State of the art solar hot water systems
Solar thermal technology for heating water has over 50 years of practical application and it's now a tried, tested and reliable process. Recent advancements in the technology include developments in the thermal collection process such as the collector design and the absorber coatings that are employed.
The evacuated tube thermal collector is a more recent development than the conventional and more common flat plate collector. They have become more and more popular, particularly since the reduction in their supply costs, their high performance and reliability in cold climates and commercial applications, and of course their attractive appearance.