PV Crystalox Solar, the solar panel silicon wafer maker, said trading in the last six weeks of 2009 was in line with management expectations.Wafer shipments for the whole of 2009 were marginally above the guidance of 230-235 megawatts indicated in the November trading update, reflecting the impact of incentive programmes in certain core markets.Prices remained under pressure, however, the company noted, as the market remains oversupplied.The board said the company remains well placed to benefit from any sustained improvement in the photovoltaic market.