YUANNENGJI Solar panels, also known as photovoltaic panels, are assembled from several solar cell modules. There are many types of photovoltaic panels, the most common and most commonly used are: monocrystalline silicon panels.
The performance parameters of monocrystalline silicon solar cells are relatively stable, and they have the highest photoelectric conversion efficiency among all types of panels. The monocrystalline silicon in the panels is generally encapsulated with tempered glass and waterproof resin, which makes it have a long service life and is suitable for use in southern areas with more rainy days and relatively insufficient sunlight.
The production process of amorphous silicon panels is simple, the consumption of silicon materials is very small, and it can also generate electricity under weak light conditions, which is suitable for use in areas with insufficient outdoor sunlight. In rural areas, solar street lights have a long service life, and can also reduce a lot of trouble in the future, without maintenance. Solar panels are the primary components of solar street lights. During the day, solar panels absorb sunlight, convert solar energy into electrical energy, and store it in energy storage devices. At night, the electrical energy in the energy storage device is automatically converted into light energy.
The life of photovoltaic modules is determined by their power generation efficiency, while the degree of PN junction bonding and the purity of silicon wafers determine the intensity of solar panel power generation under the same light. As time goes by, the PN junction will continue to break, so the efficiency will continue to decline. The conversion efficiency is above 90% after 16 gadus, and it will drop to about 85% after 25 gadus, so the life of the photovoltaic module is basically more than 20 gadus.
The hot spot effect refers to the fact that in a normally working battery module, at a certain moment, a single cell is blocked by a small object, resulting in a decrease in the current that this single cell can generate. The single cell in the battery module can be regarded as a P-N junction structure similar to a diode structure. When the current that the blocked single cell can generate is less than the current of the circuit, this single cell has a negative voltage and becomes a load.
The hot spot effect is also closely related to the production process of battery components. Due to defects in the production level, the internal resistance of the single battery is often uneven. Battery cells with uneven internal resistance are prone to hot spot phenomenon. The hot spot effect is very harmful to battery cells. At the least, the battery core will be burned, and at the worst, the entire battery component will be burned.