The flat-plate collectors reliably collect the incoming solar energy and convert it into usable heat. Particularly when using several collectors in an array, the cohesive overall image on the roof can become a design feature. Advanced absorber technology captures 95% of the available solar rays. The standard model SOL 27 basic has an impressive price/performance ratio. Weighing only 38.5 kg, the SOL 27 basic is as easy to install on pantiled, plain tiled, slate or shingle roofs as on flat roofs or a wall. Available in vertical and horizontal versions for optimum utilisation of the available roof area.