A claimed breach in a solar wafer supply deal has led to Schott Solar Wafer suing Suntech Power Holdings to the tune of €13.6 million (USD $18 million).

In June 2008, Wacker Schott Solar signed a long term silicon wafer supply agreement with Suntech that specified the supply of 220MW of multicrystalline wafers per annum to Suntech. Only a year later, Wacker withdrew from the wafer making joint venture with Schott.

In a SEC filing, Suntech said it was evaluating the claim which had been submitted to the Frankfurt District Court, Germany around December 13, 2012 and said it would defend the action.