U.S. President Donald Trump slapped tariffs on imported solar panels and washing machines, angering trade partners as he took his first major protectionist move a year into his term.

The United States will impose new duties of as much as 30 percent on foreign-made solar equipment, the U.S. Trade Representative's office said Monday.

Trump also approved tariffs starting as high as 50 percent on imported washing machines. China and South Korea condemned the steps, with the Ministry of Commerce in Beijing calling them a "misuse" of trade measures.