Everything You Need to Know About Keeping Your Solar System Efficient
At GreenEnerCanada, we believe that owning a solar system should be as hassle-free as possible. Thankfully, solar panels require very little maintenance — but knowing when and how to care for them can make a big difference in long-term performance.
University of San Diego researchers found that cleaning solar panels is rarely necessary, as less than 0.05 percent of energy is lost per day due to dirt. Rain typically washes away most dirt and debris, making professional cleaning an unnecessary expense in most cases. However, there are exceptions. Panels installed at less than a 5-degree angle may not self-clean effectively with rain, and panels located near highways, factories, or agricultural fields can accumulate dust that may require cleaning.
Heavy bird droppings can also block enough sunlight to affect energy production.If cleaning is needed, it’s essential to avoid high-pressure water or abrasive materials, which can damage the panels. Always check with your installer for proper cleaning guidance to maintain the efficiency and longevity of your solar system.
Source: The Sierra Club
🐿️ Animal & Critter Damage
It’s more common than you think. Squirrels, raccoons, and birds can damage wires under the panels.
To prevent future issues, we recommend installing critter guards and having a technician check for signs of chewing or nesting.
🌨️ Snow Buildup in Ontario Winters
Snow can block sunlight — especially during short winter days.
However, panels naturally shed snow as they heat up from both sunlight and internal energy conversion. There’s usually no need for removal, but if panels remain covered for days, we recommend contacting a technician for advice.
🌪️ Storms & Weather Inspections
Solar panels are built to withstand Ontario’s weather, but powerful storms can still cause damage. After extreme weather events (hail, windstorms), it’s smart to request a quick visual inspection to check for cracks, frame loosening, or debris buildup.
⚡ Inverter Maintenance: The One Part That Needs Attention
Unlike panels, inverters usually need replacing every 10–15 years.
They’re the “brains” of your system — if they fail, your entire system stops producing power.
Signs you might need inverter service:
💡 Budget Tip: Most inverter replacements cost around 10% of your total system price. Planning ahead helps avoid unexpected downtime.
🛡️ Solar Panel Lifespan & Warranties
Most solar panels come with a 25–30 year performance warranty, and many systems last over 40 years. At the end of the warranty period, panels are typically still producing 85% or more of their original output — proving that solar is a long-term investment.
