The White House announced Monday that the moves are being implemented using executive actions and presidential proclamations. They follow months of complaints by industry groups, which argue that the solar sector is being slowed by supply chain problems due to an ongoing Commerce Department inquiry into possible trade violations involving Chinese products.

The Commerce Department announced in March that it was scrutinizing imports of solar panels from Thailand, Vietnam, Malaysia and Cambodia, concerned that products from those countries are skirting U.S. anti-dumping rules that limit imports from China.

White House officials said Biden’s actions aim to increase domestic production of solar panel parts, building installation materials, high-efficiency heat pumps and other components like cells used for clean-energy generated fuels. They called the tariff suspension affecting imports from Thailand, Vietnam, Malaysia and Cambodia a bridge measure while other efforts increase domestic solar power production—even as the administration remains supportive of U.S. trade laws and the Commerce Department investigation.

Solar energy companies gained ground in morning trading Monday on Wall Street following reports that the U.S. was moving to ease solar tariffs.

The Commerce Department has defended its investigation. Secretary Gina Raimondo told a Senate panel in May that the solar inquiry is following a process set by law that doesn’t allow consideration of climate change, supply chains or other factors.

Still, clean energy leaders have been warning since then that the investigation—which could result in retroactive tariffs of up to 240%—would severely hinder the U.S. solar industry, leading to thousands of layoffs and imperiling up to 80% of planned solar projects around the country. That could jeopardize one of Biden’s top clean energy goals and run counter to his Democratic administration’s push for renewable energy such as wind and solar power.

“The president’s announcement will rejuvenate the construction and domestic manufacturing of solar power by restoring predictability and business certainty that the Department of Commerce’s flawed inquiry has disrupted,” Heather Zichal, CEO of the American Clean Power Association and a former Obama administration official, said in a statement Monday.

Others struck similar tones. Abigail Ross Hopper, president and CEO of the Solar Energy Industries Association, cheered Biden’s “thoughtful approach to addressing the current crisis of the paralyzed solar supply chain.”

“Today’s actions protect existing solar jobs, will lead to increased employment in the solar industry and foster a robust solar manufacturing base here at home,” Ross Hopper said in a statement.

Using executive actions comes as the Biden administration’s clean energy tax cuts, and other major proposals meant to encourage domestic green energy production, have stalled in Congress.

The Defense Production Act lets the federal government direct manufacturing production for national defense and has become a tool used more commonly by presidents in recent months. President Donald Trump’s administration used it to produce medical equipment and supplies during the early stages of the coronavirus pandemic. Biden evoked its authority last month to prioritize boosting the nation’s supplies of baby formula amid a domestic shortage caused by the safety-related closure of the country’s largest formula factory.

Jean Su, director of the Center for Biological Diversity’s energy justice program, said in a statement that Biden’s announcement can “give critical momentum to the needed transition to solar energy.”

“We hope this use of the Defense Production Act is a turning point for the president, who must use all his executive powers to confront the climate emergency head on,” Su said.