Quick Answer
For optimal energy production during the summer solstice, solar panels should be angled at around 30-40 degrees. This tilt allows for the best balance between capturing direct sunlight and minimizing shading from surrounding obstacles.
Summer Solstice Tilt Calculation
To determine the ideal tilt angle for your location during the summer solstice, you can use the following formula: tilt angle (in degrees) = latitude - 15. For example, if you live at a latitude of 40 degrees, the ideal tilt angle would be 40 - 15 = 25 degrees. However, this is a general guideline and might need to be adjusted based on your specific location’s climate and solar radiation patterns.
Accounting for Local Shading
When choosing the optimal tilt angle, it’s essential to consider the potential for shading from nearby obstacles such as trees, buildings, or power lines. A tilt angle of 30-40 degrees can help reduce shading from these sources, but you may need to adjust this angle further to accommodate your specific site conditions. To minimize shading, try to position your solar panel array so that it receives direct sunlight for at least 6 hours a day during the summer solstice.
Considerations for Tracking Systems
If you’re using a tracking system to follow the sun’s movement, you may not need to adjust the tilt angle as much. Tracking systems can help maximize energy production by adjusting the panel’s angle throughout the day to align with the sun’s position. However, even with tracking systems, it’s still essential to consider local shading and ensure that your solar panel array is positioned for optimal energy production.
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