What is PTC? PTC is an acronym for Performance Test Conditions and is a US-standard that was developped at the University of Davis, California. As compared to STC, PTC is a more real-world approach to measure the actual performance of a solar cell. It specifies  an irradiance of 1000 W/m2 with an air mass 1.5 (AM1.5) spectrum and [...]

What is STC? The electric output performance of crystalline silicon and thin film PV modules are generally measured under standard test conditions (STC), ensuring a relatively independent comparison and output evaluation of different solar PV modules. STC is and industry-wide standard to indicate the performance of PV modules and specifies a temperature of 25 °C and an irradiance of 1000 [...]