Suntech – the world’s biggest PV module-maker – made an accounting provision of $19.2m in its latest results to reflect the possible effect of preliminary anti-dumping tariffs on China-made cells announced by the US government last week, plus countervailing duties unveiled in March.

The provision, equivalent to 4.7% of revenues, hit the company’s gross profit margin in the January-March quarter, which fell to 0.6%,