WASHINGTON (AP) — A U.S. trade panel has ruled that low-cost solar panels imported from China and other countries have caused serious injury to American manufacturers, raising the possibility of the Trump administration imposing tariffs that could double the price of solar panels from aboard.

Friday's vote by the International Trade Commission was unanimous. The trade commission has until mid-November to recommend a remedy to President Donald Trump, with a final decision on tariffs expected in January.

White House spokeswoman Natalie Strom said Friday that Trump "will examine the facts and make a determination that reflects the best interests of the United States. The U.S. solar manufacturing sector contributes to our energy security and economic prosperity."

Georgia-based Suniva Inc., and Oregon-based SolarWorld Americas brought the case, saying a flood of imports have pushed them to the brink of extinction. Suniva declared bankruptcy, while SolarWorld had to lay off three-quarters of its workforce.

Cheap imports have led to a boom in the U.S. solar industry, where rooftop and other installations have surged tenfold since 2011.

The main trade group for the solar industry and many governors oppose tariffs, saying they could cause a sharp price hike that would lead to a drop in solar installations by more than 50 percent in two years.

Abigail Ross Hopper, president and CEO of the Solar Energy Industries Association, called the trade commission's 4-0 vote disappointing for nearly 9,000 U.S. solar companies and the 260,000 Americans they employ.

"Foreign-owned companies that brought business failures on themselves are attempting to exploit American trade laws to gain a bailout for their bad investments," Hopper said, warning that potential tariffs could double the price of solar, lowering U.S. demand and eroding billions of dollars in investment.

Suniva's U.S. operations are based in Georgia, but the company's majority owner is in China. SolarWorld Americas is a subsidiary of German solar giant SolarWorld, which declared insolvency last month.

Suniva hailed the ruling.

"It will be in President Trump's hands to decide whether America will continue to have the capability to manufacture this energy source," the company said in a statement. "President Trump can remedy this injury with relief that ensures U.S. energy dominance that includes a healthy U.S. solar ecosystem and prevents China and its proxies from owning the sun."

Trump has not cozied up to the solar industry, as he has for coal and other fossil fuels, but he is considered sympathetic to imposing tariffs on solar imports as part of his "America first" philosophy.

Governors of four solar-friendly states — Nevada, Colorado, Massachusetts and North Carolina — oppose the tariff, warning it could jeopardize the industry. They cited a study showing that a global tariff could cause solar installations to drop by more than 50 percent in two years, a crushing blow as states push for renewable energy that does not contribute to climate change.

"The requested tariff could inflict a devastating blow on our states' solar industries and lead to unprecedented job loss, at steep cost to our states' economies," the two Republicans and two Democrats wrote in a letter Thursday to the trade commission.

A group of former U.S. military officials also urged the Trump administration to reject solar tariffs, noting that the Defense Department is the nation's largest energy consumer and follows a federal law calling for the Pentagon to procure 25 percent of its energy from renewable sources by 2025.

Suniva called the case a matter of fairness. Even with better manufacturing methods, lower costs and "dramatically improved efficiency," the company has "suffered substantial losses due to global imports," Suniva said in its petition. The company declared bankruptcy this spring after laying off 190 employees and closing production sites in Georgia and Michigan.

SolarWorld Americas, meanwhile, has trimmed its workforce from 1,300 to 300, with more cuts likely.

"After nearly 30 factories have shut down in the wake of surging imports, the legacy of this pioneering American industry hangs in the balance," said Juergen Stein, CEO and president of SolarWorld Americas.

"We believe that the promise of solar - energy sustainability and independence - can be realized only with healthy American manufacturing to supply growing U.S. demand," Stein said in a statement to The Associated Press.

Suniva and SolarWorld have themselves to blame for their struggles — not pressure from overseas, Hopper said.

"Here is the real story of this case: We have two foreign-owned, poorly managed companies using U.S. trade laws to put U.S. manufacturers out of business and causing U.S. employees to lose their jobs," she said.

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