Washington has set tariffs of up to 3,521% on solar imports from Southeast Asia, according to information published by the US Department of Commerce on Monday.
The hikes follow allegations that Chinese-owned manufacturers operating in the region had violated trade rules.
The tariffs target imports from Malaysia, Cambodia, Thailand, and Vietnam, countries that collectively supplied over $12.9 billion in solar equipment to the US last year, according to Bloomberg.
Known as antidumping and countervailing duties, the measures aim to counteract the impact of what the US Commerce Department deems to be unfair subsidies and pricing practices.