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How to Know if Solar Panels Need Cleaning After a Storm?

April 5, 2026

Quick Answer

Check the solar panel's performance after a storm. If the system's output is significantly lower than usual, it may be due to dirt, debris, or water on the panels. Inspect the panels visually for any signs of damage or blockages.

Assessing the Need for Cleaning

After a storm, inspect your solar panels for visible debris, dirt, or water spots. Look for any signs of damage to the panels, mounting hardware, or electrical connections. Check the system’s monitoring software or app for any performance anomalies, such as reduced energy output or unusual error messages.

Visual Inspection Techniques

For a more thorough inspection, use a ladder or elevated platform to get a closer look at the panels. Check the panels’ surface for any dirt, dust, or debris accumulation. Use a soft-bristled brush to gently sweep away any loose debris. If you notice any stubborn stains or water spots, mix a solution of warm water and mild dish soap, and use a soft cloth to gently wipe the panels clean.

Cleaning Techniques and Safety Precautions

When cleaning solar panels, always use a soft-bristled brush or a microfiber cloth to avoid scratching the surface. Avoid using high-pressure washes, abrasive cleaners, or strong chemicals, which can damage the panels or compromise their electrical performance. When working at heights, ensure you have proper ladder safety and always maintain three points of contact with the ladder or platform. If you’re unsure about cleaning your solar panels or if you notice any damage, consult the manufacturer’s instructions or contact a professional solar installer for assistance.

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