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    "title": "The Manufacturing Process and Technology of Photovoltaic Modules -  - Ooitech, the world's leading solar panel production line solutions provider, supply chain expert, solar panel making machine facotry",
    "description": "A complete guide to the photovoltaic module manufacturing process, covering module structure, half-cell technology, and the full production workflow from cell stringing to lamination and final testing.",
    "keywords": "photovoltaic module manufacturing, solar module production process, half-cell module, cell stringing, lamination, EL testing, solar panel assembly",
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        {
            "level": 2,
            "text": "The Manufacturing Process and Technology of Photovoltaic Modules"
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        {
            "level": 3,
            "text": "The Manufacturing Process and Technology of Photovoltaic Modules"
        },
        {
            "level": 5,
            "text": "Introduction to Photovoltaic Modules"
        },
        {
            "level": 5,
            "text": "Equipment Used in Module Production"
        },
        {
            "level": 5,
            "text": "Module Structure"
        },
        {
            "level": 6,
            "text": "Half-Cell Module Structure"
        },
        {
            "level": 5,
            "text": "Module Production Workflow"
        },
        {
            "level": 6,
            "text": "Stringing"
        },
        {
            "level": 6,
            "text": "Layup"
        },
        {
            "level": 6,
            "text": "Lamination"
        },
        {
            "level": 6,
            "text": "Framing"
        },
        {
            "level": 6,
            "text": "Junction Box Installation"
        },
        {
            "level": 6,
            "text": "Curing"
        },
        {
            "level": 6,
            "text": "Testing"
        },
        {
            "level": 5,
            "text": "Production Flow of a Single PV Module"
        },
        {
            "level": 5,
            "text": "Ooitech's View"
        },
        {
            "level": 5,
            "text": "Tags :"
        },
        {
            "level": 5,
            "text": "Category"
        },
        {
            "level": 5,
            "text": "Recent Post"
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        },
        {
            "level": 5,
            "text": "Popular Tags"
        },
        {
            "level": 3,
            "text": "Request A Quote"
        },
        {
            "level": 2,
            "text": "We deliver expertise you can trust our service"
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        {
            "level": 3,
            "text": "Cost-Effective Advantages"
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        {
            "level": 3,
            "text": "Our Experience Team"
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        {
            "level": 3,
            "text": "15+ Years Industry Experience"
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        {
            "level": 2,
            "text": "What Our Client Say's about us"
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        {
            "level": 3,
            "text": "Jizzakh Polytechnic Institute"
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        {
            "level": 3,
            "text": "Amjad"
        },
        {
            "level": 3,
            "text": "KTECH"
        },
        {
            "level": 3,
            "text": "Mark"
        },
        {
            "level": 2,
            "text": "Our Latest Products"
        },
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        },
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        },
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        },
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        },
        {
            "level": 3,
            "text": "Automatic Tape Sticking Machine for Solar Panel Production Line | Ooitech"
