Solar panels, what is the common problem?

(1) a hot spot problem. Caused in the process of using solar street lamps, panel will inevitably fall on some of the dust, leaves and other debris, caused the partial shadow on the panels, some of these local shadow will cause panel board the current in the battery monolithic

( 1) A hot problem. The reason in the process of using solar energy street light, dust, leaves and other debris would inevitably fall on the panels, causes the partial shadow on the panel. These local shadow monomer some panels will lead to the plate current and voltage changes, causing the consequences of local temperature rise, after a long period of time will appear some obvious burning hot. B。 Results when there is a certain degree of solar panels on the hot effect, can melt panel component of solder joints, destroy the grid lines, slowly damage the panel component, will not only seriously affect the lighting system, will also reduce the service life of the panel component at least 10%. C。 How to avoid the early in the design of panels of battery series parallel diode, have good partial pressure effect, can effectively prevent solar photovoltaic panels hot effect; In addition, in the late stages of the installation, should pay attention to avoid install in a concealed place. There is no shelter. In addition, we should pay attention to regular cleaning the dust and other sundry. ( 2) A cracking problems. Crystalline silicon solar panels are made of the reasons. Due to the characteristics of its crystal structure, it is easy to crack. In essence, there are two reasons, one is mechanical stress, the other is a thermal stress. Initially, the panel will appear only a few small cracks the naked eye is hard to find. However, after a long period of time, they would develop into pieces, visible to the naked eye. B。 The result when hidden crack grid line thickening, collect current couldn't normal output, cell and even complete failure, the part had a great influence on the power output of solar street lamps, led to the incorrect attenuation, will affect its service life. At the same time, the panels of the implicit crack problems under the mechanical load increasing, this could also lead to damaged, open at the same time can also cause the hot effect. C。 How to avoid the panels in the process of production, transportation, installation and maintenance, must fully consider the characteristics of easy cracking, in order to avoid the impact of hard or extrusion, reduce the possibility of cracking. ( 3) A snail. Because solar panels usually has some black or white linear pattern, looks like a snail crawling traces on it. This is called snail. This is usually a battery components cracks, water through the resin back and packaging material penetration into the cracks. This water will react with battery electrode finger in silver, silver ion diffusion. At this point, the silver ions in the sun will react with other substances to generate silver oxide and sulfide silver, then we will see snails line along the crack formation, this is actually a photovoltaic (pv). B。 Results, in fact, the problem of the snail with cell rupture, so the result is the same. First of all, aesthetics has a great discount. Second, when the crack reaches 8% of the surface of the battery, it will have a obvious adverse effect on the panel itself, 12% of the surface area. Panels performance even linear decline, leading to panels of power attenuation and life.