How Long Do Solar Panels Last?

Australia has the highest per-capita rate of solar panels in the world, with one in three homes using solar as part of their energy solution. Homeowners and businesses alike are turning to solar energy for its environmental benefits and cost-effectiveness. However, one of the key questions that arises when considering solar panels is their longevity. “How long can you expect your solar investment to last?”

Most solar panels in Australia will last for 25 to 30 years, with some brands offering that timeframe as a warranty. However, this doesn’t mean they stop functioning after this period. Many panels continue to operate at a reduced efficiency beyond their warranty period. The lifespan of solar panels can extend up to 40 years, depending on various factors, including the brand, type and the local climate in which they are installed.

What Factors Influence the Lifespan of Solar Panels?

From local weather conditions to the brand installed, there are several key factors that impact the longevity of your solar panels:

Quality & Brand: High-quality panels from reputable manufacturers tend to last longer and perform better.

Environmental Conditions: Exposure to extreme weather, such as intense heat, humidity or coastal salt sprays, can affect the panels' durability.

Installation & Positioning: Proper installation and optimal positioning can reduce wear and tear, extending the panels' lifespan.

Maintenance: Regular cleaning and maintenance prevent damage and ensure panels operate efficiently.

Local Climate: The specific climate of your local area can influence how quickly panels degrade.

Technological Type: The type of solar panel technology (e.g. monocrystalline, polycrystalline, thin-film) also plays a role in its durability.

Usage Patterns: The intensity of use and the electrical load can impact the panels' longevity.

Physical Damage: Panels can be damaged by external factors like hail, falling branches or other debris.

Solar Panel Maintenance Requirements

To ensure the longevity of solar panels, regular maintenance is essential. This typically involves routine cleaning to remove dust, dirt and other debris that can accumulate on the panels and reduce their efficiency.

It's also important to have periodic professional inspections to check for any physical damage or technical issues. Fortunately, solar panels require relatively low maintenance compared to other energy systems, making them a convenient choice for many home and business owners.