Installed in the Cyclades, which has sun almost all year round. Very good performance, installed for 18 months now. I still have to see how durable it is over time.

One of the best purchases I have ever made. It was bought in July, but I waited for the first few days with clouds, rain, and low temperatures to write my comment. I don't even discuss it for the summer, plenty of hot water at any time of the day and with the one mirror, covered to avoid overheating and high pressure in the tank. Both mirrors have been working properly since early October. Now, with low temperatures and rain, it keeps hot water all day long (even with rain) and on the second day with clouds, two people can easily take a bath and wash the dishes. Even on the third day, it still has slightly warm water. It is very important to have proper installation and good insulation. Note that some local artists in my neighborhood were asking for 200-280 euros for labor without the top insulation materials. In the end, I did my job with 100 euros plus the materials from a very good craftsman, and the materials cost me 135 euros. (I got the best there is). Keep in mind that I installed it in a detached house, obviously in an apartment building, more money will be needed for materials, installation, and maybe it won't have such amazing performance. To avoid further exhaustion, there is no need to go to a more famous solar panel brand and pay much more since there is no difference. This one is excellent, and I say it based on knowledge since I have another one in another house, and the difference between them is huge in terms of hot water retention.

It was installed in May 2011 in front of the Lefkanti beach in Chalkida, it has been working perfectly until today, we have reached October 31, 2025, everything is ok,
in 2020 it only needed a change of resistances by my plumber, cost me about €30