Flat Plate Collectors offer a reliable supply of solar hot water for residential and commercial applications where evacuated tubes may not be suitable The Greentek flat plate solar thermal collector is suitable for residential or commercial solar water heating projects. The collector features a low profile (75mm 3" profile) design, which combined with ultra-lightweight melamine foam insulation, makes it one of the lightest flat plate panels per m2 on the market. The TINOX Energy Aluminium absorber sheet absorbs up to 95% of available sunlight converting into usable heat.