Solar photovoltaic installations offer a sustainable and low-maintenance solution for harnessing renewable energy. While systems without batteries generally require minimal maintenance, periodic cleaning of solar panels is crucial to ensure optimal energy production. This article highlights the key considerations and best practices for safely and effectively cleaning and maintaining solar panels.
- Safety First: a. Rooftop Installations: Implement necessary safety measures for working at heights, including the use of personal protective equipment. Avoid working in hazardous weather conditions and be cautious of slippery surfaces. b. Fall Risks: Mitigate risks associated with falls by taking proper precautions. Adhere to safety guidelines and standards to ensure the well-being of personnel involved in the cleaning process.
- Cleaning Agents: a. Avoid Chemicals: Use only water and a soft brush for cleaning. Chemicals or abrasives not approved by the panel manufacturer may void the equipment warranty. b. Mild Soap: If needed, a mild, non-abrasive soap can be added to water for cleaning. Ensure it is gentle to prevent any damage to the solar panels.
- Weight Distribution: a. Avoid Point Weight: Refrain from placing any point weight on the panel surface, as it may lead to microcracks in solar cells, causing permanent production losses over time.
- Temperature Considerations: a. High Temperatures: Clean panels during hours of low solar radiation to prevent potential issues associated with high panel temperatures, which can exceed 80ºC in intense sunlight.
- Brush Selection: a. Soft Brush: Use a soft brush without elements that could damage the panel surface. For stubborn dirt, employ a non-abrasive sponge, applying gentle pressure to prevent scratches.
- Frequency of Cleaning: a. Environmental Conditions: Cleaning frequency depends on location and environmental conditions. Areas with high pollution may require more frequent cleaning. Generally, cleaning once or twice a year is recommended.
- Cleaning Schedule: a. Optimal Timing: Clean panels early in the morning or late afternoon to prevent rapid water evaporation and stains, especially when the sun is not directly overhead.
- System Shutdown: a. Disconnect the System: Before cleaning, disconnect the solar power system by turning off the inverter switch or following the manufacturer’s shutdown instructions.
- Proper Rinsing: a. Thorough Rinsing: Ensure a thorough rinse after cleaning to remove any soap residue. Use mineral or demineralised water to avoid leaving hard water spots.
- Sloped Panels: a. Rain Assistance: Steeply angled panels may benefit from rain, but in areas with low rainfall, manual cleaning may be necessary for optimal performance.
- Professional Assistance: a. Qualified Professionals: If uncomfortable with self-cleaning or if panels are hard to reach, consider hiring qualified professionals for the task.
- Regular Maintenance: a. Comprehensive Checks: In addition to cleaning, schedule regular maintenance by professionals to inspect wiring, connections, and components for proper functioning.
Maintaining the cleanliness and functionality of solar panels is essential for optimal energy production. Adhering to these best practices ensures safety, preserves equipment warranties, and extends the overall lifespan of solar photovoltaic installations. Regular cleaning, combined with professional maintenance, contributes to the sustained efficiency of these environmentally friendly energy systems.
