Panasonic HIT photovoltaic cells demonstrate high PID resistance

Sep 19, 2012

Panasonic Corporation today announced that its HIT photovoltaic module's high-level of resistance to potential induced degradation (PID) has been verified by the results of tests conducted within and outside the company. The test conditions set by the third party organization were very stringent among those applied for various PID tests reported by several organizations. The successful passing of such a severe endurance test has confirmed the high quality and high reliability of Panasonic HIT modules.

PID is a phenomenon in which power output of photovoltaic modules is reduced when they are subjected to external factors such as high temperature and humidity, under the condition that a high voltage is applied across the internal circuits () and the grounded frame. PID can occur in high-temperature and high-humidity environments, where the system voltage is high.

The following facts and the verification results obtained both within and outside the company demonstrate that the HIT photovoltaic cells are extremely resistant to PID.

  • With respect to conventional -based photovoltaic cells, the fact that the insulating layer on a cell surface takes charge is thought to be a direct cause of PID. However, in the case of HIT photovoltaic cells, both surfaces are transparent conductive layers with no insulating layers used. Therefore, no PID is thought to occur.
  • No incidences of PID have been reported from the European, U.S., or Japanese markets.
  • Two or more models of HIT photovoltaic modules were tested within and outside the company under multiple sets of conditions. The results showed no degradation in their characteristics.
  • During one of the third-party tests carried out by Chemitox Inc., HIT modules were subjected to 1,000 volts for 96 hours at a temperature of 60 degrees Celsius with 85% . Panasonic HIT exhibited no sign of degradation under such conditions, which are extremely stringent compared to other third-party tests whose results are publicly available.
  • Panasonic intends to accelerate development and commercialization of photovoltaic cells with high quality and high reliability and to work on expanding the business globally.

Explore further: Mechanism for aprotic sodium-air batteries

Related Stories

Genetic test improves artificial fertilization

Mar 27, 2008

Polar body diagnosis can make artificial fertilization more successful, according to Katrin and Hans van der Ven and Markus Montag of Bonn University Clinic, writing in the current edition of Deutsches Ärzteblatt International ...

Anti-aging elixir for solar cells

Jul 03, 2012

Photovoltaic modules deliver power without risks to the environment and climate. But solar-power is expensive. Therefore, it is imperative that the modules last as long as possible, 25 years or more. Fraunhofer ...

Recommended for you

Mechanism for aprotic sodium-air batteries

8 hours ago

The automobile industry has been interested in finding batteries that allow electric cars to travel at a comparable distance to gas-powered cars. Currently, electric cars use a lithium ion battery, but there ...

Recycling nuclear waste via advanced reactor design

May 28, 2015

An advanced nuclear reactor under development by Hitachi could help solve the nuclear waste problem, and University of Michigan researchers were involved in verifying its safe performance through computer ...

A super cool roof solution to being hot in the city

May 28, 2015

Sydney materials scientists are claiming a breakthrough in cool roof technology with a surface they've developed that will stay cooler than the ambient air temperature, even under the mid-summer Australian ...

User comments : 0

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.