FindSolar.caEvery solar pitch leans on the phrase 25-year warranty, and nearly every homeowner hears more protection than the paper provides. A solar installation carries at least four separate warranties from at least two different companies, each covering different failures for different lengths under different conditions. Untangling them before signing is how you avoid discovering, in year nine, which one you assumed existed.
The warranty stack, piece by piece
The panel product warranty covers manufacturing defects, commonly 12 to 25 years depending on maker. The panel performance warranty is a different promise: that output degrades no faster than a stated curve, typically to about 85% or better at year 25. The inverter warranty runs on its own clock, commonly about 10 to 12 years for string units and around 25 for microinverters. Racking carries its own coverage. And the workmanship warranty, from your installer rather than any manufacturer, covers the labour: the wiring, the mounting, and above all the roof penetrations, for a term that varies widely and tells you plenty about the company offering it.
What 25 years does not mean
A 25-year performance warranty does not promise your system produces its estimate for 25 years; it promises the modules themselves degrade within specification. Weather variance, shade growth, soiling and inverter downtime sit outside it. Nor does any manufacturer warranty automatically pay the labour, shipping or crane involved in swapping a failed part: parts coverage without labour coverage is common, and the gap between them is a real invoice. Ask each quote who pays the truck roll in year nine, and get the answer in the contract.
The installer-longevity problem
Manufacturer warranties survive your installer's disappearance; the workmanship warranty usually does not. That asymmetry should shape your buying: equipment brands with deep Canadian support networks make manufacturer claims practical, and installers with long operating histories make workmanship promises credible. Our installer guide weighs that judgment; the paperwork below is what protects you either way.
The documents to demand at commissioning
Serial numbers for panels and inverters, registered warranty certificates from each manufacturer, the workmanship warranty terms in writing, the electrical permit and inspection record, and the commissioning report showing the system's tested output. Scan the set and store it with your house documents: future buyers and future warranty claims both start by asking for exactly this file.
Questions homeowners ask
What does a 25-year solar panel warranty actually cover?
Usually the performance promise: that the module degrades no faster than a published curve, to roughly 85% or better at year 25. The product warranty against defects can be shorter depending on manufacturer. Neither covers your whole system's output, your inverter, or the workmanship holding it all to the roof.
Who pays the labour to replace a failed panel or inverter?
Read the fine print, because manufacturer warranties commonly cover the part but not the truck roll, labour or shipping. Some installers bridge that gap in their workmanship terms; many do not. Ask every quote directly who pays the labour on a year-nine inverter failure, and get it in writing.
What happens to my warranty if the installer goes out of business?
Manufacturer warranties on panels and inverters survive; register them yourself at commissioning so claims need no middleman. The installer's workmanship warranty typically dies with the company, which is why installer longevity is a buying criterion and why your equipment choice should have strong Canadian manufacturer support.
Are microinverter and string inverter warranties the same length?
No. String inverters commonly carry about 10 to 12 years, and a mid-life replacement is worth budgeting. Microinverters are commonly warranted around 25 years, aligned with the panels above them, though a failure means roof access. The difference is real money and belongs in your architecture decision.
Does installing solar affect my roof warranty?
It can, which is why penetrations and flashing must be done to the roofing manufacturer's requirements and why the two warranties should be read together. If the roof is newer, tell the roofer solar is coming and get their blessing on the mounting approach in writing. Coordination now beats arbitration later.
What warranty documents should I receive after installation?
Panel and inverter serial numbers, registered manufacturer warranty certificates, the workmanship warranty terms, the electrical permit and inspection record, and a commissioning report with tested output. That file is your claims kit and part of your home's resale package; incomplete paperwork is worth chasing while the installer still answers quickly.