Barilla solar have set-up an experiment comparing an FP and an ET system, along with outside temp, tank top and bottom temps and insolation. All nicely presented here:
http://www.barillasolar.co.uk/livefeed.aspxYou can look back trhough previous days and it's interesting to see how the systems are mostly very similar but sometimes diverge significantly (on dingier, colder days, not very surprisingly). Nice bit of work. The only thing is it's not at all clear which system is which and who's panels have been installed. Searching for Hyperion and Titan both find solar companies, but not obvioulsy ones that supply solar thermal panels. I think that Titan is the flat panel.
