What Is PID in Solar Panels? Potential Induced Degradation Explained

Learn what PID means, why it can affect solar module performance, and why PID resistance is important for long-term PV system reliability.

PID is an undesirable effect on of some solar modules. The factors that can cause PID include voltage, heat and humidity and most solar modules are exposed to the combination of these factors during their working life. Nevertheless the PID effect does not occur on all or even a majority of solar modules.

Potential Induced Degradation, as the name implies, can occur when the module’s voltage potential and leakage current drive ion mobility within the module between the semiconductor material and other elements of the module (e.g. glass, mount and frame), thus causing the module’s power output capacity to degrade, in some cases significantly. PID reduces both the module’s maximum power point (MPP) and its open circuit voltage (Voc) along with a reduction in shunt resistance.

The solar electric power system and surrounding install environment interact to cause PID. As the install environment cannot be changed, the easiest way to avoid PID damage to the panel is to chose a solar panel who via manufacturing quality has inbuilt PID resistance. The choice of glass, encapsulation, and diffusion barriers have all been shown to have an impact on PID. For the front glass several studies have shown sodium to exhibit a causative factor.

So in short quality panels with solid encapsulation and diffusion barriers seem to offer a better long term protection against PID damage.Mysolar panels such as our new NEON module in past PID tests via Fraunhofer Institute and TUV have had minimal degradation after extreme PID tests and achieved a PASS ranking.

PID in solar panels by Mamibot Mysolar Knowledge center

About Mysolar

Mysolar is a Mamibot (with its headquarters based in USA) company and sub-brand, a manufacturer and factory specialized in designing and manufacturing solar panels with the most the-state-of-the-art technology and the highest level of craftsmanship. 

Mysolar aims to provide tier 1 solar panels and build itself tier 1 solar module manufacturer.

Mysolar has a team of the-most-experienced engineers with more than 15 years in Solar PV manufacturing, the strictest quality control team who averagely worked more than 10 years in Solar Panel production, the most client-oriented and professional sales team who know the art to provide proper solutions and answers to customers and the most dedicated R&D masters who can bring the latest cost-effective and high-efficient solar modules to the market. 

Mysolar produces truly wide range of high-level solar panels including standard solar modules with both poly and/or mono cells, super efficient PERC solar panels in both mono and poly crystalline, super cost-effective poly and/or mono solar panels with half cells.

We believe that we are rewriting the history of  energy consumption way and we are doing more to build a cleaner and more comfortable world.

Mysolar is a Mamibot company and brand of solar power products including solar modules/panels, solar inverters, residential solar system and commercial solar power plants. It aims to build Mysolar as tier 1 brand solar panel manufacturer worldwide. Solar panel manufacturer, solar module factory|太阳能组件制造商|ソーラーパネルメーカー、ソーラーモジュール工場|Producent paneli słonecznych, fabryka modułów słonecznych|Hersteller von Solarmodulen, Fabrik für Solarmodule|Производитель солнечных панелей, завод солнечных модулей|Fabricant de panneaux solaires, usine de modules solaires|Solpanel producent, solmodul fabrik|태양 전지 패널 제조 업체, 태양 전지 모듈 공장|Výrobce solárních panelů, továrna na solární moduly|Fabrikant van zonnepanelen, fabriek van zonnemodules|Fabricante de painel solar, fábrica de módulos solares|Výrobca solárnych panelov, továreň na solárne moduly|ผู้ผลิตแผงโซลาร์เซลล์, โรงงานโมดูลพลังงานแสงอาทิตย์|Güneş paneli üreticisi, güneş modülü fabrikası|Виробник сонячних панелей, завод сонячних модулів|Κατασκευαστής ηλιακών συλλεκτών, εργοστάσιο ηλιακών μονάδων|Napelem gyártója, napelemmodul gyár|Produttore di pannelli solari, fabbrica di moduli solari|Nhà sản xuất bảng điều khiển năng lượng mặt trời, nhà máy mô-đun năng lượng mặt trời|مصنع الألواح الشمسية ومصنع للطاقة الشمسية|