“< H2 > what is the structure, composition and working principle of solar panels
The solar power generation system is composed of solar battery pack, solar controller and battery (pack). If the output power supply is AC 220V or 110V, it is also necessary to configure inverter. The functions of each part are: (1) solar panel: solar panel is the core part of solar power generation system and the most valuable part of solar power generation system. Its function is to convert the radiation capacity of the sun into electric energy, or send it to the battery for storage, or promote the load to work. The quality and cost of solar panels will directly determine the quality and cost of the whole system. （2） Solar controller: the function of solar controller is to control the working state of the whole system and protect the battery from overcharge and over discharge. In places with large temperature difference, the qualified controller shall also have the function of temperature compensation. Other additional functions such as optical control switch and time control switch shall be optional to the controller. （3） Storage battery: generally lead-acid battery. Nickel hydrogen battery, nickel cadmium battery or lithium battery can also be used in small and micro systems. Its function is to store the electric energy emitted by the solar panel when there is light and release it when needed. （4） Inverter: in many occasions, 220VAC and 110VAC AC power supply is required. Because the direct output of solar energy is generally 12VDC, 24VDC and 48VDC. In order to provide electric energy to 220VAC electrical appliances, it is necessary to convert the DC energy generated by the solar power generation system into AC energy, so DC-AC inverter is required. In some cases, when loads with multiple voltages need to be used, DC-DC inverter should also be used, such as converting 24VDC electric energy into 5VDC electric energy (note that it is not a simple step-down). The following factors need to be considered in the design of solar power generation system: Q7, quantity of system demand
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What is the specific need to assemble a mobile phone charging system with solar panels + lithium battery packs
The system is actually solar energy to charge the lithium battery pack, which then charges the mobile phone. The charging voltage of the mobile phone is 5V, so the output voltage of your system should be 5V. You need a DCDC power chip to control the voltage to 5V. Because the internal solar panel charges the lithium battery, the voltage after your solar panel is connected in series and parallel cannot be too high. It’s best to add a voltage stabilizing tube to control it at 4.3v, and connect a diode in series to prevent backflow. If you want to consider safety regulations, you need to add ESD protective devices and fuses. There are some large capacitors on the power supply
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Excuse me, is solar panel an important part of solar power generation system? Why
The functions of each part are: (1) solar panel: solar panel is the core part of solar power generation system and the most valuable part of solar power generation system
Can the solar panel be disassembled
The solar energy manufacturer has special equipment, which cannot be disassembled by itself. It is also destructive in the enterprise. To put it bluntly, it is to break it directly and pick up the available parts one by one. There is no other way. The frame cannot be disassembled whether it is encapsulated with adhesive tape or silicone. Laminates can be opened, but large equipment and conditions are required. It can’t be opened under normal conditions. After opening, it’s relatively easy to separate the welding strip and battery, but it still needs equipment and conditions
How to draw the solar panel bracket
With CAD or other mechanical drawing software, you can also despise those black hearted advertisements that mislead consumption with pen and paper! For solar power generation, the power generation capacity per square meter is about 120W, and the cost per square meter is about 1500 yuan. The larger the area, the lower the price. In 2013, the photovoltaic industry was investigated by European and American antitrust. Overcapacity led to the closure of a large number of photovoltaic industries in Zhejiang, and the price of solar energy fell. This can be checked online at any time. It is suggested that the price of each solar water heater should be 150-180 yuan, including the cost of materials and other expenses. If you are optimistic about whether there are reliable after-sales solar panels in the local area for power generation, it is recommended to invite bidding on a group scale, mainly because the power transformation and storage equipment are very expensive, the highest conversion rate is 17% – 20%, and the efficiency is very low, It is not as good as plant photosynthesis. At present, the national clean energy and photovoltaic power generation support policy is more than 10kW, which can be connected to the grid free of charge, but the price recovery price is very low and the procedures are cumbersome. The monthly sales of roof photovoltaic power generation is less than 20000, which can be exempted from tax. According to the provisions of the national fiscal and tax policies, the generator needs to provide the sales invoice to the power supply enterprise, and the buyer also needs the invoice to offset the cost. However, the individual power generation does not have the qualification of industrial and commercial owner, and the procedures for obtaining the invoice are complicated. “”If you can’t get the invoice, it will increase the difficulty of sales for power producers and is not conducive to promotion. The document issued by the State Administration of Taxation will reduce the tax burden of power producers.”” According to the documents of the State Administration of Taxation, since July 1, 2014, the State Grid Corporation of China has purchased the power products of distributed photovoltaic power generation projects, and the State Grid Corporation of China has issued invoices. If the monthly sales of power products of power producers exceed 20000, the enterprises affiliated to the State Grid of China will levy value-added tax according to 50% of the tax payable. Those with monthly sales of less than 20000 yuan can be exempted from value-added tax
How to support the solar panel on the solar roof
The monthly sales of roof photovoltaic power generation is less than 20000, which can be exempted from tax. According to the provisions of the national fiscal and tax policies, the generator needs to provide the sales invoice to the power supply enterprise, and the buyer also needs the invoice to offset the cost. However, the individual power generation does not have the qualification of industrial and commercial owner, and the procedures for obtaining the invoice are complicated. “”If you can’t get the invoice, it will increase the solar mounting solutions difficulty of sales for power producers and is not conducive to promotion. The document issued by the State Administration of Taxation will reduce the tax burden of power producers.”” According to the documents of the State Administration of Taxation, since July 1, 2014, the State Grid Corporation of China has purchased the power products of distributed photovoltaic power generation projects, and the State Grid Corporation of China has issued invoices. If the monthly sales of power products of power producers exceed 20000, the enterprises affiliated to the State Grid of China will levy value-added tax according to 50% of the tax payable. Those with monthly sales of less than 20000 yuan can be exempted from value-added tax. According to the policy issued by the State Administration of Taxation last year, the collection rate is calculated at 3% from October 1, 2013 to December 3l, 2015. Take Takamatsu as an example. If the monthly sales amount is 30000, the tax he should pay is 30000 × 3% × 50% = 450 yuan. For each kwh of electricity generated by residents, the state subsidizes 0.42 yuan; The state uses the electricity price standard of desulfurized coal to purchase the self generated electricity that residents can’t use up, and the price is also 0.42 yuan per degree. Based on the average installed cost of 1 kW of a distributed photovoltaic power generation system of about 10000 yuan, if the average daily power generation of 8 kW system is 30 degrees and the household power consumption is 5 degrees per day (no more than the first gear electricity price of 0.52 yuan), the investment will be recovered in about 8 years. According to the same calculation method, the cost recovery of 10 kW distributed photovoltaic power generation device takes 9-10 years. The average cost recovery period of household photovoltaic power stations is between 8-10 years
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