Solar warranties explained: product, performance, workmanship, and whole-of-system

Why the distinction matters

When a system fails, the first question is which promise covers it - because 'warranty' on a solar quote is actually four separate promises from up to three different parties. Understanding the boundaries before you buy is the difference between a covered repair and a finger-pointing exercise.

Under all of these sit your Australian Consumer Law guarantees, which apply regardless of what any warranty document says and cannot be excluded.

Product warranty

The manufacturer's promise that the physical item won't fail from defects. Typical terms: panels around 25 years, inverters commonly from 5 years (often extendable), batteries around 10 years. It covers the hardware itself - a panel that delaminates, an inverter that dies.

Check who handles the claim in practice. A product warranty from a manufacturer with no Australian presence is a promise you'll be enforcing across an ocean; this is a genuine argument for established brands.

Performance (production) warranty

A different panel promise: not that the panel won't break, but that it will still produce a stated percentage of its rated output over time - commonly around 30 years, degrading along a published curve. A panel can be physically intact yet under-produce; this is the warranty that covers that case.

The catch: proving under-performance requires data, which is one of the practical arguments for proper monitoring. Without generation records, a performance claim is nearly impossible to evidence.

Workmanship warranty

The installer's promise covering the installation itself - the mounting, wiring, sealing and connections. A leak at a roof penetration or a failed connection isn't a product defect; it's workmanship, and manufacturer warranties don't touch it.

This is where the licensing and accreditation chain becomes financially relevant: a workmanship warranty is only worth the durability of the entity giving it.

Whole-of-system warranty

The retailer's umbrella: a single promise covering the operation and performance of the complete installed system - products and workmanship together - for a defined period - in our case, a 10-Year Installation & Workmanship Warranty, published in full. Its practical value is a single accountable party: you call us, and determining whether the fault is a panel, the inverter, or the installation is our problem to run down, not yours.

On any quote, ask for all four terms in writing: product terms per component, the panel performance curve, the workmanship period, and the whole-of-system term - plus the sentence confirming none of it limits your Australian Consumer Law rights.