# 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

![TOPCon UVID: Reversible and Irreversible UV Degradation](https://cdn.ooitech.com/runtime/image/w800_h600_fitblur_v2_2026101611111111.webp)

- [** ooitech](./topcon-uvid-reversible-and-irreversible-uv-degradation.html)
- [** 213 Views](./topcon-uvid-reversible-and-irreversible-uv-degradation.html)

### TOPCon UVID: Reversible and Irreversible UV Degradation

TOPCon ultraviolet-induced degradation splits into a recoverable loss and a perm···

![PV Ribbon Structure and Types: Flat, Round and Shaped](https://cdn.ooitech.com/runtime/image/w800_h600_fitblur_v2_2026101606060606.webp)

- [** ooitech](./pv-ribbon-structure-and-types-flat-round-and-shaped.html)
- [** 194 Views](./pv-ribbon-structure-and-types-flat-round-and-shaped.html)

### PV Ribbon Structure and Types: Flat, Round and Shaped

A PV ribbon is either a flat strip or a round wire. What the two geometries chan···

![PV Ribbon Materials: Copper Core, Hardness and Coating](https://cdn.ooitech.com/runtime/image/w800_h600_fitblur_v2_2026101601010101.webp)

- [** ooitech](./pv-ribbon-materials-copper-core-hardness-and-coating.html)
- [** 184 Views](./pv-ribbon-materials-copper-core-hardness-and-coating.html)

### PV Ribbon Materials: Copper Core, Hardness and Coating

A PV ribbon is a copper conductor with a solder coating. What copper grade, yiel···

![DH1000 Damp Heat Test: Failure Modes and Mechanisms](https://cdn.ooitech.com/runtime/image/w800_h600_fitblur_v2_2026101311111111.webp)

- [** Jerry](./dh1000-damp-heat-test-failure-modes-and-mechanisms.html)
- [** 137 Views](./dh1000-damp-heat-test-failure-modes-and-mechanisms.html)

### DH1000 Damp Heat Test: Failure Modes and Mechanisms

DH1000 runs 1,000 hours at 85 C and 85% RH in open circuit: what it stresses, th···

![Can I Make My Own Solar Panels at Home? What Is Actually Possible](https://cdn.ooitech.com/runtime/image/w800_h600_fitblur_v2_ooitech-paa-diy-cover-b.webp)

- [** Margret](./can-i-make-my-own-solar-panels-at-home.html)
- [** 198 Views](./can-i-make-my-own-solar-panels-at-home.html)

### Can I Make My Own Solar Panels at Home? What Is Actually Possible

You can assemble a panel at home from bought cells. You cannot make the cells. W···

![How to Manufacture a Solar Cell: Process, Machines, and Difficulty](https://cdn.ooitech.com/runtime/image/w800_h600_fitblur_v2_ooitech-paa-solarcell-cover-d.webp)

- [** Jerry](./how-to-manufacture-a-solar-cell.html)
- [** 292 Views](./how-to-manufacture-a-solar-cell.html)

### How to Manufacture a Solar Cell: Process, Machines, and Difficulty

Cell manufacturing is a different business from module assembly. The process, th···

![What Is a Solar Module Assembly Line? Stations and Flow Explained](https://cdn.ooitech.com/runtime/image/w800_h600_fitblur_v2_ooitech-paa-assemblyline-cover-b.webp)

- [** Jerry](./what-is-a-solar-module-assembly-line.html)
- [** 268 Views](./what-is-a-solar-module-assembly-line.html)

### What Is a Solar Module Assembly Line? Stations and Flow Explained

A module assembly line is a takt-driven flow, not a machine list. The stations, ···

![How Difficult Is It to Manufacture Solar Panels? An Honest Assessment](https://cdn.ooitech.com/runtime/image/w800_h600_fitblur_v2_ooitech-paa-difficulty-cover-b.webp)

- [** Jerry](./how-difficult-is-it-to-manufacture-solar-panels.html)
- [** 253 Views](./how-difficult-is-it-to-manufacture-solar-panels.html)

### How Difficult Is It to Manufacture Solar Panels? An Honest Assessment

Module assembly is the easy part. What actually defeats first-time manufacturers···

![No-Clean Halogen-Free Flux for N-Type Cells: Why Residue Decides Module Life](https://cdn.ooitech.com/runtime/image/w800_h600_fitblur_v2_ooitech-no-clean-halogen-free-flux-cover.webp)

- [** Jerry](./no-clean-halogen-free-flux-n-type-solar-cell-soldering.html)
- [** 202 Views](./no-clean-halogen-free-flux-n-type-solar-cell-soldering.html)

### No-Clean Halogen-Free Flux for N-Type Cells: Why Residue Decides Module Life

As N-type cells replaced PERC the old flux stopped being good enough. What no-cl···

