How to maintain solar panels?
How to maintain solar panels? :
A solar panel is a device that absorbs sunlight and converts solar radiation directly or indirectly into electrical energy through the photoelectric effect or photochemical effect. The main material of most solar panels is "silicon", but due to the high cost of production, the its widespread use still has some limitations. Compared with ordinary batteries and rechargeable batteries, solar cells are more ecological and environmentally friendly green products.
photovoltaic technology - prices, offersHow long is the lifespan of the solar panel?
The lifespan of the laminated glass solar panel is 25 years, the lifespan of the PET laminated solar panel is 5-8 years, and the lifespan of the encapsulated adhesive solar panel is 2-3 years. Over 95% of solar panels on the market are solar panels that are laminated and packaged with toughened glass. Η lifetime of a photovoltaic unit is determined by the power generation efficiency, and the connection degree of the PN junction and the purity of the silicon board determine the resistance of the solar panel to generate electricity under the same light. Over time, the PN junction will continue to break. In this way, performance will continue to decrease. The conversion efficiency will be more than 90% after 15 years and will drop to about 85% after 25 years, so the lifetime of PV components is basically more than 20 years.
The main influencing factors include the following two aspects:
1. Phenomenon hot spot. The hot spot effect refers to the fact that a single cell is covered by a small object at a certain time in a normal operating battery unit. As a result, the current that this single cell can generate becomes smaller. The individual cell in the battery module can be considered as a PN junction structure similar to a diode, which has the phenomenon of reverse avalanche breakdown. a load. And consume the energy emitted by other individual cells in the form of heat. The hot spot phenomenon is also closely related to the manufacturing process of the battery module. Due to defects at the manufacturing level, the internal resistance of individual cells is often uneven. Cells with uneven internal resistance are prone to hot spots.
2. Effect of environmental factors
Temperature, light intensity, wind load, and snow and ice load will also affect battery life.
3. Life cycle of solar collectors. Solar panels have a long life cycle, and some solar panels installed in the 1890s still produce clean electricity—but their durability comes at a cost.
To give solar panels a lifespan of 25 years or more, all kinds of expensive sealants and protective layers are used on solar panels.
