1. Vacuum tube: 1. The quality of the vacuum tube requires the vacuum tube coating technology, suction density and film layer raw materials. there is no sunshine on cloudy and rainy days, and there is an obstruction in front of the vacuum tube, and another reason is that after long use, there will be scale on the inner wall of the vacuum tube. empty. vacuum tube, which can also affect the heat absorption efficiency of the vacuum tube).
2. Water tank: insulation effect. The thickness of the south and north solar water tanks is different, and their insulation effects are also different. Water tank foaming technology, density of the insulating layer and material used for polyurethane. If manufacturers do not have the strength to produce solar energy, they generally cannot do it in terms of production technology and technological content.
3. Support: The quality ofThe support does not comply with standards, its wind resistance is poor and it is not solid.