Why no large family rooftop solar power generation using light size

Double glass components has many advantages, but always no large-scale used in photovoltaic power station, an important reason is that both before and after its use is lit EVA film, has led to the large loss of power. Because there is no back reflection of white cell between light-leaking return

double glass module has many advantages, but they have not used light volt power station on a large scale. One of the important reason is that they are in EVA film before and after the application is brightly lit, caused a lot of power loss. Because there is no white back between panels light-leaking reflected back to the module, so at least 2% of the power module. Double deck glass components now there are two types of equipment: sealing side and the sealing side. Use seal plan to create components is an important reason of vapor erosion of the EVA film, as if it only need about 0. The depth of 5 to 1 cm. The actual 1000 to 3000 hours of damp heat ageing seemed to confirm this claim. However, ethylene vinyl acetate membrane water vapor transmittance up to 20 - 30g/m2。 The implementation of this design still can make a big risk. A more reasonable scheme is around the double deck glass components installed butyl tape, to isolate EVA film with moisture and oxygen. Double deck glass component is another problem to admit how much air pressure will affect it. Due to lost all around the shape effect of aluminum frame, double deck glass can prevent wind pressure under the action of wind pressure on component damage, also need some data to support. Because of double deck glass module saves the use of aluminum frame, save the cost of making the whole module on the premise of cost reduction set aside space for 0 + use high quality EVA film, butyl tape and connection box. This makes double deck glass modules may use life span of 30 years, 40 years, and even 50 years of modules. At present, because of the influence of the technology, the application of the double glass module scope is limited, because the glass itself is a kind of common building materials, the application of the double glass module natural for double glass photovoltaic modules prepared for large-scale application in the future construction.