Water heating solar system This spring we decided to buy a water heating solar system. The main reason why we did that is it helps us to save up. Our bills for electricity and gas often are very big, we don't use electrisity or gas a lot, and always try to save up them, but prices for them are expencive. So we were looking for an alternative way to heat water, and as I said we bought the water heating solar system. I am so satisfied now, cause it's so cool to have warm and even hot water in any time when you need it. Water is warm even when it's cold outside, but sunny. I think it because it works like a thermos. There is a big thermos with water on the top and ten black vacuum tubes below. I don't know how to describe this better. My husband instaled it on the roof, and the system works!