Pv Solar Panels Ptc Ratings

Their ptc ratings varied from 217 1 watts ptc stc 0 835 to 239 8 watts ptc stc 0 922 the canadian solar panel referenced above is at the high end of the scale ptc stc 0 919 it s important to note what the ptc testing reveals not all panels with the same stc rating perform the same.

Pv solar panels ptc ratings.

Each pv panel is rated at 215 watts under stc conditions and 187 watts under ptc conditions. How much energy does a solar panel produce. The ptc of solar panels with stc rating of 260 watts varies in the gosolarcalifornia table. As the panel heats up as they all do in the real world its output goes down.

The ptc rating represents a more real life condition of 1 000 watts per square meter solar irradiance 1 5 air mass and 20 degrees c. Thus the output for each solar panel in your array would. What are solar panel ptc ratings. The pv panels in my system are made by the rec group the model is rec215ae us.

Pv panels nominal ratings and real production. Ambient temperature at 10 meters above ground level and wind speed of 1 meter. If you want to know how photovoltaic panels will perform in the real world look for their ptc ratings. Ptc power rating power ratings measure a solar panel s power output in watts.

In the 1990s the national renewable energy laboratory nrel developed a set of pv test. Stc stands for standard test conditions. The stc and ptc ratings of solar panels are one of the ways of comparing the performance of one brand and or type of solar panel to another. The percentage drop off depends largely on the type of solar panel materials used and the manufacturer.

5 hours x 290 watts an example wattage of a premium solar panel 1 450 watts hours or roughly 1 5 kilowatt hours kwh. Ptc is an acronym for pv usa test conditions which were developed at the pv usa test site at the university of davis california. They are very important when more than one solar panel is to be used together in an array. Because the stc rating is a measurement calculated under ideal laboratory conditions it s not always a useful metric for designing your system.

For the sake of example if you are getting 5 hours of direct sunlight per day in a sunny state like california you can calculate your solar panel output this way. Meaning the normal expected pv condition expected on a utility scale project. So what is ptc rating on a solar module and how is it used. The jinko solar jkm260p 60 watts polycrystalline module has a ptc rating of 238 2 watts and an stc rating of 260 watts.

Every panel is assigned a nameplate power output value which is measured using stc standard test conditions.