Solar thermal panels: flat plate or evacuated tube?
Posted by Gabriel Wondrausch on 8 October 2010 at 9:08 am
Which type of solar water heating system works best. Watch this video to weigh up the pros and cons of flat panel versus evacuated tubes.
The main difference comes down to the efficiency. With evacuated tubes, the vacuum provides almost perfect insulation. A flat plate panel has insulation at the back and sides, with glass on top, and isn't so efficient per square metre. Flat plate panels are generally slightly cheaper.
During the summer months, there's very little difference in performance between the two. In winter, when we have cold days, and lower light levels, the evacuated tubes will perform slightly better.
We install both systems. They suit different people. The argument often come down to aesthetics versus efficiency. A lot of people prefer the look of the flat plate panels, but if you want the more efficient, then it's evacuated tubes.
If you have a question about anything in the above blog, please ask it in the comments section below.
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