What are Standard Test Conditions (STC)

STC stands for “Standard Test Conditions” and are the industry standard for the conditions under which a solar panel are tested. By using a fixed set of conditions, all solar panels can be more accurately compared and rated against each other. There are three standard test conditions which are: 1. Temperature of the cell - 25°C. The temperature of the solar cell itself, not the temperature of the surrounding. 2. Solar Irradiance - 1000 Watts per square meter. This number refers...