Brighter Panels, Better Returns: Professional Cleaning for PV Systems
Photovoltaic (PV) panel cleaning is one of our core maintenance activities in the operation of PV parks, because dust, dirt, bird droppings, and other residues reduce the efficiency of panels by blocking sunlight.
Why cleaning matters:
Energy Yield
Even light soiling can reduce panel efficiency by 2–5%, while heavy soiling (dusty environments, pollen season, agricultural zones) can cut performance by 20% or more.
Longevity
Clean panels operate at optimal temperatures and reduce stress on components, helping extend system life.
Monitoring Accuracy
Dirty panels may trigger false alarms of underperformance in monitoring systems, making it harder to detect real technical faults.
Our Cleaning Methods:
Manual Cleaning
- Workers use soft brushes, sponges, or microfiber tools with deionized water.
- Effective but labor-intensive; suited for smaller parks.
Semi-Automated Cleaning
- Robotic brushes or tractor-mounted equipment that sweep across panel rows.
- Faster and consistent, reducing labor cost.
Fully Automated/Robotic Cleaning
- Rail-mounted or autonomous robots clean panels, often water-free (using rotating microfiber rollers).
- Common in large-scale plants, especially in arid areas where water is scarce.
Water Considerations
- Deionized / distilled water prevents mineral deposits (“hard water stains”).
- In water-scarce regions, dry cleaning systems are preferable.
OUR BEST PRACTICES
Overview of our recommended best practices:
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Optimal Cleaning Timing:
We clean early morning or evening to avoid thermal shock (cold water on hot panels can cause cracks).
002
Gentle, Non-Abrasive Methods:
We avoid harsh chemicals or abrasive tools.
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Integrated Maintenance Checks:
We integrate cleaning schedules with regular maintenance inspections (checking for cracks, hotspots, loose cabling).
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Cost–Benefit Optimization:
We evaluate cost vs. gain: sometimes the cost of frequent cleaning exceeds the benefit, so analysis with SCADA performance data is crucial.
why zephiros
we are Reliable and efficient
We combine deep domain experience with a service mindset to support your MV substation needs with clarity, consistency and reliability.
24/7/365
TECHNICAL SUPPORT ALL YEAR ROUND
Continuous monitoring & rapid response capability that ensures operational continuity for mission-critical MV substations.
27+
YEARS OF EXPERIENCE
Long-term involvement in complex wind farm and MV substation environments.
7+
PARTNERS IN 7 COUNTRIES
Expanding our activities across countries around the world.
experts
Your direct point of contact for MV substation maintenance