Critics said the move would shortcut an investigation by the Commerce Department, which has been considering whether to impose the tariffs as part of a trade case against Chinese companies.
More than 300 solar projects in the United States have been canceled or delayed in recent weeks because of an investigation by the Commerce Department.
The renewable-energy business is expected to keep growing, though more slowly, in contrast to fossil fuel companies, which have been hammered by low oil and gas prices.
