The RESOL product range includes a range of high-class solar thermal and heating controllers as well as a broad variety of accessories for the efficient use of energy. All RESOL products are future-oriented, sophisticated and unique in their design. Resold controller have been used by a number of solar hot water manufactures. In the past the RESOL Deltasol B can be found in Dux, Conergy, Environson and stretch solar hot water systems. The newer version the Delasol BS/4 controller is currently in by Apricus and Thermann solar hot water systems.