Impact of Dirty Solar Panels When sunlight hits a solar cell, it excites the electrons in the semiconductor material, and it’s this energy that can be captured as electricity. If the cells aren’t clean, then less sunlight can be absorbed and less electricity is generated. Related Please Share This Share this content Opens in a new window Facebook Opens in a new window WhatsApp You Might Also Like Dirty solar panels can lead to 50% Inefficiency February 5, 2025 Why is it important to wash the solar panels? February 10, 2024 Improve performance by up to 20% February 12, 2024