A rooftop solar power system has various components include photovoltaic modules, mounting systems, cables, solar inverters and other electrical accessories. A solar hybrid system (either on-grid or off-grid) combines other power components like diesel generators, wind turbines, batteries etc. They are capable of providing a continuous source of power. Installation method of roof photovoltaic system Nowadays, there are several types of roofs for solar photovoltaic power generation, among which sloping roofs, flat roofs, and color steel roofs are more common. The installation conditions of the roof should determine the utilization area, shelter, waterproof, load bearing, etc. Firstly, determine the usable area of the roof, because the usable area directly determines the installed capacity of the photovoltaic system. Secondly, it is necessary to pay attention to the orientation of the roof. If the roof faces south, it will receive more solar radiation and the power generation will increase. Finally, it is necessary to consider whether there are tall buildings around, waterproofing of the roof, etc. The shelter of tall buildings will affect the lighting, and a good waterproof system may prolong the life cycle of the power station. 1. Installation method of pitched roof Photovoltaic modules are mainly installed along the slope and overhead, and the vertical distance between the modules and the roof meets the requirements for installation and ventilation and heat dissipation gaps. The photovoltaic array is laid parallel to the roof, and the bracket adopts steel embedded parts to fix the beams in a lattice. 2. Installation method of flat roof The structure selection of the flat roof can be based on the actual practice of the finished surface of the roof, and the corresponding support system can be selected, and the inclination angle corresponding to the maximum value of the local annual total power generation can be used as the installation inclination angle of the bracket. In addition, the waterproof layer of the photovoltaic system on the flat roof is very important. Waterproof membranes, cement mortar protective layers, ceramic tiles, etc. should be used to do a good job of waterproofing. 3. Installation method of color steel roof Color steel tiles are generally used in family factories or large industrial plants. The difference between its installation method and the slope roof lies in the installation method of the support. If the structural bearing capacity of the roof is satisfied, the inclination angle can be raised to increase the installation angle.

World record for n-type polycrystalline solar cells, Canadian solar conversion efficiency 23.81% Canadian Solar announced on March 12, 2020 that it has achieved a conversion efficiency of 23.81% for large-area n-type polycrystalline silicon solar cells and set a new world record. The German Institute for Solar Energy (ISFH) in Germany has tested and certified it. The polycrystalline cell that recorded a conversion efficiency of 23.81% this time was manufactured using PASCon (passivation contact) technology using an n-type P5 (cast mono) silicon wafer with a surface area of 246.44 cm 2 and a surface area of 246.44 cm 2. The company recommends the development of products using its own P5 technology, and in April 2019, it had a conversion efficiency of 22.28%, which was the world record at the time, and in September of the same year, achieved 22.80%, Keep updating records

FIT price for FY2020 officially decided, major changes in solar market such as "regional utilization requirements" The Ministry of Economy, Trade and Industry has announced the purchase price and levy unit price of the renewable energy fixed price purchase system (FIT) in FY2020. The levy unit price borne by consumers increased by 0.03 yen from FY2019 to 2.98 yen / kWh, and a new certification system such as "regional utilization requirements" has been established. On March 23, 2020, the Ministry of Economy, Trade and Industry announced the purchase price and levy unit price of the renewable energy fixed price purchase system (FIT) for FY2020. The levy unit price borne by customers will increase by 0.03 yen from FY2019 to 2.98 yen / kWh. In the case of an average model home (260kWh of monthly power consumption), the cost will be 774 yen per month and 9288 yen per year. Compared to FY2019, the annual burden was 84 yen, and the monthly burden was 7 yen. New certification conditions such as "regional utilization requirements" The purchase price of commercial solar power in FY2020 is 13 yen / kWh for 10kW or more and less than 50kW, 12 yen / kWh for 50kW or more and less than 250kW, and the price is determined by the bidding system for 250kW or more. The target of the bidding system has been expanded from 500kW or more so far. Furthermore, the so-called small-scale business photovoltaic power generation of 10 kW or more and less than 50 kW is a requirement for FIT certification, "self-consumption type local utilization requirements", such as being available for self-consumption type at the time of disaster Set. Only surplus electricity is purchased by FIT. On the other hand, the FIT system has virtually ended the support for the field-type business of selling all electric power. The self-consumption rate of 30% or more is required for the small-scale solar power generation to be recognized as a requirement for regional use. Furthermore, a self-sustaining operation function in the event of a power failure is also required. Of the small-scale business solar power, in the case of farming-type solar power generation (solar sharing) that has been approved for the temporary conversion of farmland, even if it is a project that does not consume its own, it has an independent operation function. If so, it is certified as meeting regional utilization requirements. The purchase price of residential solar power generation is 21 yen / kWh. The same JPY 24 / kWh as in FY2019 will be applied to biomass power generation using general wood of less than 10,000 kW. The purchase price of 10,000 kW or more and biomass liquid fuel (all sizes) will be decided by the bidding system. For wind power generation, 18 yen / kWh, which is 1 yen down from FY2019, will be applied for newly installed projects. Other replacement projects and floating offshore wind power were 16 yen / kWh and 36 yen / kWh, respectively, and were left unchanged from FY2019. Landing-type offshore wind po...

Photovoltaic power station to fight against storm Release time: 2017-11-09 In order to resist natural disasters, it is necessary to control the location, design and installation of photovoltaic power stations. After the completion of the construction of the power station, how to effectively prevent natural disasters, the role played by the later operation and maintenance can not be underestimated, the above steps can be described as interlocking and indispensable. Therefore, in the storm-prone area, the following four points should be done to build a distributed photovoltaic power station: I. Site selection: ensuring the quality of the building Any building must be designed with safety in mind. In the past, building materials were often heavy, and the design was mainly based on support capacity and prevention of earthquake risks. In recent years, with the advent of lightweight materials, the risk of these building materials being blown away by the wind is also considered in design, preventing the roof from being torn by the airflow. At present, household distributed photovoltaic power plants are mainly installed on inclined roofs and flat roofs. The flat roof covers concrete flat roof, color steel flat roof, steel flat roof, ball joint roof and so on. There are also some places to pay attention to the installation location of the PV power plant. It is necessary to consider the installation location, installation orientation, installation angle, load requirements, and arrangement and spacing. From this point of view, the location of the photovoltaic power station can not be determined by a single finger. Mounting components on a beveled roof Second, the design: improve the strength of the component, design the appropriate windshield From the perspective of component materials, the choice of component backplane, frame material, and package glass can be considered to improve the anti-impact and anti-seismic properties of the components for specific climate environments, thereby improving the ability to withstand special situations. From the perspective of power plant design, while weighing the cost of photovoltaic power station and power generation, the strength design requirements of photovoltaic supports and component clamps can be appropriately increased, and the inclination of components with better wind resistance can be reasonably selected. In addition, consider designing a suitable windshield. The wind deflector is fixedly mounted on the rear pillar of the bracket system, and the panel is provided with a plurality of air guiding ports, which have the functions of guiding the flow and reducing the wind pressure of the assembly. The beam of the bracket system is reduced in force, the pulling force of the foundation is reduced, and the safety factor of the photovoltaic power station structure is improved. However, the force on the rear pillar is increased, and the axial shear force of the foundation is increased. The foundation force is checked....