The solar panel power is greater than the rated power

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4 FAQs about The solar panel power is greater than the rated power

Why do some solar panels have a high power output rating?

Some panels' high power output rating is due to their larger physical size rather than high efficiency. If two solar panels have 20% efficiency ratings, but one has a power output rating of 350 watts and the other is rated at 400 watts, all that means is that the 400-watt panel is about 14% larger than the 350-watt panel.

What is the efficiency rating of a solar panel?

Most solar panels have an efficiency rating between 17%-23%. A solar panel with a 21% efficiency rating means it converts 21% of the sun's energy striking it into electricity. Do not confuse the efficiency rating with the rated output. A 23% efficiency rating does not mean the panel will only produce 23% of its rated output in watts.

Is a 400 watt solar panel bigger than a 350 watt panel?

If two solar panels have 20% efficiency ratings, but one has a power output rating of 350 watts and the other is rated at 400 watts, all that means is that the 400-watt panel is about 14% larger than the 350-watt panel. You'll get more power out of the 400-watt panel, but only because it takes up more space on your roof.

Why do solar panels not produce rated output?

A poorly made solar panel will be susceptible to heat even if the temperature is not that high. If the modules get too hot the output could drop by up to 10%. The bottom line is there are a lot of reasons why solar panels do not produce their rated output. But knowing why this happens is critical in helping you get ready and take remedial steps.

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