Every brand rep who walks through your door will hand you a warranty document. Twenty-five years on the panels, ten or twelve on the inverter, a glossy line about peace of mind. That document is the easy part. It is also close to worthless as a buying signal, because it tells you what the brand promises, not what the brand actually does when a unit dies in year three and your customer is ringing you every second day.
I have been on the wrong end of a warranty process, and I can tell you the cost of one does not land on the manufacturer. It lands on you.
This is the briefing I would give a new install manager before they sign off on any new product for the range. Not “is the warranty good”. The real question: when this thing fails out of the box or three years in, what does the claim actually look like, and who funds the labour while I wait?
The real cost of a warranty callback is not the unit
When people picture a warranty claim they picture the replacement part. A new inverter, a new panel, shipped out free. Job done.
That is the cheapest part of the whole exercise, and it is the part the manufacturer covers. The expensive part is yours.
Walk it through. A unit fails. You send someone out to diagnose it, because you cannot lodge a claim on a hunch. That is a truck roll and an hour or two of a qualified person’s time. Then you lodge, you wait for the replacement to be approved and dispatched, and you send a second truck out to swap it once it arrives. On some roofs that means scaffold or height-access gear booked again. Two trips, sometimes three, plus access, plus the admin time chasing the claim.
For a residential job, a single warranty callback can wipe the entire margin you made on the original install. Sometimes more. And that is one callback. The number that should actually scare you is failure rate multiplied across every unit of that product you have in the field.
This is why I treat warranty process as a supplier-selection question, not a customer-service one. It sits in the same bucket as lead times and stock reliability. It is a business risk you are pricing, whether you price it deliberately or find out the hard way.
The questions to put to a brand before they get on your range
Before any product becomes a preferred supplier, I want answers to a specific set of questions. Not the marketing answers. The operational ones. A good brand will have these ready. A brand that gets cagey is telling you something.
What is your field failure rate for this product in the Australian market, and will you put it in writing? This is the single most revealing question you can ask. A brand that knows its number and is not embarrassed by it will give it to you. A brand that dodges, deflects, or has never measured it is a red flag on its own. Panel failure rates are generally very low across the industry; inverter failure rates vary considerably by product and price tier, which is exactly why the question is fair and worth pressing on.
What is the average time from claim lodgement to a replacement unit being dispatched? Days matters here. There is a world of difference between a brand that ships a replacement in 48 hours and one that takes six weeks while your customer’s system sits dead and they assume you sold them junk.
Is the warranty serviced by the manufacturer directly, or by a third-party warranty insurer? This changes everything about how a claim runs. A manufacturer servicing its own warranty has a reputation to protect with you. A third-party insurer is running a claims-minimisation business, and the process can feel like it.
Is there a labour reimbursement component, or is it product replacement only? Most budget brands replace the product and nothing else. Your truck rolls are your problem. A growing number of premium brands offer some labour contribution, and when a callback costs you a few hundred dollars in labour, that difference is the whole game.
What documentation do I need to lodge, and who is my point of contact? You want a named channel, not a generic support inbox that swallows emails. Know upfront what a complete claim looks like so you are not scrambling for it later.
Do you have warranty staff based in Australia, or does every claim route offshore? Local staff in your timezone, who understand AS/NZS install requirements, resolve claims faster than a queue on the other side of the world. This is not xenophobia, it is logistics.
Why the failure-rate answer matters more than the price
Here is the maths that most installers never run, and the one that should drive the decision.
Take two products. The budget option saves you a chunk per unit upfront. The premium option costs more but, let us say, carries a meaningfully lower field failure rate and a labour contribution on claims. Most people stop at the upfront price gap and pick the cheap one.
Now layer in the callback cost. Every failure costs you a diagnosis trip and a replacement trip in labour and access, money that comes straight off the original job’s margin. If the budget product fails at even a couple of percent higher rate across your install volume, and each callback costs you several hundred dollars you do not get back, the upfront saving can reverse entirely. At volume it reverses hard.
