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Solfex supply evacuated tube solar hot water panels. The Evacuated Tube Solar Collector Panels are available to trade & DIY.Solfex offers a range of first class engineered evacuated tube & flat plate solar panels along with the most modern controls available, and, at a fraction of the price major solar & heating manufactures are marketing their products at.One of our large evacuated tube collectors is enough to provide 300litre of hot water.Flat plate panels are more appealing to the eye when installed on the roof especially the inbuilt roof system type, but this type suffer from high heat losses during overcast or windy weather conditions and the heat loss can exceed the heat gain, in other words turning your flat solar evacuated tube collector into a large radiator on your roof.