Independent institutes have confirmed the quality of our products time and again. Competitive testing by Stiftung Warentest, Germany’s most prominent consumer testing agency, have repeatedly certified outstanding results for Wagner solar installations:
In test "Stiftung Warentest" 3/2008 our TOPline BW 480plus solar package came out as test winner and system with best value for money in the domestic hot water category. Rating: "excellent". Tested systems: 12 solar systems: 2 excellent, 8 good, 2 satisfactory.
In the 09/2010 comparative test by the Ökotest organization, which focuses on green products, the on-roof BW 720 AR solar package scored “excellent” for the highest solar yield and was the best system in the test with the highest fossil fuel savings. Tested systems: 17 solar systems: 1 excellent, 13 good, 3 satisfactury.
In the 10/2010 Ökotest competition the SH 1440 AR solar heating package also rated “excellent”. It achieved the highest yield and with its still reasonable price was one of the most economical tested. Tested: 17 solar systems
for solar collectors:" ...because of low pollutant content and high efficiency".
European quality mark Solar Keymark. Tested according to:
These for example include testing of:
Additionally manufacturing quality management is implemented according to EN ISO 9000.
Supervised quality management
*The "Blue Angel" was the world's first ECO label