# Photovoltaics & Applications | Ooitech Technical Blog > Cell and module technology explained: TOPCon, BC, HJT and perovskite routes, the materials used, the machines that build them and the process behind every watt. - [All Articles](Blog.html) - [Energy Storage & Applications 4](./Energy-Storage.html) - [Photovoltaics & Applications 118](./Photovoltaics.html) - [Electrical & Fundamentals 23](./Electrical-Fundamentals.html) - [Industry & Insights 22](./Industry-Insights.html) ## Our Latest Photovoltaics & Applications ![Hybrid Contact BC Cells: What 28% Still Has to Prove](https://cdn.ooitech.com/runtime/image/w800_h600_fitblur_v2_2026101805050505.webp) - [** ooitech](./hybrid-contact-bc-cells-what-28-percent-still-has-to-prove.html) - [** 75 Views](./hybrid-contact-bc-cells-what-28-percent-still-has-to-prove.html) ### Hybrid Contact BC Cells: What 28% Still Has to Prove A cell that stacks amorphous and polysilicon contacts on one rear face. What the··· ![Flat vs Round Ribbon: Why BC Cells Break the Rule](https://cdn.ooitech.com/runtime/image/w800_h600_fitblur_v2_2026101801010101.webp) - [** ooitech](./flat-vs-round-ribbon-why-bc-cells-break-the-rule.html) - [** 80 Views](./flat-vs-round-ribbon-why-bc-cells-break-the-rule.html) ### Flat vs Round Ribbon: Why BC Cells Break the Rule Round wire won the multi-busbar era on shading. A back-contact cell has no grid ··· ![PV Ribbon Test Methods: Dimensions, Strength, Solderability](https://cdn.ooitech.com/runtime/image/w800_h600_fitblur_v2_2026101735353535.webp) - [** ooitech](./pv-ribbon-test-methods-dimensions-strength-solderability.html) - [** 87 Views](./pv-ribbon-test-methods-dimensions-strength-solderability.html) ### PV Ribbon Test Methods: Dimensions, Strength, Solderability Five groups of ribbon tests, the standards behind each one, the values most ofte··· ![Solar Cell Stringer Mechanisms: A Zone-by-Zone Guide](https://cdn.ooitech.com/runtime/image/w800_h600_fitblur_v2_2026101728282828.webp) - [** ooitech](./solar-cell-stringer-mechanisms-a-zone-by-zone-guide.html) - [** 111 Views](./solar-cell-stringer-mechanisms-a-zone-by-zone-guide.html) ### Solar Cell Stringer Mechanisms: A Zone-by-Zone Guide 105 named mechanisms in six groups: what each stringer zone does, the settings t··· ![Space Solar Cover Glass: Why Cerium, and How to Read It](https://cdn.ooitech.com/runtime/image/w800_h600_fitblur_v2_2026101712121212.webp) - [** ooitech](./space-solar-cover-glass-why-cerium-and-how-to-read-it.html) - [** 149 Views](./space-solar-cover-glass-why-cerium-and-how-to-read-it.html) ### Space Solar Cover Glass: Why Cerium, and How to Read It Space solar cells sit under cerium-doped cover glass. What cerium absorbs, how t··· ![How a Solar Panel Is Made: Every Step and Every Check](https://cdn.ooitech.com/runtime/image/w800_h600_fitblur_v2_2026101795959595.webp) - [** ooitech](./how-a-solar-panel-is-made-every-step-and-every-check.html) - [** 157 Views](./how-a-solar-panel-is-made-every-step-and-every-check.html) ### How a Solar Panel Is Made: Every Step and Every Check From incoming cells to the packed module: the phases of solar panel manufacturin··· ![Module Efficiency vs Power: Why 740 W Can Rank Below 675 W](https://cdn.ooitech.com/runtime/image/w800_h600_fitblur_v2_2026101755555555.webp) - [** ooitech](./module-efficiency-vs-power-why-740-w-can-rank-below-675-w.html) - [** 153 Views](./module-efficiency-vs-power-why-740-w-can-rank-below-675-w.html) ### Module Efficiency vs Power: Why 740 W Can Rank Below 675 W Module efficiency divides power by area, so a larger 740 W module can sit below ··· ![How PV Ribbon Is Made: Drawing, Annealing and Tinning](https://cdn.ooitech.com/runtime/image/w800_h600_fitblur_v2_2026101711111111.webp) - [** ooitech](./how-pv-ribbon-is-made-drawing-annealing-and-tinning.html) - [** 164 