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GreenMatch","yoastHead":"\n\n\n\n\n\n\n\n\n\n\n\n\n\t\n\t\n\t\n\n\n\t\n\n","template":"content-and-sidebar.php","contentTitle":"How are Solar Panels Made?","content":"\n
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How Are Solar Panels Produced?
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A solar PV module consists of solar cells, glass, EVA, backsheet and frame. Learn more about the components and the process of manufacturing a solar panel.
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Solar panels are a complicated piece of technology that requires a qualified engineer for installation. If you’re interested in harnessing the power of the sun to power your home, fill out our form today to receive up to three free quotes from pre-vetted solar panel installers in your area.
\n\n\n\n
By filling out our simple and easy 1-minute contact form, you can receive up to 3 free quotes from vetted installers in your area. So don’t hesitate, get your free solar panel quotes today by clicking the button below!
Thus, at cell structure level, there are different types of material for manufacturing, such as mono silicon, polysilicon or amorphous silicon (AnSi). The first 2 kinds of cells have a somewhat similar manufacturing process. Read below about the steps of producing a crystalline solar panel.
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Step 1: Sand
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It all starts with the raw material, which in our case is sand. Most solar panels are made of silicon, which is the main component in natural beach sand.
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Silicon is abundantly available, making it the second most available element on Earth.
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However, converting sand into high grade silicon comes at a high cost and is an energy intensive process. High-purity silicon is produced from quartz sand in an arc furnace at very high temperatures.
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Step 2: Ingots
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The silicon is collected, usually in the form of solid rocks. Hundreds of these rocks are being melted together at very high temperatures in order to form ingots in the shape of a cylinder. To reach the desired shape, a steel, cylindrical furnace is used.
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In the process of melting, attention is given so that all atoms are perfectly aligned in the desired structure and orientation. Boron is added to the process, which will give the silicone positive electrical polarity.
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Mono crystalline cells are manufactured from a single crystal of silicon. Mono Silicon has higher efficiency in converting solar energy into electricity, therefore the price of monocrystalline panels is higher.
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Polysilicone cells are made from melting several silicon crystals together. You can recognise them by the shattered glass look given by the different silicon crystals. After the ingot has cooled down, grinding and polishing are being performed, leaving the ingot with flat sides.
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Step 3: Wafers
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Wafers represent the next step in the manufacturing process.
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The silicon ingot is sliced into thin disks, also called wafers. A wire saw is used for precision cutting. The thinness of the wafer is similar to that of a piece of paper.
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Because pure silicon is shiny, it can reflect the sunlight. To reduce the amount of sunlight lost, an anti-reflective coating is put on the silicon wafer.
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Step 4: Solar cells
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The following processes will convert a wafer into a solar cell capable of converting solar power into electricity.
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Each of the wafers is being treated and metal conductors are added on each surface. The conductors give the wafer a grid-like matrix on the surface. This will ensure the conversion of solar energy into electricity. The coating will facilitate the absorption of sunlight, rather than reflecting it.
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In an oven-like chamber, phosphorous is being diffused in a thin layer over the surface of the wafers. This will charge the surface with a negative electrical orientation. The combination of boron and phosphorous will give the positive – negative junction, which is critical for the proper function of the PV cell.
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Step 5: From Solar Cell to Solar Panel
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The solar cells are soldered together, using metal connectors to link the cells. Solar panels are made of solar cells integrated together in a matrix-like structure.
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The current standard offering in the market are:
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48 cell panels – suitable for small residential roofs.
60-cell panels – this is the standard size.
72-cell panels -used for large-scale installations.
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The most common sized system in terms of kWh for UK homes is the 4kWh solar system.
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After the cells are put together, a thin layer (about 6-7 mm) of glass is added on the front side, facing the sun. The backsheet is made from highly durable, polymer-based material. This will prevent water, soil, and other materials from entering the panel from the back. Subsequently, the junction box is added, in order to enable connections inside the module.
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It all comes together once the frame is assembled. The frame will also provide protection against impact and weather. The use of a frame will also allow the mounting of the panel in a variety of ways, for example with mounting clamps.
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EVA (ethylene vinyl acetate) is the glue that binds everything together. It is very important that the quality of the encapsulant is high so it doesn’t damage the cells under harsh weather conditions.
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Step 6: Testing the Modules
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Once the module is ready, testing is carried out to ensure the cells perform as expected. STC (Standard Test Conditions) are used as a reference point. The panel is put in a flash tester at the manufacturing facility. The tester will deliver the equivalent of 1000W/m2 irradiance, 25°C cell temperature and an air mass of 1.5g. Electrical parameters are written down and you can find these results on the technical specification sheet of every panel. The ratings will reveal the power output, efficiency, voltage, current, impact and temperature tolerance.
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Apart from STC, every manufacturer uses NOCT (nominal operating cell temperature). The parameters used are more close to ‘real life’ scenario: open-circuit module operation temperature at 800W/m2 irradiance, 20°C ambient temperature, 1m/s wind speed. Again, the ratings of NOCT can be found on the technical specification sheet.
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Cleaning and inspection are the final steps of the production before the module is ready to be shipped to homes or businesses.
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Research and development in the solar energy industry is aiming at reducing the cost of solar panels and increasing efficiency. The solar panel manufacturing industry is becoming more competitive and is forecasted to become more popular than conventional sources of energy, such as fossil fuels.
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If you’re interested in joining thousands of UK homeowners who have already switched to renewable energy, GreenMatch can help you take the first step. By getting multiple quotes you can be assured you’re getting the best deal.
\n\n\n\n
Start getting quotes from trusted solar panel installers today, by filling out our 1-minute contact form! You’ll be offered up to 3 free quotes that you’re able to compare and choose from to find the best deal. This service is completely free and non-binding!
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This is needed to confirm your enquiry and to connect you with the right installers.
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What happens next?
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If you want to speed up the process, you can call us at 0330 818 7480 \n(Opening hours: Sunday- Friday 9:00-20:00, Saturday 09:00-17:00.)
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模块一旦准备好了,测试执行,确保细胞按预期执行。STC)(标准试验条件)是作为一个参考点。面板将在一瞬间试验机制造工厂。测试人员将相当于1000 w / m2辐照度,25°C细胞温度和1.5 g的气团。电气参数都写下来,你可以找到这些结果在每个面板的技术规范表。评级将揭示了输出功率、效率、电压、电流、影响和耐热性。
除了优质,每个厂家都使用NOCT(名义操作单元温度)。所使用的参数更接近真实生活的场景:开路模块操作温度在800 w / m2辐照度,20°C的环境温度,1米/秒风速。可以找到的评级NOCT技术规范表。