Keeping solar panels clean can help maintain energy production, but some common DIY fixes do more harm than good to your solar panels. Below is a short, practical guide to what not to do, why it’s risky, and safer alternatives backed by major panel manufacturers.

Top Do Nots When Cleaning Solar Panels (and the safer options)

Don’t use high-pressure washers or power washers

High-pressure spray can crack glass, damage seals, and force water into electrical junctions. Manufacturers recommend low-pressure rinsing or gentle brushing instead. firstsolar.com+1

Do this instead: Use a garden hose with a gentle nozzle or low-pressure rinse and a soft, non-abrasive sponge or brush. We use special soft brushes and terry cloth to clean panels gently

Don’t use abrasive tools, steel wool, or scrapers

Abrasives cause micro-scratches that reduce performance and can permanently damage anti-reflective coatings. Many OEM manuals explicitly forbid abrasive cleaners or scrubbing pads. PVO International+1

Do this instead: Soft microfiber cloths, soft brushes, or non-abrasive sponges with mild soap (if needed).

Don’t use harsh chemicals (acids, strong alkalis, solvents)

When cleaning solar panels, avoid using Bleach, ammonia, concentrated acids, degreasers, or solvents, as they can etch glass, strip coatings, or damage polymer components. First Solar and other manufacturers list specific chemicals to avoid. PVO International+1

Do this instead: If detergent is necessary, use a mild, non-caustic dish soap diluted in water (follow your module maker’s pH recommendations). Rinse thoroughly with fresh water. There are also specially formulated solar panel cleaning solutions that can be purchased.

Don’t clean hot panels in full sun or at midday

Cleaning hot solar panel modules can cause rapid evaporation that leaves mineral streaks and can stress the glass (thermal shock). Several manufacturers recommend cleaning only when panels are cool (early morning or after sunset). solar.na.panasonic.com+1

Do this instead: Clean panels early in the morning, late evening, or on cool, overcast days.

6. Don’t walk on, stand on, or place heavy loads on panels

Solar Panels are strong but not designed to be walked on — point loads can cause micro-cracks that reduce lifetime output. Manufacturer manuals set clear load and handling limits. firstsolar.com+1

Do this instead: Use safe access methods (ladders, scaffolding) and stay off the modules — use extension tools or hire professionals with fall protection and proper platform gear.

7. Don’t ignore safety around live electrical components

Wet conditions + DC electrical systems = shock risk. Installation manuals warn that modules produce voltage in daylight and that maintenance should follow safety procedures. canadiansolar.com+1

Do this instead: Turn off the system if recommended by your inverter/manufacturer, wear insulated gloves and eye protection, and keep water away from junction boxes and wiring. When in doubt, hire trained technicians.

Quick summary — safe, simple checklist

• Clean when panels are cool (morning/evening). solar.na.panasonic.com
• Use low-pressure water + soft cloth; avoid pressure washers. firstsolar.com
• Don’t use abrasive pads, strong chemicals, or hard water. PVO International+1
• Never stand on panels; follow load limits and safety procedures. Iris Hellas
• If your system has microinverters/balancers, check inverter maker’s maintenance guidance too. enphase.com

Want peace of mind? Hire Camarillo Solar Panel Cleaning

If you are not into climbing on roofs and do not have the special equipment needed to clean solar panels, then let Cam Solar Clean come out and clean your panels for you.

Sources (manufacturer guidance & manuals)

• First Solar — Module Cleaning Guidelines / Application Notes (covers acceptable cleaning methods, load limits, water/chemical restrictions). firstsolar.com+1
• JinkoSolar — O&M / Module Cleaning guidance (water quality specs, methods; warnings about warranty/incorrect cleaning). JinkoSolar+1
• Canadian Solar — Installation & Cleaning Guidelines (safety, cleaning procedure, professional maintenance recommendations). canadiansolar.com+1
• Panasonic Solar — Support / FAQ: maintenance & cleaning (recommendation to clean ~twice/year and how to do so safely). solar.na.panasonic.com
• Tesla — Solar Roof / Solar Support (avoid detergents, abrasives, solvents; refer to owner manual). Tesla