Views](./how-pv-ribbon-is-made-drawing-annealing-and-tinning.html) ### How PV Ribbon Is Made: Drawing, Annealing and Tinning How a PV ribbon is made, stage by stage: drawing, rolling, annealing, tinning an··· ![Laser-Cut Edges in TOPCon: Passivating the Cross-Section](https://cdn.ooitech.com/runtime/image/w800_h600_fitblur_v2_2026101624242424.webp) - [** ooitech](./laser-cut-edges-in-topcon-passivating-the-cross-section.html) - [** 157 Views](./laser-cut-edges-in-topcon-passivating-the-cross-section.html) ### Laser-Cut Edges in TOPCon: Passivating the Cross-Section A laser cut leaves bare silicon on both walls of a four-cut cell. Coating that w··· ![0BB Cell Technology: What Removing the Busbar Changes](https://cdn.ooitech.com/runtime/image/w800_h600_fitblur_v2_2026101620202020.webp) - [** ooitech](./0bb-cell-technology-what-removing-the-busbar-changes.html) - [** 167 Views](./0bb-cell-technology-what-removing-the-busbar-changes.html) ### 0BB Cell Technology: What Removing the Busbar Changes 0BB removes the busbar, and with it the pad and the placement reference the ribb··· ![0BB on Back-Contact Solar Cells: Gains and Yield Limits](https://cdn.ooitech.com/runtime/image/w800_h600_fitblur_v2_2026101619191919.webp) - [** ooitech](./0bb-on-back-contact-solar-cells-gains-and-yield-limits.html) - [** 157 Views](./0bb-on-back-contact-solar-cells-gains-and-yield-limits.html) ### 0BB on Back-Contact Solar Cells: Gains and Yield Limits 0BB replaces printed busbars with many ultra-thin wires. On back-contact cells t··· ![What a PV Ribbon Does: Three Jobs, One Trade-off](https://cdn.ooitech.com/runtime/image/w800_h600_fitblur_v2_2026101615151515.webp) - [** ooitech](./what-a-pv-ribbon-does-three-jobs-one-trade-off.html) - [** 148 Views](./what-a-pv-ribbon-does-three-jobs-one-trade-off.html) ### What a PV Ribbon Does: Three Jobs, One Trade-off A PV ribbon carries the current out of every cell, holds the cell in place and b··· - [**](/Photovoltaics.html) - [**](/Photovoltaics_3.html) ![](/template/ooitech/assets/img/shape/06.png) ![](https://cdn.ooitech.com/runtime/image/w800_h700_fitblur_v2_w800_h700_fitblur_v2_1757399770541443.webp) ### Request A Quote All uploads are secure and confidential. ## We deliver expertise you can trust our service Direct-from-Factory Equipment. ![](/template/ooitech/assets/img/icon/money-2.svg) ### Cost-Effective Advantages We deliver exceptional value, maximizing results while optimizing budgets for clients. ![](/template/ooitech/assets/img/icon/staff.svg) ### Our Experience Team Our skilled professionals specialize in innovative solutions and tailored strategies. ![](/template/ooitech/assets/img/icon/certified.svg) ### 15+ Years Industry Experience Deep expertise ensures reliable, trend-aware, and proven outcomes for success. ![](https://cdn.ooitech.com/static/upload/image/20250910/1757477357667605.webp ) ![](https://cdn.ooitech.com/static/upload/image/20250910/1757477724911512.webp) ![](/template/ooitech/assets/img/shape/06.png) ## What Our Client Say's about us Client 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) ![](/template/ooitech/assets/img/icon/quote.svg) Thanks to Ooitech for providing highly suitable BC solar cell experimental equipment. ![](https://cdn.ooitech.com/runtime/image/w800_h600_fitblur_v2_1776426122864564.webp) ### KTECH ![](/template/ooitech/assets/img/icon/quote.svg) Thanks to Ooitech for providing the fully automated production equipment—your installation and after-sales service have been excellent. ![](https://cdn.ooitech.com/runtime/image/w800_h600_fitblur_v2_2026041720921238.webp) ### Amjad ![](/template/ooitech/assets/img/icon/quote.svg) Thank 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 ![](https://cdn.ooitech.com/runtime/image/w800_h600_fitblur_v2_1757479675272137.webp) ### Mark BIPV Philippines ![](/template/ooitech/assets/img/icon/quote.svg) thank