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OriSolar Pty, Ltd,.

Preserve the power of your solar panels

Potential Induced Degradation (PID) is an performance accelerated degradation phenomenon in photovoltaic modules, caused by so-called ‘stray current’. This effect may cause power loss of up to 80% . 
PID, as the definition implies, occurs when the PV modules voltage potential and leakage current drive ion mobility within the PV 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. The ion mobility accelerates with humidity, high temperature and voltage  potential. 

PID is The No. 1 Risk of PV Projects Financing

The Causes of PID: Potential Induced Degradation, as the definition implies, occurs when the PV modules voltage potential and leakage current drive ion mobility within the PV 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. The PID accelerates with High Voltage / High Humidity / High Temperature.
In most cases, PV modules have a negative potential to earth, and an equally high negative voltage between the cells and the aluminum frame. As a result an electric field is created, causing electrons migration through the aluminum frame, and creating a current leakage.

How can PID be detected ? 

PID detection is the main issue in the treatment of PID.

There are different methods, physical and theoretical, providing reliable information on PID affect.

  1.  IV_Curve 

  2. Open Circuit Voltage (VOC)

  3. Infrared (IR) or Thermographic

  4. EL imaging

  • IV_Curve

The typical test to know if a module is free of PID is to measure its IV (current–voltage) characteristic with an electronic tracer.

The shape of the IV_curve can show the presence of anomalies in the characteristic of the module, as can be seen the below IV_Curve test.

 In the below IV_Curve test, a 20 modules string was measured. The modules on the “+” side of the string (modules 1 & 2) are with the expected curve and characteristic, yet the modules on the “-“ side of the string are showing clear degradation caused by PID.

  • Open Circuit Voltage (VOC)

This method using a voltmeter to measures the open circuit voltage of the PV modules. If a panel is affected by PID its VOC will be likely lower than the expected one. This is since the reduction of shunt resistance can reduce the open circuit voltage. This method works well when PID is high. Otherwise voltage reduction may be not distinguished.

At the graph below VOC of 20 solar modules was measured at the same time and date both at 2013 and 2016. It is clear that at 2013 the voltage on all 20 panels was almost the same, while in 2016 part of the modules produced much lower voltage. That points to the existence of PID.

  • Infrared (IR) or Thermographic

This method uses the fact that PID-affected cells have higher temperatures than the neighbor cells free of PID. If the panel does not affected by PID, all its cells are almost at the same temperature. The imaging with infrared camera (IR camera) allows detecting “ill” cells, as is shown on the picture below. The darker zones have higher temperature and obviously are affected by PID

  • EL imaging

Electroluminescence (EL) is an optical and electrical phenomenon in which a material emits light in response to an electric current. The higher the current - the brighter the light. EL imaging is performed by special camera at the near infra-red zone. The pictures below show PID affect dynamic. Dark colored cells indicates PID effect, light color indicates “healthy” cells.

OriSolar PTY LTD already have several success stories cross worldwide customers when we success to improve 12-30% of solar panel performance. 
Many of our customers used our solution for preventing the PID from "day 0" and as well as restoring PID problems.
We believe that our unique solution can provide you or to your customers high business value by restoring the cells productivity and increasing the efficiency of cells within 40 days.
OriSolar can help you to test your PID status and to offer very attractive business model that will not require your extra investment
Anti PID - Solar panels performance improvement

PID Solution

Our OriSolar innovative Anti PID solution is regenerating current back to the panels and restoring the cells productivity overnight. OriSolar Anti PID increases the efficiency of solar panels cells within 40 days.

What PID "Free" means ?

Solar power in Australia is a fast growing industry. As of March 2019, Australia's over 2 million solar PV installations had a combined capacity of 12,035 MW photovoltaic (PV) solar power, of which 4,068 MW were installed in the preceding 12 months. In 2019, 59 solar PV projects with a combined capacity of 2,881 MW were either under construction, constructed or due to start construction having reached financial closure. Solar accounted for 5.2% (or 11.7 TWh) of Australia's total electrical energy production (227.8 TWh) in 2018. 
Potential Induced Degradation (PID) is an performance accelerated degradation phenomenon in photovoltaic modules, caused by so-called ‘stray current’. This effect may cause power loss of up to 80 percent. 
Potential Induced Degradation, as the definition implies, occurs when the PV modules voltage potential and leakage current drive ion mobility within the PV module between the semiconductor material and other elements of the solar panels module (e.g. glass, mount and frame) thus causing the module’s power output capacity to degrade. The ion mobility accelerates with humidity, high temperature and voltage potential. 

PID affects all solar panels, the PN junction of the cell is destroyed, over time making the cells less productive, less efficient.

What solar panels manufactures say about PID ? 

Not a problem with our modules! Just about every module manufacturer has publicized this phrase in one form or another. 
For us, PID is a thing of the past! We’ve got the problem under control. 
Our modules are “PID free” and here’s the certificate to show it !  

In making these statements, manufacturers companies are relying on self-chosen test methods and pass criteria. Solar panels are considered to be ‘PID free’ when they pass the IEC 62804 standard test. This test is performed under following basic conditions:

  • Module-rated system voltage and polarities 

  • Chamber air temperature 60°C ± 2°C 

  • Chamber relative humidity 85% ± 5% 

  • Test duration of 96 hours at above conditions

Under the IEC 62804 standard, modules will be deemed to be “PID-free” (pass criteria) if power loss is less than 5% and there is no evidence of any major defect. So to be clear, there is no solar panels that are totally ‘PID’ free.  

OriSolar Anti PID increases the efficiency of solar panels cells within 40 days. And the best part, Anti PID is a proven cost efficient solution which can enhance the efficiency of the cells by up to 95% OriSolar, 

About Us

OriSolar Pty, Ltd,.

Preserve your solar panels power 

OriSolar PTY LTD is an Australian High-Tech company expert in Preventing and Restoring PV performance degradation caused by Potential Induced Degradation (PID) phenomenon.

OriSolar Pty LTD have very unique solution to improve commercials, utilities and residential solar system performance to accelerate your investment, by preventing and restoring PV panels cells from PID problems. 

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OriSolar Pty, Ltd,.

For more information about PID problem and how to restore your solar panel performance please contact

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