Several Chinese solar companies with factories across the region could face steep new tariffs.

The proposed levies - targeting companies in Cambodia, Thailand, Malaysia and Vietnam - are in response to allegations of subsidies from China and the dumping of unfairly cheap products in the US market.

Some solar equipment exporters in Cambodia face the highest duties of 3,521% because of what was seen as a lack of cooperation with the Commerce Department investigation.

Products made in Malaysia by Chinese manufacturer Jinko Solar faced some of the lowest duties of just over 41%.

Another China-based firm, Trina Solar, faces tariffs of 375% for the products it makes in Thailand.