you for ooitech's professional support and on time after service. ![](https://cdn.ooitech.com/runtime/image/w800_h600_fitblur_v2_1784509010217979.webp) ### Diarra From Africa ![](/template/ooitech/assets/img/icon/quote.svg) A 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 ![](https://cdn.ooitech.com/runtime/image/w800_h600_fitblur_v2_2026041716444445.webp) ### Jizzakh Polytechnic Institute ## Our Latest Products ![Frame Gluing & J-Box Glue Machine: 2500mm Stroke](https://cdn.ooitech.com/runtime/image/w800_h600_fitblur_v2_1774497599314364.webp) - [** Rachael](./automatic-frame-gluing-machine-and-junction-box-glue-machines-ooitech-solar-panel-production-line-equipment.html) - [** 51931](./automatic-frame-gluing-machine-and-junction-box-glue-machines-ooitech-solar-panel-production-line-equipment.html) ### Frame Gluing & J-Box Glue Machine: 2500mm Stroke Ooitech offers professional automatic frame gluing machines (SPZ-2400GS-T2-Y2) with American ARO pump and GRACO PCF system ![Solar Panel Sealant and Tape: Silicone, Butyl, PET](https://cdn.ooitech.com/runtime/image/w800_h600_fitblur_v2_2026032711586064.jpg.webp) - [** Rachael](./PV-Module-Sealant-Tape-Solutions-Essential-Components-for-Solar-Panel-Reliability.html) - [** 73369](./PV-Module-Sealant-Tape-Solutions-Essential-Components-for-Solar-Panel-Reliability.html) ### Solar Panel Sealant and Tape: Silicone, Butyl, PET Solar panel sealant and tape for module assembly: silicone frame sealant, butyl tape and busbar insulation tape, UV-resistant for 25-year outdoor exposure. ![KS-01C Junction Box Welding Machine: 16s Cycle](https://cdn.ooitech.com/runtime/image/w800_h600_fitblur_v2_1774492507915923.webp) - [** Rachael](./junction-box-welding-machine-ks-01c-automatic-solar-panel-junction-box-soldering-equipment-ooitech.html) - [** 92601](./junction-box-welding-machine-ks-01c-automatic-solar-panel-junction-box-soldering-equipment-ooitech.html) ### KS-01C Junction Box Welding Machine: 16s Cycle Ooitech KS-01C Junction Box Welding Machine features automatic hot bar tin welding and high frequency welding with CCD positioning accuracy of ±0.1mm. ![C350-CQC EVA & TPT Strip Cutting Machine: 30-80mm](https://cdn.ooitech.com/runtime/image/w800_h600_fitblur_v2_2026032714363679.webp) - [** Rachael](./ECPC-C350-CQC-Punching-and-Cutting-Machine-High-Precision-Solar-Panel-Material-Processing-Equipment.html) - [** 34821](./ECPC-C350-CQC-Punching-and-Cutting-Machine-High-Precision-Solar-Panel-Material-Processing-Equipment.html) ### C350-CQC EVA & TPT Strip Cutting Machine: 30-80mm C350-CQC punching & cutting machine – 30 pcs/min, ±0.2mm accuracy for EVA, TPT & PPE solar materials. Precision processing for busbar and ![SAW-100A Layup & Bussing Machine: ≤0.3% Breakage](https://cdn.ooitech.com/runtime/image/w800_h600_fitblur_v2_1774349342486074.webp) - [** Rachael](./automatic-layup-and-bussing-integrated-machine-saw-100a-solar-panel-production-equipment-ooitech.html) - [** 19780](./automatic-layup-and-bussing-integrated-machine-saw-100a-solar-panel-production-equipment-ooitech.html) ### SAW-100A Layup & Bussing Machine: ≤0.3% Breakage Ooitech SAW-100A Automatic Layup & Bussing Integrated Machine delivers high-efficiency cell string layup and terminal busbar welding with high ![OPT-M960B EL & VI Tester: 0.1mm/pixel, Intel i7](https://cdn.ooitech.com/runtime/image/w800_h600_fitblur_v2_1774351816741704.webp) - [** Rachael](./solar-panel-el-tester-and-vi-tester-machine-opt-m960b-m951b-m950b-ooitech-solar-module-el-testing-equipment.html) - [** 43886](./solar-panel-el-tester-and-vi-tester-machine-opt-m960b-m951b-m950b-ooitech-solar-module-el-testing-equipment.html) ### OPT-M960B EL & VI Tester: 0.1mm/pixel, Intel i7 Ooitech offers professional solar panel EL tester and VI tester machines (OPT-M960B, OPT-M951B, OPT-M950B) with SONY industrial cameras