The technical route of photovoltaic modules mainly includes three types: polycrystalline silicon, monocrystalline silicon and thin film. All technologies have advantages and disadvantages. Under the same conditions, the efficiency of a photovoltaic solar system is only related to the nominal power of the module, not directly related to the efficiency of the module. The component technology is mature, and the quality of domestic first- and second-tier component manufacturers is relatively reliable. There are two types of photovoltaic modules: 60 pieces and 72 pieces. Distributed photovoltaics are generally small in size and difficult to install. Therefore, it is recommended to use 60 pieces of modules for solar support, which are small in size, light in weight and easy to install.

Monocrystalline and polycrystalline power generation have been debated in recent years, but for ordinary users, it is of little significance. At present, the efficiency level of photovoltaic systems is between 75% and 90%, while the difference between single and polycrystalline power generation is within 2%, which has not yet reached the detection error. Many manufacturers do both single and polycrystalline. Choosing the right manufacturer is more important than choosing a single polysilicon. Users need to choose to buy from reliable channels, solar mounts, there are many second-hand components on the market. Special attention should be paid to solar mounts. For a certain area, if the customer wants to install a larger capacity, it is recommended to choose a single crystal high-efficiency module. Because the technical route is different,

The budget is fixed. If the customer wants to install more power generation, it is recommended to choose polycrystalline low-efficiency modules. The power generation efficiency of this low-efficiency component is not low. It may be that the high-efficiency components of the early years have not been sold, but the quality is still very good. If the manufacturer clears the inventory, the price will be lower than the normal components, but these components will not affect the power generation. If the roof of the car owner is not enough load-bearing, it is recommended to install CIGS flexible membrane modules and solar mounting brackets, which are light in weight and easy to install.

If it is a sun room and needs to transmit light, it is recommended to install cadmium telluride CdTe thin film modules. You can choose components with different light transmission characteristics according to the actual situation.