Solar Panel Cleaning: Is it easy maintaining solar panels once installed?

Blog updated on 31 October 2023

Solar energy is a game-changer in Australia’s renewable energy landscape. But like any other investment, it requires proper maintenance to ensure optimal performance. One of the most overlooked aspects of solar panel maintenance is cleaning. In this comprehensive guide, we’ll delve deep into the importance of solar panel cleaning, its impact on energy output, and best practices to keep your panels in pristine condition.

Is Solar Panel Cleaning Important?

Solar panels, when exposed to the Australian climate, accumulate dust, bird droppings, and other debris. This not only affects their aesthetic appeal but also their efficiency. 

Studies have shown that dirty solar panels can experience power losses ranging from 5% to 35%. In a country blessed with abundant sunlight like Australia, even a small percentage drop in efficiency can translate to significant energy losses.

DIY vs. Professional Cleaning:

Best Practices for DIY cleaning: 

  • Safety First: If opting for DIY, always use a harness and ensure you have a stable ladder.
  • Cleaning Solution: A mix of mild soap and water usually does the trick. Avoid abrasive chemicals that can damage the panels.
  • Time of Cleaning: Early morning or late afternoon is ideal. Cleaning during peak sun hours can cause rapid evaporation, leaving streaks on the panels.
  • Equipment: Use a soft cloth or sponge. For stubborn spots, a soft-bristle brush is recommended. Avoid high-pressure water to prevent damage.

While many homeowners opt for DIY cleaning, it’s essential to understand the risks involved. Improper cleaning techniques can lead to scratches or damage, reducing the panel’s efficiency. Moreover, climbing roofs poses safety risks. 

Professional cleaners, on the other hand, come equipped with the right tools, cleaning agents, and safety gear, ensuring a thorough and safe cleaning process.

Common Solar Panel Cleaning Methods

Manual Cleaning

  • Manual cleaning requires getting on the rooftop using a ladder, manually scrubbing the panels with a soft-bristled brush, and finally rinsing the panels with a bucket of water.
  • This method is often used for smaller installations.
  • Manual cleaning is relatively cheaper and can be done by homeowners themselves.
  • However, manual cleaning can be laborious and time-consuming, and it also poses certain safety risks (like shocks or falls) if proper precautions are not taken.

Water-Fed Pole Cleaning

  • Water-fed pole cleaning uses purified water and a long pole to reach and clean the panels.
  • This method is often used for larger solar installations or for those that are on a slope.
  • Water-fed pole cleaning is more efficient than manual cleaning and it can reach areas that would be difficult to access otherwise.
  • However, water-fed pole cleaning can be more expensive than manual cleaning and it also requires specialized equipment.

Automatic Cleaning Systems

  • Automatic cleaning systems use robotic technology to clean the panels.
  • This method is often used for large-scale solar installations or for those that require frequent cleaning.
  • Automatic cleaning systems are highly efficient and require minimal human intervention.
  • Automatic cleaning systems can be quite expensive and they also require regular maintenance to ensure optimal performance.

It’s important to bear in mind that the best method of cleaning will depend on your specific circumstances, and it may be worth consulting with a professional solar panel cleaning service to determine the best approach.

Monitoring and Maintenance

Regular monitoring can help in identifying when the panels need cleaning. Many modern solar installations come with monitoring systems that provide real-time data on energy production. A sudden drop in energy output, not linked to weather conditions, can indicate dirty panels.


olar panel cleaning goes beyond mere aesthetics. It’s a crucial aspect of solar panel maintenance that ensures optimal energy production, longevity of the panels, and both environmental and economic benefits. As solar technology advances, the methods and techniques for cleaning and maintenance will also evolve, making it easier for individuals and businesses to harness the full power of the sun.

By understanding the science behind solar panel efficiency and the impact of debris, and by employing advanced cleaning techniques, solar panel owners can ensure that their systems operate at peak performance, maximizing both environmental and economic benefits.