Quick answer: A single "25-year warranty" claim usually stands in for up to four separate warranties — product, performance, workmanship and inverter — provided by two or three different parties, each covering a different failure mode. Get each one in writing, with actual numbers, before you sign.
Solar warranties sound reassuring on a sales sheet — "25-year warranty!" — but that single phrase can actually refer to up to three completely different warranties, provided by two or three different parties, each covering different failure modes. Understanding the difference is one of the highest-value five minutes you can spend before signing a solar contract.
This covers physical defects in the panel itself — things like faulty cells, delamination, junction box failures, glass defects or frame corrosion that aren't caused by installation error, extreme weather beyond rated tolerances, or normal wear. It's provided by the panel manufacturer.
This is the warranty most people picture when they hear "25-year solar warranty" — but it's only one of three, and by itself it doesn't guarantee output.
This guarantees that the panel will still produce at least a specified percentage of its original rated output after a given number of years, accounting for the normal, expected degradation every panel experiences. It's also provided by the manufacturer, sometimes as a separate document from the product warranty.
This is the warranty that actually protects the financial case for your purchase — if your panels degrade faster than the guaranteed curve, this is what you'd claim against.
This covers the quality of the physical installation itself — mounting integrity, roof penetration weatherproofing, cable runs, isolator installation, and general compliance with the wiring rules. Critically, this warranty is provided by the installer, not the panel or inverter manufacturer.
Not always grouped with "panel warranty" discussions but equally important — the inverter typically carries its own separate warranty from its own manufacturer, commonly 10–15 years for premium brands, sometimes extendable. Since inverters are statistically more likely to need replacement within the system's life than panels, this warranty term deserves just as much scrutiny as the panel warranties. See our inverter buying guide for more detail.
| Warranty type | Who provides it | What it covers | Typical premium term |
|---|---|---|---|
| Product warranty | Panel manufacturer | Manufacturing defects, physical failure | 20–25 years |
| Performance warranty | Panel manufacturer | Guaranteed % of output over time | 25 years, ~87–92% at year 25 |
| Workmanship warranty | Installer | Installation quality, mounting, wiring | 5–10 years |
| Inverter warranty | Inverter manufacturer | Inverter defects/failure | 10–15 years |
Warranty exclusions are where most disputes actually happen. Common exclusions across manufacturer warranties include:
Sticking to Clean Energy Council approved products installed by a CEC-accredited professional keeps you clear of the two most common exclusion triggers: non-approved equipment and non-accredited installation.
A product and performance warranty is only as good as the manufacturer's ability and willingness to honour it in year 15 — and a workmanship warranty is only as good as the installer still existing and being contactable. Australia's solar industry has seen a meaningful number of installer businesses close, rebrand, or go into liquidation over the past decade, leaving customers holding a manufacturer warranty (still generally claimable directly, though the process is harder without the original installer) but with no recourse at all for the workmanship warranty.
This is why installer selection (see our installer vetting guide) matters as much as equipment selection when it comes to warranty protection in practice — a shorter warranty from an installer who's been trading for over a decade with a genuine local team can be worth more than a longer warranty from a business that's been operating for 18 months.
"25-year warranty" is marketing shorthand for what should really be four separate, specific commitments from two or three different parties. Before you sign anything, get each of the four warranty types in writing, with actual numbers — not just years, but guaranteed output percentages and the party responsible for honouring each one.
Usually just the panel product warranty — physical manufacturing defects. It does not by itself guarantee output (that's the separate performance warranty), the installation (workmanship warranty), or the inverter (its own warranty). Always ask which of the four a "25-year" figure refers to.
The product warranty covers physical defects in the panel, such as faulty cells or delamination. The performance warranty guarantees the panel still produces a set percentage of its rated output over time — commonly around 87–92% at year 25 on premium panels — protecting the financial case if the panels degrade faster than promised.
The installer, not the panel or inverter manufacturer. It covers mounting, weatherproofing and wiring, typically for 5–10 years. Because no manufacturer stands behind it, it's the warranty most at risk if the installer goes out of business.
Yes — arguably more. Inverters are statistically more likely to need replacement within a system's life than panels, so the inverter warranty term (commonly 10–15 years on premium brands) deserves just as much scrutiny as the panel warranties.
Before you sign, it's worth having every warranty term documented in writing by a locally based team. You can compare on that basis at blueenergysolar.com.au, or call 0421 458 217 / email sales@blueenergysolar.com.au.
