15 May 2012，Gintech launches its PID-free solution at SNEC 2012
Solar cell manufacturer Gintech Energy Corporation has announced its PID (Potential Induced Degradation) free solution at SNEC 2012 this week in Shanghai, New International Expo Center. PID-free is regarded as one of the solutions that could prevent undesired power leakage caused at high system voltages.
Gintech states its solar cells have not only passed the PID tests by its high-end European customers, but also by PI-Berlin. PV Evolution Labs also announced the launch of its new PID certification program last week.
Gintech’s current product series includes Premium Hybrid Quasi-Mono Series, High Power Douro Series, and Colorful Phoenix Series.
11 July 2012, 12:19
• In News, PV Modules
Kyocera modules pass Fraunhofer PID test
Fraunhofer CSP tested modules for potential induced degradation. Image: Kyocera
Kyocera’s PV modules have passed the Fraunhofer Center for Silicon Photovoltaics CSP’s PID test, the company has announced. The potential induced degradation (PID) test subjects the modules to high voltage stress to test the performance of individual modules, which can be negatively affected by PID, consequently affecting the power output of the entire system. Fraunhofer CSP has anonymously tested PV modules and Kyocera was among four types that passed the test, not showing degradation.
“As a pioneer in the industry Kyocera has been involved in R&D and manufacturing of solar power generating systems for more than 35 years, and in that time we have developed numerous innovations and manufacturing technologies to ensure the high quality and long-term durability of our products,” Tatsumi Maeda, general manager of the Kyocera Corporate Solar Energy Group, said. “With Kyocera's solar modules having been the first in the world to be certified by TUV Rheinland’s Long-Term Sequential Test, the Fraunhofer CSP test results further demonstrate the 2 industry-leading technology and reliable performance of Kyocera modules.”
24 July 2012, 博客消息
Two PIDs, but not from the same pod!
It would seem the quality and performance bragging rights have also migrated to cover the phenomenon known as potential induced degradation (PID). Image: Q.CELLS
Competition in the PV module bragging rights contest doesn’t stop at conversion efficiencies. Over the last few years there has been a race to provide better performance and improved manufacturer warranties. This has also led to a range of tougher and extended module testing that exceeds conventional testing and certification standards.
It would seem the quality and performance bragging rights have also migrated to cover the phenomenon known as potential-induced degradation (PID).
PID is regarded as a key problem for monocrystalline cells and modules as it reduces the high-level performance of the module.
Canadian Solar has just claimed that it was ‘among the first providers’ to have passed two high-voltage endurance tests. The Photovoltaic Institute (PI) Berlin has tested the CS6-poly-series module, while the PV Evolution Labs has tested the CS5-mono-series and the CS6-poly-series modules for PID characteristics.
According to Canadian Solar, the standard set by the PI Berlin, TÜV Rhineland and the VDE (Association for Electrical, Electronic & Information Technologies) for PID testing meant that its modules were exposed to a negative socket voltage of 1,000 volts.
While in this state, the grounded module front was covered in either aluminium foil or a layer of water. The-before-and-after performance rate was measured with a flasher under standard test conditions (STC), providing the company the top rating, PID Class A, at PI Berlin.
To provide added assurance, Canadian Solar asked PI Berlin to double the standard stress time for what it said was ‘the ultimate quality assurance.’
The standard test actually runs for a week; therefore, PI Berlin undertook the test for two weeks.
Now enter Q-Cells, which has also run PID tests on its modules, though it didn’t state which ones were tested. Q-Cells used TÜV Rheinland testing institute but according to the company went through a ‘fourfold’ PID test. Therefore the test lasted four weeks instead of the usual one week.
Even under this test, Q-Cells said that none of the solar modules displayed a decline in performance by accuracy of measurement (5% degradation or less), which proved the modules were PID resistant.
However, part of the problem in ‘proving’ quality, especially in respect to PID testing is that there is not an industry-wide acknowledged testing standard. In the case of Canadian Solar PID tests, these were said to have been developed in collaboration with PV Evolution.
Q-Cells' series of module tests were conducted by TÜV Rheinland and Fraunhofer CSP to those organizations' methodologies.
Both press releases from the module manufacturers were obviously designed to provide customers with the assurances that their products performed excellently and provided confidence in their long-life capabilities.
However, once again we don’t have a situation where such tests provide an apple-to-apple comparison. They're certainly not two peas from the same pod.
Fraunhofer CSP confirms that Q-Cells modules provide unending PID protection
The chart shows the 13 modules tested by Q-Cells has claimed that as part of a cross-sectional study with the Fraunhofer Centre for Silicon PV (CSP) in Halle, Germany, its solar modules reliably prevent the risk of solar module output loss due to potential induced degradation (PID), keeping their full output.
Fraunhofer CSP exposed 13 types of modules from various, and supposedly well-known manufacturers, to an augmented PID test. All modules had a glass-foil construction with 60, six inch polycrystalline solar cells. Q-Cells noted that of the 13 modules tested, nine modules showed an output loss - partially in excess of 90%, and, on average, a nominal output drop of 56%. The remaining four modules were the only types to not show signs of degradation with Q-Cell’s modules making it through with no output loss compared to their initial specifications.
“We are pleased with the positive results, which reflect on our long-term experience and quality claim”, said Karl Heinz Küsters, head of research and development at Q.CELLS. “Thanks to intense research activities, Q.CELLS found a solution for the PID phenomena early on and today provides a true, measurable and sustainable edge in quality to its customers by secure yields without power loss.”