Service life: The service life of solar panels is determined by the materials of cells,solar panel tempered glass, EVA, TPT, etc. Generally,solar panel the service life of solar panels made by manufacturers who use better materials can reach 25 years, but with the impact of the environment , The materials of solar panels will age with time. Under normal circumstances,solar panel the power will be attenuated by 30% after 20 years,solar panel and by 70% after 25 years.
Test method: Since the output power of solar modules depends on factors such as solar irradiance and solar cell temperature,solar panel the measurement of solar modules is carried out under standard conditions (STC). The standard conditions are defined as: air quality AM1.5, light intensity 1000W/m2,solar panel temperature 25℃. Open circuit voltage: Use a 500W halogen tungsten lamp, 0~250V AC transformer, set the light intensity to 3.8~40,000 LUX,solar panel the distance between the lamp and the test platform is about 15-20CM, and the direct test value is the open circuit voltage;
Under this condition,solar panel the maximum power output by the solar cell module is called the peak power. In many cases,solar panel the peak power of the module is usually measured with a solar simulator. The main factors affecting the output performance of solar cell modules are as follows: load impedance, sunlight intensity,solar panel temperature, and shadow.