Knowing the size of the solar panel, how do you calculate the power of the solar panel?

Firstly, we should know the Standard Test Conditions of solar panels, STC (Standard Test Conditions), which indicates the industry-wide Standard for the performance of photovoltaic modules. The specified temperature is 25°C (laboratory data may be slightly different from outdoor data), and the solar irradiance is 1000W/㎡. AM 1.5 (AM stands for air mass, the thickness of the atmosphere. At the equator, the air quality is 1; in Europe, it's about 1.5.) How do you test the power of a solar panel accurately?

With that in mind, let's go straight to a simple formula:

Estimated solar panel power = surface area [length (cm)* width (cm)] *0.1* conversion efficiency

6d7f7471423f017436541761c292170dAs mentioned before, the conversion efficiency of single crystal in mass production is about 19-20%, and the calculated value is about 19%. The conversion efficiency of polycrystalline is 17-19%, and the calculated value is generally about 18%. The conversion efficiency of Sunpowe is 21-22%, and the value is generally about 21% (the actual conversion efficiency shall prevail).

According to the above formula, the general value will be greater than the normal solar panel and pv cable 6mm2 power. Why? Yesterday we talked about solar panels with edges. Kopp: Why do solar panels have edges? Solar panels generate electricity mainly through the middle of the solar cell, so the solar panel left the edge is not electricity. To sum up, the power generated by a solar panel is actually the power of the cell inside, and another formula can be extended:

Estimated solar panel power = surface area of a single cell [length (cm)* width (cm)] *0.1* conversion efficiency * Number of cells (inside the solar panel), Generally this calculation is relatively accurate, some may have some losses in the production process, about 5% (depending on whether there is wire). You can use these two methods to figure out if the solar panels in your home are of this value.

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