You should clean your solar panels during the early morning hours on a cool, overcast day to prevent water from evaporating too quickly and leaving residue.
Preparation and Safety
Before starting, turn off your solar system to avoid any electrical hazards. Inspect the panels and visible wiring from the ground for any damage or wear. Always clean from the ground using an extension brush if possible to avoid working at dangerous and slippery heights on a roof or ladder.
Choosing Tools and Materials
Use only non-abrasive tools like a soft-bristled brush . Avoid high-pressure washers, harsh chemicals, abrasive soaps, and metal tools that can scratch the glass or ruin the anti-reflective coating. Stick to plain water or if possible, a spotless water filtration system attached to a water fed extension pole.
Washing the Panels
Solar panel cleaning is the most common maintenance performed on residential phototactic (PV) energy systems, especially those in dry or windy areas. When dirt, dust, debris, or animal droppings accumulate on the surface of your solar panels, blocked sunlight can significantly reduce their energy production. Knowing this, regular solar panel cleaning can help ensure the maximum output efficiency of your solar power system.Never spray cold water onto hot panels, as the extreme temperature change can crack the glass. If your solar panels are installed on your roof, consider hiring a professional when it is time for a cleaning. Hiring a professional can ensure the job is done both safely and effectively, with the least personal and financial risk involved.
Rinsing and Maintenance
Finish by thoroughly rinsing away any soap residue with clean water so it does not block sunlight. Let the panels air dry completely rather than using a squeegee, which might harm the surface. Monitor your energy production via an app to see if your cleaning efforts successfully restored efficiency.
Workmanship and wiring warranties
Most critical solar maintenance is done to ensure that a system’s electrical components are all working safely and in good condition, which requires a professional inspection. To reduce potential future expenses and maximize your investment in solar, wiring and electrical inspections should be scheduled near the end of your workmanship warranty (also known as your labor warranty) period, which is usually between five and ten years.
For maintenance needs that extend beyond basic cleaning—like firmware updates, inverter diagnostics, or resolving part issues—having a trusted support partner becomes essential.
https://enphase.com/blog/homeowners/solar-panel-cleaning-and-maintenance-guide