-reform bill that industry groups say would annihilate investment into projects, and especially wind, by making renewables tax credits effectively worthless.

The American wind sector has had a laser-focus in recent weeks on protecting the production tax credit (PTC), whose multi-year phase down would be severely undercut by the House’s tax bill but is preserved in the Senate’s version.