Wind and solar projects will have to meet more difficult work requirements to continue to access federal tax credits over the next four years, under guidance the Trump administration unveiled Friday.

Although renewable energy advocates said that the Treasury Department’s new guidelines amounted to an acceleration of the phaseout of federal support for wind and solar, there was widespread relief throughout the industry that the crackdown was not greater. Three of the four biggest gains on Wall Street for the day were posted by solar companies, led by Sunrun, the nation’s largest rooftop solar installer, with a 33 percent jump in price.

The new Treasury guidance came in response to an executive order Trump issued in the wake of the One Big Beautiful Bill Act that Congress passed six weeks

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