With the change of climate, there are also many people who are curious about the so-called photovoltaic power generation. Is it possible to generate electricity only on sunny days? Wouldn't it not be able to generate electricity on rainy days?
First of all, we need to know what is photovoltaic power generation?
Photovoltaic, refers to the solar photovoltaic power generation system, is a kind of "photovoltaic effect" using semiconductor materials. When photons are irradiated on the surface of a metal or semiconductor, its energy can be completely absorbed by an electron in the metal or semiconductor, and the electron absorbs The energy is large enough to overcome the internal gravitational force of the object to do work and leave the original surface of the object to become photoelectrons. The current formed by the photoelectrons is called photocurrent.
Cloudy, rainy, snowy, can photovoltaic power plants still generate electricity?
In most people's cognition, photovoltaic power generation needs sunlight to generate electricity. Especially recently, it has been rainy everywhere. Many friends who have installed photovoltaics or want to install photovoltaics can't help but worry about whether the rainy weather will affect the impact. Photovoltaic power generation? Can it generate electricity if it snows in winter?
It is understood that while photovoltaic power generation obtains energy, it is indeed related to the four seasons, day and night, cloudy and sunny and other meteorological conditions. However, in rainy and snowy weather, although there is no direct sunlight, the power generation of photovoltaic power plants will be relatively low, but it is not that there is no power generation. Photovoltaic modules can also achieve a certain degree of power generation under low light conditions. The data in the above video shows that a 20-kilowatt photovoltaic power station generates 20 kWh of electricity on rainy days.
Although weather factors are beyond our control, we can do a good job in maintaining photovoltaic modules in our daily life. After the module is installed and starts to generate electricity, regular inspection and cleaning are very important. Regular inspection can keep abreast of the operating status of the power station. Regular cleaning can remove dust and other dirt on the surface of the module and improve the power generation efficiency of the module.
Cleaning steps for solar panels in rooftop power stations
Check the contamination level of the panels to be cleaned before cleaning.
In the case of light contamination - no particles, just dust, we recommend only washing or brushing alone.
When deep cleaning is required, if you find that there are particles on the surface or you are not sure whether it is not, then it is best to rinse it first, and then brush after the particles are rinsed away. Finally, it is best to rinse it again with clean water.
Use a small dry broom or rag to sweep off the attachments on the surface of the module, such as dry floating ash, leaves, etc. For hard foreign objects such as soil, bird droppings, and sticky objects attached to the glass, a slightly harder scraper or gauze can be used for scratching, but it should be noted that hard materials cannot be used to scratch to prevent damage to the glass surface. According to the cleaning effect, it is necessary to rinse and clean.
Rinse and clean. For objects that cannot be cleaned off such as residues of bird droppings, plant sap, etc. or wet soil that are closely attached to the glass, they need to be cleaned. The cleaning process generally uses clean water and a flexible brush to remove. If you encounter oily dirt, etc., you can use detergent or soapy water to clean the contaminated area separately.