There are advantages to having high-efficiency solar panels, especially if you have limited roof space or shading that inhibits your energy production.. Residential solar panels range from 13 to 22.8% efficiency, with most panels hovering around the 20% mark. Clicking “Get Your Estimate” submits your data to All Star Pros, which will process your data in accordance with the All Star Pros Privacy Policy. If. . Solar panel efficiency is a measurement of how much of the sun's energy a certain panel can convert into usable electricity. This is done by capturing the electrical current generated when sunshine interacts with silicon or thin film cells inside a solar panel. Efficiency is used as a standardized.
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