Keeping Your Rooftop Solar Panels Clean: Why It Matters and How to Do It Right

Installing a rooftop solar system is a great investment — but like any outdoor equipment, solar panels need regular care to perform at their best. One of the simplest and most effective ways to ensure optimal energy production is by keeping your solar panels clean.

Let’s look at why cleanliness matters, how often you should clean your panels, and the safest way to do it.

1. Why Clean Solar Panels?
Dust, bird droppings, pollen, leaves, and even pollution can accumulate on your solar panels over time. This layer of grime blocks sunlight and reduces the amount of energy your system can generate.
Studies show that dirty panels can lose 10% to 25% of their efficiency — or even more in dusty areas.
Regular cleaning ensures:

Maximum sunlight absorption
Better energy output
Longer system life
Improved return on investment

2. How Often Should You Clean Them?
The frequency of cleaning depends on your location and environment:

Urban/Residential Areas: Every 3–6 months
Dusty or Industrial Zones: Every 1–2 months
Rainy Regions: Less frequent, but inspect after heavy rains for mud or debris
Near Trees or Birds: Check monthly for leaves or droppings

Tip: Monitor your solar system’s energy output. A sudden drop might indicate it’s time for a cleaning.

3. DIY vs Professional Cleaning
DIY Cleaning is safe and effective if you follow basic precautions:

Use a soft brush or sponge
Rinse with clean water (no harsh chemicals)
Avoid pressure washers that may damage the glass
Clean in the early morning or late afternoon to avoid hot panels


Important: Always prioritize safety. If your panels are on a slanted roof or hard-to-reach areas, it's best to hire professionals.
Professional Cleaning offers:

Thorough inspection of panels and mounts
Safe, specialized equipment
Added services like checking for wiring issues or loose connections

At Sherin Enterprises, we also offer maintenance and cleaning services as part of our Annual Maintenance Contracts (AMC).

Regular manual or professional cleaning is still necessary to maintain top efficiency.

Conclusion: A Small Effort for Big Energy Gains

Clean panels mean more sunlight, more power, and more savings. Just like any important asset, your solar system performs best when it’s maintained properly.