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    "markdown": "# The Manufacturing Process and Technology of Photovoltaic Modules -  - Ooitech, the world's leading solar panel production line solutions provider, supply chain expert, solar panel making machine facotry\n\n> A complete guide to the photovoltaic module manufacturing process, covering module structure, half-cell technology, and the full production workflow from cell stringing to lamination and final testing.\n\n![The Manufacturing Process and Technology of Photovoltaic Modules](https://cdn.ooitech.com/static/upload/image/20260625/237d34de6d3c2fac8b8330122bb4ab7a.webp)\n\n- ** 2026-06-25\n- ** 0 Views\n- ** [Blog](/Blog.html)\n\n### The Manufacturing Process and Technology of Photovoltaic Modules\n\n##### Introduction to Photovoltaic Modules\n\nThe photovoltaic industry chain is divided into four stages: polysilicon, wafer, solar cell, and module. The PV module sits at the downstream end of the chain, positioned between the solar cell and the complete PV system.\n\nA single solar cell generates only a limited amount of electricity. Cells must be connected in series and encapsulated into a module before they can serve as a usable power source. The PV module is therefore the smallest indivisible solar device capable of providing direct current output on its own. As the smallest effective power-generating unit, it consists of nine core components: solar cells, interconnect ribbons, bus bars, tempered glass, EVA, backsheet, aluminum alloy frame, sealant, and junction box.\n\nAmong the four stages of the PV chain, the module segment was the earliest to develop and mature in China.\n\nModule production mainly involves two key steps: cell interconnection and lamination. Cell interconnection determines the electrical performance of the module. The standard cell count for a PV module is 60 or 72 cells, connected by 10 or 12 copper ribbons acting as bus bars, with six groups interconnected to form one module.\n\nA PV module is expected to last at least 25 years, so it must withstand environmental stress and provide a degree of mechanical strength. After cell interconnection, the materials are typically arranged from bottom to top as tempered glass, EVA, cells, and backsheet, then sealed together through lamination. The backsheet and tempered glass encapsulate the cells and EVA inside, while the aluminum frame and sealant protect and seal the edges.\n\nThe overall module manufacturing workflow can be broken down into: soldering, layup, lamination, EL testing, framing, junction box installation, cleaning, IV testing, final inspection, and packaging. Among these, soldering and lamination carry the highest technical content and value.\n\n##### Equipment Used in Module Production\n\nModule equipment corresponds directly to each stage of the production workflow. The main machines include laser cutting machines, tabber stringers, automatic layup equipment, laminators, and automatic production lines.\n\nLooking at the individual stages: the soldering stage requires laser cutting machines, bus bar welding machines, and cell tabber stringers; the layup stage uses template-placing machines; the lamination stage requires a laminator; the EL testing stage requires an EL tester; the framing stage requires automatic frame-placing and framing machines; the junction box stage requires a junction box soldering machine; the cleaning stage requires module turnover units; the IV testing stage uses an IV curve tester; final inspection requires a turnover inspection unit; and packaging requires a packaging line.\n\nBeyond individual machines, equipment suppliers can also provide fully automated module assembly lines covering every stage, enabling turnkey projects.\n\nThe quality and cost of solar cell modules directly affect the quality and cost of the entire system. So what does the module production workflow actually look like?\n\n##### Module Structure\n\n###### Half-Cell Module Structure\n\nIn half-cell modules, the cells are cut in half so that the operating current of each cell is halved. This significantly reduces electrical losses on the ribbons and improves the module's cell-to-module (CTM) ratio.\n\nThe gaps between cells in a half-cell module are larger, slightly increasing the light reflected from the glass back onto the cells. The higher the cell current, the greater the benefit gained from half-cell technology.\n\n##### Module Production Workflow\n\nThe module production process generally passes through seven stages: stringing, layup, lamination, framing, junction box installation, curing, and testing, before final packaging and delivery to the market. Unlike full-cell modules, half-cell modules implement cell cutting at the module stage, adding a cutting step with a laser cutting machine, after which the stringing and layup processes are adjusted. On the cell side, half-cell technology requires adjusting the cell layout.\n\n###### Stringing\n\nUsing ribbons (either manually or automatically), the front and back of each cell are soldered together to form a series-connected cell string.\n\nKey process controls: cold soldering, over-soldering, cell cracking, and solder pull strength.\n\nThe mainstream layout for half-cell modules adopts a two-section design (as shown). The upper and lower halves are connected in parallel and use bypass diodes. The lead-out point changes from the top of a full-cell module to the middle, making it suitable for vertical installation.