Comparing Solar Warranties: What Homeowners Need to Look For
Understanding Solar Warranties
Investing in solar energy is one of the most rewarding decisions a homeowner can make. But like any major investment, it’s important to understand the protection that comes with it. Solar warranties ensure that your system performs as promised and safeguard you against unexpected issues. However, not all warranties are created equal. Generally, there are three main types you should look for: product warranties, performance warranties, and installer warranties.
Product Warranties: Protecting Against Defects
A product warranty—sometimes called an equipment warranty—covers any defects in materials or workmanship. This applies to the solar panels themselves, as well as components like inverters or mounting systems.
Most reputable solar panel manufacturers offer product warranties ranging from 10 to 25 years, depending on the brand and model. A longer product warranty generally signals better build quality and durability. When comparing panels, pay close attention to whether the warranty includes labour costs for repairs or replacements—some only cover parts, leaving you responsible for installation fees.
Performance Warranties: Ensuring Long-Term Efficiency
While product warranties cover physical issues, performance warranties guarantee that your panels will continue producing a certain percentage of their rated output over time. For example, a common performance warranty might guarantee at least 80–85% efficiency after 25 years.
Solar panels naturally degrade as they age, but high-quality panels degrade much more slowly. A strong performance warranty ensures that even after two decades, your system will still deliver consistent energy output. When evaluating performance guarantees, check both the degradation rate per year and the final guaranteed performance—these figures can help you compare panels side by side.
Installer Warranties: Quality of Workmanship
The installer warranty—sometimes known as a workmanship or labour warranty—covers issues that arise from the installation process rather than the panels themselves. This includes problems like poor wiring, roof leaks, or loose mounting hardware.
Installer warranties typically range from 1 to 10 years, depending on the company. It’s important to choose a Clean Energy Council (CEC)-accredited installer in Australia or a certified professional in your region. A reputable installer will not only offer a solid warranty but also handle warranty claims on your behalf if any issues occur with the equipment.
What to Look for Before You Buy
When comparing solar warranties, consider:
Length and coverage: The longer and more comprehensive, the better.
Transferability: Can the warranty be transferred if you sell your home?
Reputation: Choose manufacturers and installers with a proven track record of honouring their warranties.
Customer support: Check how claims are handled and if local support is available.
The Power of Peace of Mind
A well-chosen solar system with reliable warranties ensures not only consistent performance but also long-term peace of mind. By understanding the differences between product, performance, and installer warranties, homeowners can make confident, informed decisions that protect their investment for decades to come.
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Damien Frearson
