Since the foundation of GP Solar exists a successful partnership between GP Solar and centrotherm photovoltaics AG. Since 2008 GP Solar is an effective member of the centrotherm photovoltaics group. So the competence untis Consulting, Cell Technology and Inspect complement the activities of centrotherm photovoltaics AG.

centrotherm photovoltaics AG, headquartered in Blaubeuren, is one of the world's leading technology and equipment providers for the manufacturing of solar silicon, crystalline solar cells and CIGS thin film modules. The broad product spectrum comprises key equipment and turnkey production lines for crystalline and thin-film solar cells. The product range is supplemented by reactors and converters for the manufacturing of solar silicon. centrotherm photovoltaics guarantees its customers important performance parameters such as production capacity, degree of efficacy, and completion deadlines for turnkey lines. The Group employs around 1,100 staff members, and operates in Europe, Asia and the USA. centrotherm photovoltaics achieved revenue in the 2008 financial year of EUR 375 million, EBIT of EUR 56 million*, and is listed in the TecDax of the Frankfurt Securities Exchange.

_{(*before purchase price allocations)}