01、What is photovoltaic?

Photovoltaic, also known as solar photovoltaic power generation system, is a new type of power generation system that uses the photovoltaic effect of solar cells made of semiconductor materials to directly convert solar radiation energy into electrical energy. Because the term "photovoltaic" is relatively novel, ordinary people can easily understand it by replacing it with the term "solar energy".

02、How does photovoltaic power generation work?

Solar photovoltaic power generation is a process that directly converts solar radiation energy into electrical energy by utilizing the photovoltaic effect of semiconductor materials, which drives charges to produce voltage and output current.

03、How long is the lifespan of a photovoltaic system?

A photovoltaic system mainly consists of photovoltaic panels, brackets, inverters, and cables. Under normal circumstances, the design life of the system is 25 years, the lifespan of photovoltaic panels is 20-25 years, the brackets last for 25 years, the inverters last for 10 years, and the cables last for 25 years. With the improvement of manufacturing technology, the overall lifespan will be extended.

04、What kind of climate and terrain can photovoltaic panels be installed in?

Photovoltaic panels can be installed in any climate and terrain. Generally speaking, the higher the altitude, the greater the advantage of sunshine. Most areas in China belong to a continental climate with long sunshine hours, so almost all areas are suitable for installing photovoltaic panels. Zhongshan city has an average annual sunshine hours of 1843.5 hours, and the average annual total solar radiation is 445155.4 joules/square centimeter, making it one of the places with abundant solar resources in the province.

05、Where can photovoltaic panels be installed?

Generally, photovoltaic panels are installed on rooftops, with no obstructions on the southeast, south, or southwest sides. They are usually installed facing south, and the specific angle is determined by the design unit through data query in advance. For color steel tiles (zinc iron sheds), the load-bearing capacity needs to be inspected on-site before installation, while general cement roofs can be installed, and uneven roofs can also be fixed and installed using cement brackets.

06、How to do daily maintenance for solar panels?

After the installation of a solar panel system, it is generally considered to be in a "maintenance-free" state. Since the surface of the solar panels is made of inorganic materials and is very smooth, there won't be moss or similar things growing on it, and natural rainfall will keep the surface clean.

07、How much energy can a solar panel drive?

This depends on the battery capacity and inverter power used by the user, which is not within the control of the solar panel. Solar panels for solar street lights are only used to charge the battery, not to store electricity. Solar energy charges the battery, and the battery discharges to power electrical equipment. This is a charging and discharging process. The size of the inverter determines the power needed to drive the electrical appliance, while the size of the battery depends on how long it can provide power. Customers need to have some basic knowledge of electricity. If they do not understand these principles, they can seek more advice.

08、Many users ask why they cannot reach the rated current using a multimeter?

This is because short-circuit current is a parameter used to measure the quality of solar panels, which can only be detected by a module tester. Multimeters themselves are loads, so the parameter to be checked is the working current data. In addition, the testing conditions for solar panels are 1000 watts/square meter and 25 degrees Celsius, and the testing should be carried out under standard light intensity. Solar panels will encourage users to equip themselves with solar panels that meet local requirements based on different purchasing areas and climate conditions.

09、Is a controller not needed for a solar panel?

A controller must be used! Otherwise, it may cause overcharging or over-discharging of the battery, affecting the service life of the battery. The function of the controller is to intelligently control the solar energy, battery, and load, and then maintain the battery, avoid overcharging, over-discharging, short circuit maintenance, etc., and intelligently control the operating time of the load. For more information, please refer to the controller manual. In addition, the load of the controller also has current requirements. The load of a 10A controller generally does not exceed 12A current. Relative to this, a 10A controller can support appliances below 120W, a 20A controller can support appliances below 300W, and a 30A controller can support appliances below 500W. Buyers can choose freely.

10、Which is better, monocrystalline or polycrystalline?

Both are good products. The specific difference is that monocrystalline panels have a higher power generation on sunny days, higher conversion efficiency, and slower attenuation than polycrystalline panels. Under cloudy weather conditions, the partial weak light of polycrystalline silicon panels is better than that of monocrystalline silicon. Therefore, polycrystalline silicon is mainly used in rainy weather in the south. Users in the north mainly use monocrystalline silicon because the climate in the north is better than in the south. When using solar panels, they must face 12 o'clock. The angle between the panel and the ground should be 30-45 degrees, and the viewpoint should face south. Do not place the solar panel on the ground, as this will result in low power generation.

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