![Why BC Cells Are Hard to Make: AIKO's Self-Masked Two-Step Process Explained](https://cdn.ooitech.com/runtime/image/w800_h600_fitblur_v2_ooitech-bc-cell-aiko-two-step-process-cover.webp)

- [** Jerry](./why-bc-cells-are-hard-to-make-aiko-self-masked-two-step-process.html)
- [** 248 Views](./why-bc-cells-are-hard-to-make-aiko-self-masked-two-step-process.html)

### Why BC Cells Are Hard to Make: AIKO's Self-Masked Two-Step Process Explained

BC's hardest problem is the rear: P and N passivating contacts want different pr···

![From Polysilicon to Monocrystalline: What “Semiconductor-Grade” Really Means in PV](https://cdn.ooitech.com/runtime/image/w800_h600_fitblur_v2_ooitech-polysilicon-semiconductor-grade-cover.webp)

- [** Jerry](./polysilicon-to-monocrystalline-semiconductor-grade-silicon-explained.html)
- [** 287 Views](./polysilicon-to-monocrystalline-semiconductor-grade-silicon-explained.html)

### From Polysilicon to Monocrystalline: What “Semiconductor-Grade” Really Means in PV

Solar-grade polysilicon is quoted at 6N-8N; electronic grade starts at 9N with p···

![CE Certified Solar Panel Production Line: Pre-Delivery Certification and Export Compliance](https://cdn.ooitech.com/runtime/image/w800_h600_fitblur_v2_ooitech-ce-certificate-solar-panel-production-line.webp)

- [** Margret](./ce-certification-solar-panel-production-line-export-compliance.html)
- [** 263 Views](./ce-certification-solar-panel-production-line-export-compliance.html)

### CE Certified Solar Panel Production Line: Pre-Delivery Certification and Export Compliance

CE certified solar panel production lines from Ooitech: Machinery and EMC Direct···

- [**](/Photovoltaics_2.html)
- [**](/Photovoltaics_4.html)

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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

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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

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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

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### Mark

BIPV Philippines

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thank you for ooitech's professional support and on time after service.

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### Diarra From Africa

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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)

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## Our Latest Products

![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.

![SC-10C Silicon Wafer Laser Cutting Machine](https://cdn.ooitech.com/runtime/image/w800_h600_fitblur_v2_1774340166130021.webp)

- [** ooitech](./SC-10C-Full-Automatic-Silicon-Wafer-Laser-Cutting-Machine-High-Precision-Solar-Cell-Production-Equipment.html)
- [** 30224](./SC-10C-Full-Automatic-Silicon-Wafer-Laser-Cutting-Machine-High-Precision-Solar-Cell-Production-Equipment.html)

### SC-10C Silicon Wafer Laser Cutting Machine

SC-10C Full Automatic Silicon Wafer Laser Cutting Machine by Ooitech - High-speed precision cutting equipment for solar cell production with 860PCS/H

![STW-60A Shingled String Terminal Head: 20s/String](https://cdn.ooitech.com/runtime/image/w800_h600_fitblur_v2_1774264892557837.webp)

- [** ooitech](./stw-60a-automatic-shingled-string-cell-terminal-head-welding-machine-solar-module-busbar-welding-equipment.html)
- [** 78343](./stw-60a-automatic-shingled-string-cell-terminal-head-welding-machine-solar-module-busbar-welding-equipment.html)

### STW-60A Shingled String Terminal Head: 20s/String

STW-60A automatic shingled string cell terminal head welding machine by Ooitech uses infrared heating technology to weld busbars on both positive and

![OTMT-A Sun Simulator: Class A, ≤±1% Instability](https://cdn.ooitech.com/runtime/image/w800_h600_fitblur_v2_1774513832212306.jpg)

- [** ooitech](./solar-panel-tester-sun-simulator-otmt-a-aaa-class-solar-module-iv-tester-ooitech.html)
- [** 962](./solar-panel-tester-sun-simulator-otmt-a-aaa-class-solar-module-iv-tester-ooitech.html)

### OTMT-A Sun Simulator: Class A, ≤±1% Instability

Ooitech OTMT-A Solar Panel Tester Sun Simulator is an AAA class solar module IV testing system featuring xenon lamp technology, IEC 60904-9 compliance

![Portable EL Tester: 24MP, Detects 0.2mm Cracks](https://cdn.ooitech.com/runtime/image/w800_h600_fitblur_v2_2026051214015103.webp)

- [** ooitech](./portable-hd-el-tester-for-solar-module-inspection.html)
- [** 1032](./portable-hd-el-tester-for-solar-module-inspection.html)

### Portable EL Tester: 24MP, Detects 0.2mm Cracks

Portable high definition EL tester with 24MP auto focus infrared camera for solar module electroluminescence testing

![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.