Nowadays, many rural users have installed photovoltaic power generation systems on their roofs and courtyards. The same 5kW photovoltaic power generation system has a large difference in power generation neighborhoods. The same 5kW power station, the same sun exposure, why is the gap so large? If you don't want your own photovoltaic system to lose on the starting line, then you have to do your homework in design, installation, equipment selection and post-operation.
The low power generation of photovoltaic systems is usually related to the external environment and internal factors.
Let me talk about the external environment first.
Distributed photovoltaic systems are mostly built in rural and factory roofs. In rural areas, there are large user courtyards, and a place is also set up to install photovoltaic systems. The difference in installation environment has a partial impact on power generation. Why do you say that? If it is built on the roof, it is necessary to consider whether there is a building blockage before and after, the plant is blocked, the components are left and right, and the front and back are blocked. If there is none of these, then it depends on whether there is dust on the surface of the component, whether there are bird droppings, deciduous branches, etc., don't look at these small details. If you don't pay attention, it will have a small impact on power generation and components.
(Figure: front and rear occlusion)
Look at the internal factors.
The photovoltaic power generation system is mainly composed of components ( solar panels ), photovoltaic inverters , photovoltaic supports, combiner boxes and related auxiliary materials. There are two related to efficiency, photovoltaic components , inverters . For components, the efficiency in the market is generally 15%-18%, while the high-efficiency components of some big brands can reach 21.5%. For the inverter, the mainstream brands of the 5kW power segment are basically maintained between 97% and 98%. Of course, the efficiency of components and inverters is also lower. Differences in efficiency and disparity are important factors influencing power generation. The 2015 “Runners†program has specific efficiency requirements for single crystal, polycrystalline, and thin film modules. How to make the power generation of your own power station win at the starting line? Then the user should do this, in which the conversion efficiency of the monocrystalline silicon photovoltaic cell module reaches 17%, the conversion efficiency of the polycrystalline silicon photovoltaic cell module reaches 16.5% or more, and the conversion efficiency reaches 10% or more of the thin film photovoltaic cell module, if the enterprise fails to meet such a standard Can not enter the PV leader plan.
In addition, cable, DC and AC loop cables will also have line loss. Although it is not a critical factor, it should also be noted.
Understand the internal and external factors that affect the system's power generation. If users do not want their own power generation to lose at the starting line and lose to the neighborhood, then how do users do it?
The component “facing south, the inverter facing north†should face the sun as much as possible to ensure the maximum radiation angle. Generally, the local latitude plus 5 degrees is installed during installation. The angle of installation is generally south and slightly west. Inverter is the opposite. It is best to avoid direct sunlight. The upper part of the inverter is better to have a sunshade device. In addition, the temperature of the machine will increase during the operation of the inverter. This requires the surrounding air to be installed in the inverter. Well, this will help the inverter to dissipate heat.
The inverters in the PV system are basically IP65 protection grades. Everyone mistakenly thinks that they can directly withstand wind, rain and sun. In fact, there are many components in the inverter, and the external environment with long life will affect the environment. Its life, which in turn affects the life of the inverter.
Regular maintenance. The components are cleaned up. There is data that the dust on the PV modules will cause power loss, up to 6%. The photovoltaic system is a tool for users to save money and make money more diligent.
How to make the power generation of your own power station win at the starting line? Then the user should do another cable, DC and AC loop cables will also have line loss, although not a key factor, but also pay attention. It is designed to use conductive wires with sufficient diameter.
Of course, as mentioned above, if you find a professional system design company, they will help you solve it. If you encounter an unprofessional system company, or a liar company, you use some degraded components and poor quality inverters. Your power generation capacity is naturally lost at the starting line.
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