Due to prolonged use of solar energy and poor water quality, the inner layer of the vacuum tubes scales up, reducing their water absorption rate. In this case, simply cleaning the vacuum tubes will resolve the issue.

2. Due to the prolonged lack of rain, the environment surrounding Dongguan solar water heaters is excessively dusty, caused by activities such as road repairs and construction fumes, which results in a thick layer of dust on the surface of the vacuum tubes, blocking sunlight and reducing absorption rates. Solution: Clean the dust from the surface of the vacuum tubes.

3. Some solar water heaters have insufficient water temperatures due to improper installation directions or obstructions by buildings blocking sunlight. Additionally, non-standard solar water heaters with a center hole shorter than the national standard (80mm) also have smaller water tanks, resulting in less storage capacity and naturally higher temperatures.