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"However, dirt will tend to accumulate in the bottom corners of the panels and as a precaution we recommend the panels should be cleaned every two to five years. This will ensure efficiency is maintained and output is not reduced. Dirt on the glass covering the solar cells will absorb sunlight and as a result less light will penetrate through to the solar cells."
"However, dirt will tend to accumulate in the bottom corners of the panels and as a precaution we recommend the panels should be cleaned every two to five years. This will ensure efficiency is maintained and output is not reduced. Dirt on the glass covering the solar cells will absorb sunlight and as a result less light will penetrate through to the solar cells."