The CEN Keymark certification scheme has been available for solar thermal products in Europe since 2003. This so-called "Solar Keymark" states conformity with the European Standards for solar thermal products. Solar Keymark is the key to the European market because: Products with Solar Keymark have access to all national subsidy schemes in EU member states In some Member States it is now obligatory that solar collectors show the Keymark label (e.g. Germany). People expect the Solar Keymark - most collectors sold now are Keymark certified. The three elements in the 3(rd) party Keymark certification are 1) Type testing according to European standards (test samples to be sampled by independent inspector) 2) Initial inspection of factory production control (quality management system at ISO 9001 level) Surveillance: Annual inspection of factory production control 3) Biannual "surveillance test": Detailed inspection of products.