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What are the Basic Parameters of Solar Panels (or PV Modules)?

  • Source:admin
  • Time:2019-01-24
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Solar Panels (or PV Modules) have several basic parameters, rated power (Pmax), efficiency (η), open circuit voltage (Voc), short circuit current (Isc), peak voltage (Vmpp), and peak current (Impp).

 

Their definitions are as follows:

Rated power (Pmax): indicates the power generated by the maximum power point voltage when the solar panel (or PV module) is at the standard ambient temperature (STC, ie, the atmospheric mass is 1.5, ambient temperature is 25 ° C, the light radiation intensity is 1000 W/m 2 );

 

Efficiency (η): represents the photoelectric conversion efficiency of the silicon wafer inside the solar panel (or PV module), such as an efficiency of 16.5%, which means that the silicon wafer can generate 165 W of electricity per square meter;

 

Open circuit voltage (Voc): indicates the voltage across the positive and negative terminals (solar panel or PV module’s no-load voltage) when the solar panel is open at standard ambient temperature;

 

Short-circuit current (Isc): indicates the short-circuit current generated by short-circuit between the positive and negative terminals of the solar panel when the panel is at the standard ambient temperature;

 

Peak voltage (Vmpp): indicates the operating voltage of the solar panel at the maximum power point (the highest voltage in strong light) when the panel is at the standard ambient temperature;

 

Peak current (Impp): Indicates the operating current corresponding to the operating voltage of the solar panel at the maximum power point when the panel is at the standard ambient temperature.


Author: Carrie Wong

From WSL Solar Co., Ltd.

 

WSL Solar has been a quality and professional manufacturer of custom solar panels (or custom PV modules) and solar solution provider in China since 2006. With our in-house R&D team and management team for over 10 years' experience in solar industry, we are able to design and develop a customized solar module in a variety of sizes, shapes and outputs to meet our client's specific requirement, and provide solution support start from initial product development stage. For more detail, please visit https://www.wsl-solar.com/