Solar Panel Stc Rating

Sunpower solar panels offer the industry best degradation rate at 0 32 year.

Solar panel stc rating.

Typically degradation rates for quality panels are below 1 year. In other words the stc rating of a solar panel is its output capacity under ideal conditions. For instance a canadian solar 180w panel is 180w stc. And as panels cool their output goes up this type of power drop off happens for all panels.

As the panel heats up as they all do in the real world its output drops. Solar panel degradation rate the solar energy degradation rate measures the rate at which a panel s power output decreases over time. Standard test conditions stc stc is the set of criteria that a solar panel is tested at. It is thus the name plate value of the solar panel and is given as the wattage of the module.

Ideally you want this number to be as low as possible. When we talk about solar panel ratings we most often talk about wattage. Stc in an acronym for factory standard test conditions which is 1 000 watts per square meter solar irradiance 1 5 air mass and a 25 degrees c. This is its rated power under standard test conditions stc.

Since voltage and current change based on temperature and intensity of light among other criteria all solar panels are tested to the same standard test conditions. As you can see the canadian solar 260 watt polycrystalline module has a ptc rating of 239 1 watts and an stc rating of 260 watts. An array made from 10 of these panels would be 1 800w stc. The stc rating of a solar module is determined by carefully controlling light and temperature in the testing environment.

Every solar panel has a published power rating. Stc is basically perfectly sunny skies and perfect weather. The stc rating is always the highest rating. Stc is an industry wide standard to indicate the performance of pv modules and specifies a cell temperature of 25 c and an irradiance of 1000 w m2 with an air mass 1 5 am1 5 spectrum.

If you add up the rated power for all of the panels then you get the peak rating of a solar system. This is because it rates solar panels in terms of the instantaneous power that they produce under a set of ideal conditions.