\n\n###### Layup\n\nAfter the cell strings are connected and pass inspection, the cell strings, glass, cut EVA, and backsheet are laid out in a specific order in preparation for lamination. During layup, the relative positions of the cell strings and materials such as the glass are kept fixed, and the spacing between cells is adjusted to provide a good foundation for lamination. The layup order from bottom to top is: glass, EVA, cells, EVA, glass fiber, and backsheet.\n\n###### Lamination\n\nThe laid-out cell assembly is placed in the laminator. Air inside the module is removed by vacuum, then heat is applied to melt the EVA, bonding the cells, glass, and backsheet together. Finally, the module is cooled and removed. Lamination is the critical step in module production, with lamination temperature and time determined by the properties of the EVA. When using ordinary EVA, the lamination cycle time is about 10 to 15 minutes, with a curing temperature of 135 to 145 degrees Celsius.\n\nKey process controls: bubbles, scratches, dents, bulging, and cell cracking.\n\nIt is worth noting that before lamination, strict appearance inspection and EL testing are required to ensure module performance and safety.\n\nAppearance inspection\n\nEL inspection\n\n###### Framing\n\nThe frame protects the edges and corners of the module's tempered glass and the laminated module, making later installation easier.\n\nKey process controls: dents, abrasions, scratches, missing mounting holes, sealant overflow on the back, bubbles, and lack of sealant.\n\n###### Junction Box Installation\n\nThe junction box connects and protects the PV module while conducting the current generated by the module out for the user.\n\nKey process controls: bubbles and sealant overflow.\n\n###### Curing\n\nThe sealant injected during the earlier framing and junction box installation steps is cured to strengthen the seal and protect the module from harsh external environments afterward.\n\nKey process controls: curing time, temperature, and humidity.\n\n###### Testing\n\nElectrical performance parameters are measured to determine the module's grade. Three main tests are included: insulation withstand voltage testing, which checks the safety between the frame and internal live parts (cells, ribbons, etc.) under high voltage; ground continuity testing, which measures the resistance between the frame and ground to confirm whether the frame grounding is sound; and IV testing, which measures electrical performance parameters to determine the module grade.\n\n##### Production Flow of a Single PV Module\n\n- An industrial robot places book-sized single PV cells onto the production line.\n- The arranged PV cells are bonded and soldered, with a row of 12 cells soldered and cut. Before mechanization, this work required roughly four or five people working simultaneously.\n- The soldered PV cells undergo quality inspection. Those without quality issues are sent directly to the next stage for arrangement and organization.\n\n- The PV cells are arranged into six rows of 12 cells each per group.\n- Heating, gluing, and film application are carried out.\n\n- The first layer is glass, the second is EVA, the middle is the PV cells, the fourth is again EVA, and the fifth is the backsheet, used for waterproofing and corrosion resistance.\n\n- A monocrystalline PV module group has five layers. Lamination fuses these five layers into one.\n\n- After lamination and four hours of cold curing, manual dust removal is performed and the edges and corners are inspected.\n\n- The finished PV module undergoes a simulated sunlight functional test.\n- Final inspection and packaging are carried out.\n\n##### Ooitech's View\n\nOoitech believes: photovoltaic module manufacturing comes down to precise cell stringing and reliable lamination, with half-cell technology and strict EL testing as the keys to higher efficiency and long-term reliability.\n\n---\n\n##### Tags :\n\n\n![](/template/ooitech/assets/img/shape/06.png)\n\n![](https://cdn.ooitech.com/static/upload/image/20250909/1757399770541443.webp)\n\n### Request A Quote\n\nAll uploads are secure and confidential.\n\n## We deliver expertise you can trust our service\n\nDirect-from-Factory Equipment.\n\n![](/template/ooitech/assets/img/icon/money-2.svg)\n\n### Cost-Effective Advantages\n\nWe deliver exceptional value, maximizing results while optimizing budgets for clients.\n\n![](/template/ooitech/assets/img/icon/staff.svg)\n\n### Our Experience Team\n\nOur skilled professionals specialize in innovative solutions and tailored strategies.\n\n![](/template/ooitech/assets/img/icon/certified.svg)\n\n### 15+ Years Industry Experience\n\nDeep expertise ensures reliable, trend-aware, and proven outcomes for success.