Photovoltaic modules have polycrystalline silicon, monocrystalline silicon, thin film three technical routes, various technologies have advantages and disadvantages, under the same conditions, the efficiency of the photovoltaic system is only related to the nominal power of the components, and the efficiency of the components are not directly related, the components technology is mature, domestic first- and second-tier brands of component manufacturers are more reliable quality. PV modules have 60 cells and 72 cells, distributed PV is generally small-scale, difficult to install, so it is recommended to use 60 cells components, small size and light weight easy to install.
Monocrystalline and polycrystalline power generation, in recent years the debate is very intense, but for the average user, the significance is not significant, the current level of PV system efficiency between 75% and 90%, and the difference between single polycrystalline power generation within 2%, less than the error of detection, many manufacturers are doing both monocrystalline and polycrystalline, choose the right manufacturer than choose the right single polycrystalline more important, the user needs to choose from reliable channels to buy, the market also has Many second-hand components on the market, pay special attention.
If the customer wants to install a larger capacity, it is recommended to choose monocrystalline high-efficiency modules, because the technical route is different, the same area, monocrystalline modules will generally be 5-10W higher than polycrystalline modules.
Budget certain, customers who wish to install more power generation, it is recommended to choose polycrystalline low efficiency components, this low efficiency components, not low power generation efficiency, may be the high efficiency components in earlier years were not sold, but the quality is still very good, if it is the manufacturer to clear the inventory, the price will be lower than normal components, but these components will not affect the power generation.
If the owner's roof does not carry enough load, it is recommended to install CIGS flexible thin film modules, which are light in weight and easy to install.
If it is a sunroom and needs light transmission, it is recommended to install CdTe CdTe thin film modules, which can be selected according to the actual situation with different light transmission performance.
