Solar Shading Loss Calculator
Calculate energy production loss due to shading on solar panels
About this calculator
The Solar Shading Loss Calculator determines how much energy production your solar panels lose due to shadows from trees, buildings, or other obstructions. Shading can significantly reduce solar panel efficiency, with even partial shading affecting entire panel strings. This tool helps homeowners and installers quantify potential losses, optimize panel placement, and make informed decisions about system design to maximize energy output and return on investment.
How to use
Enter your solar panel specifications including total capacity, shaded area percentage, and daily shading duration. Input your location's average sun hours and current energy production rates. The calculator will analyze the shading impact and display your estimated energy losses in kilowatt-hours and dollar amounts annually.
Frequently asked questions
How much can shading reduce solar panel output?
Even 10% shading can reduce panel output by 50% or more due to series wiring in solar panels.
What causes the most shading problems?
Trees, chimneys, neighboring buildings, and roof equipment are the most common sources of problematic solar panel shading.
Can partial shading affect unshaded panels?
Yes, panels wired in series can have their entire string's output reduced by shading on just one panel.