\n\n![](https://cdn.ooitech.com/static/upload/image/20250910/1757477357667605.webp )\n\n![](https://cdn.ooitech.com/static/upload/image/20250910/1757477724911512.webp)\n\n![](/template/ooitech/assets/img/shape/06.png)\n\n## What Our Client Say's about us\n\nClient testimonials praise our deep understanding of their challenges, which leads to innovative solutions and strong ROI. Long-term collaborations—some over a decade—demonstrate their trust and satisfaction. Their success stories drive us to continually exceed expectations. [Know More **](#quote-form)\n\n![](/template/ooitech/assets/img/icon/quote.svg)\n\nA man with a big soul. Thank you very much for your visit Mr Wu. Thank you very much for the services provided in installing equipment and training my students. The kindest person and professional in his field\n\n![](https://cdn.ooitech.com/runtime/image/w800_h600_fitblur_v2_2026041716444445.webp)\n\n### Jizzakh Polytechnic Institute\n\n![](/template/ooitech/assets/img/icon/quote.svg)\n\nThanks to Ooitech for providing the fully automated production equipment—your installation and after-sales service have been excellent.\n\n![](https://cdn.ooitech.com/runtime/image/w800_h600_fitblur_v2_2026041720921238.webp)\n\n### Amjad\n\n![](/template/ooitech/assets/img/icon/quote.svg)\n\nThanks to Ooitech for providing highly suitable BC solar cell experimental equipment.\n\n![](https://cdn.ooitech.com/runtime/image/w800_h600_fitblur_v2_1776426122864564.webp)\n\n### KTECH\n\n![](/template/ooitech/assets/img/icon/quote.svg)\n\nThank you again so much again for the very big big help for improving and fixing the factory and also teaching the workers how to use the machines\n\n![](https://cdn.ooitech.com/runtime/image/w800_h600_fitblur_v2_1757479675272137.webp)\n\n### Mark\n\nBIPV Philippines\n\n## Our Latest Products\n\n![Wire Drawing Machine for Solar Ribbon Production Line](https://cdn.ooitech.com/runtime/image/w800_h600_fitblur_v2_2026051187922761.webp)\n\n- [** ooitech](/wire-drawing-machine-for-solar-ribbon-production-line.html)\n- [** 221](/wire-drawing-machine-for-solar-ribbon-production-line.html)\n\n### Wire Drawing Machine for Solar Ribbon Production Line\n\nProfessional intermediate wire drawing machine for solar ribbon production line, featuring four-axis horizontal design, copper wire drawing from 3.2mm to 0.6mm with high-speed 1800m/min performance and WF650 plum-blossom spool take-up system.\n\n![Robot String Cell Layup Machine  | Automated Solar Module Layup System - Ooitech](https://cdn.ooitech.com/runtime/image/w800_h600_fitblur_v2_1774338062497258.webp)\n\n- [** Rachael](/robot-string-cell-layup-machine-hs-pbr-automated-solar-module-layup-system-ooitech.html)\n- [** 67090](/robot-string-cell-layup-machine-hs-pbr-automated-solar-module-layup-system-ooitech.html)\n\n### Robot String Cell Layup Machine | Automated Solar Module Layup System - Ooitech\n\nOoitech HS-PBR Robot String Cell Layup Machine delivers high-precision automated string cell arrangement with ±0.3mm accuracy and ≤5s cycle time per string. Features CCD image system, robotic string handling, and compatibility with 60/72 cell, half-cell,\n\n![Automatic Layup & Bussing Integrated Machine SAW-100A | Solar Panel Production Equipment | Ooitech](https://cdn.ooitech.com/runtime/image/w800_h600_fitblur_v2_1774349342486074.webp)\n\n- [** Rachael](/automatic-layup-and-bussing-integrated-machine-saw-100a-solar-panel-production-equipment-ooitech.html)\n- [** 19190](/automatic-layup-and-bussing-integrated-machine-saw-100a-solar-panel-production-equipment-ooitech.html)\n\n### Automatic Layup & Bussing Integrated Machine SAW-100A | Solar Panel Production Equipment | Ooitech\n\nOoitech SAW-100A Automatic Layup & Bussing Integrated Machine delivers high-efficiency cell string layup and terminal busbar welding with high frequency electromagnetic soldering, mechanical and fiber optic positioning, and capacity up to 15S per grou\n\n![SC-20P BC Cell Laser Cutting Machine with Automatic Protective Paper Cutting and Stacking](https://cdn.ooitech.com/runtime/image/w800_h600_fitblur_v2_1772440338787287.webp)\n\n- [** ooitech](/SC-20P-Automatic-Solar-Cell-Laser-Cutting-Machine-High-Precision-BC-Cell-Processing-Equipment.html)\n- [** 20216](/SC-20P-Automatic-Solar-Cell-Laser-Cutting-Machine-High-Precision-BC-Cell-Processing-Equipment.html)\n\n### SC-20P BC Cell Laser Cutting Machine with Automatic Protective Paper Cutting and Stacking\n\nSC-20P is an upgraded laser cutter based on SC-20A, designed for BC cells. 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Features 2 or 4 tape heads, cycle time ≤25s, ±2mm accuracy, MES compatible, fully automatic operation for solar panel production lines.\n",
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