A solar panel can lose more than half its efficiency when dirt blocks sunlight.
The Apple Store, Union Square, SF
The entire roof is a solar. It supplies about 10% of the store's energy use. LightStream gets to clean it! May 16, 2016.
Solar Panel Cleaning? Our parents didn’t tell us about this one! Solar Panels need light. When dirt blocks light, energy production will fall. See our Solar Panel Cleaning FAQ for information on how we clean solar panels and how often they need cleaning.