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Topic: Make Solar Electric Panels and Kill Your Electricity Bill |
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jeromeprincy |
Posted: 11-Apr-20 10:04 |
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Now, we'll make a sample calculation to determine how manufacturers calculate the maximum solar panel efficiency under STC. Assume you have a 400W system with an area of 30 ft2 and you want to determine the maximum efficiency of your solar panels under STC. Your first step would be to convert the area of your panels' to units of square meters which is: 30 ft2 x 1 meter / (10.76 ft2) = 2.79 m2 (In determining the efficiency, I would personally include the dimensions of the frames in your calculations.
Although they are there for structural purposes, they are necessary components that do take up area) Now that you have your Pmax (400W), ES, γsw (1000W/m2), and Ac (2.79 m2), you can plug your numbers into the efficiency equation where all units will cancel out and then multiply the value by 100% to give you your efficiency percentage: ηmax (in percentage) = 400 W / (1000W/m2 x 2.79 m2) = 0.143 x 100 % = 14.3% This would be the maximum efficiency of your solar panel, not to be confused with the minimum that may be found on the panel's specification sheet.
So when you are determining what solar panels are right for you, think about how important the efficiency of panels are in paying a premium price. Perhaps you have a roof with a large area that would be ideal for the placement of solar panels, and therefore, lower cost and less efficient panels would work for you. If your rooftop area is limited though, you may want to determine the efficiency you will need for your panels to achieve the desired power output over a limited area.
https://healthscrutiny.com/energy-cube-system-review/ |
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