I am not going to hand you a fabricated percentage here, because the real numbers vary by product, and any specific figure I made up would be worse than useless. The point is the method: expected failure rate multiplied by average callback cost is a real line in your cost of goods, and you should estimate it before you commit, not discover it after. A cheap unit with a bad claims process is often the most expensive product on your range once the truck rolls are counted.
Peer verification beats the brochure every time
The best due diligence I know costs you three phone calls. Ring three other installers who have actually lodged a claim with this brand. Not “would you recommend the product”, which gets you a shrug and a “yeah, been fine”. The specific question: “Have you lodged a warranty claim with them, and how did it actually go?”
That is where the truth lives. How long did the replacement take. Did they pay anything toward labour. Did a human answer the phone or did it vanish into a portal. The trade is small and most people will tell you straight, because they have been burned too and they remember who burned them.
This is also why your supplier relationships are worth more than the cheapest line price. I have written before about why leaning on a single solar supplier is a risk worth managing, and warranty process is part of the same picture. A supplier who backs their product when it fails is worth paying for, and worth staying loyal to.
Your own install documentation decides how fast a claim clears
There is a part of this that is entirely within your control, and most businesses leave money on the table by ignoring it.
A warranty claim lodged with serial numbers, install-date records, and dated install photos already in hand moves faster than one you are reconstructing from memory six months later. This is not a cited rule, it is plain logic: the assessor has fewer reasons to push back when the evidence is sitting in front of them. A claim that arrives complete gets actioned. A claim missing the serial number or proof of compliant install gets parked while everyone hunts for paperwork, and that delay is your customer’s dead system and your reputation.
Capture it at install. Serials, the compliance sign-off, photos of the install and the nameplate, the commissioning data. File it against the job so anyone can pull it in thirty seconds when a claim comes in two years later. The brands assess claims against the documentation; thorough records at install are the cheapest insurance you will ever buy on a callback.
This is exactly the kind of discipline that falls apart when job records live across a notebook, three phones, and someone’s memory. It is also the reason I am building CurrentFlow, the operating platform I wished I had when I was managing this: the idea is that serials, photos, and sign-off captured against the job at install are there waiting when a warranty claim lands, instead of scattered across tools that do not talk to each other. That is the problem I am trying to solve, not a feature I am claiming works today.
A note on what the warranty does and does not cover
One thing worth keeping straight for your own protection. Australia’s consumer guarantees under the Australian Consumer Law sit beneath any manufacturer’s written warranty as a separate, independent layer of protection. Those statutory guarantees kick in regardless of what the warranty document says or doesn’t say (ACCC, n.d.). Goods must be of acceptable quality and fit for purpose, and a major failure can entitle the customer to a remedy independent of the brand’s warranty terms (Australian Competition and Consumer Commission, 2022).
That matters to you because, as the supplier who sold and installed the system, you can be the one the customer pursues under those guarantees, not just the manufacturer. The Clean Energy Council’s Solar Retailer Code of Conduct sets out the warranty and after-sales obligations expected of accredited retailers, and it is worth knowing where you stand (Clean Energy Council, n.d.). Vetting the brand’s claims process is partly about protecting your own margin, and partly about not being left carrying an obligation the manufacturer quietly walked away from.
None of this touches the STC side of the job, which runs on its own track under the Renewable Energy Target administered by the Clean Energy Regulator (Clean Energy Regulator, n.d.). But the same principle applies across both: the paperwork discipline that gets you paid is the paperwork discipline that protects you when something goes wrong.
The short version
The warranty document is marketing until you know how a claim runs in practice. Before you put any product on your range, get the field failure rate in writing, find out who services the warranty and how fast, ask whether labour is reimbursed, and ring three installers who have actually lodged a claim. Then run the real cost: failure rate times callback cost, off your margin. Capture serials and photos at every install so the claim clears fast when it comes. Do that, and a warranty stops being a leap of faith and becomes a number you can actually price.
References
Australian Competition and Consumer Commission. (n.d.). Consumer guarantees. Australian Competition and Consumer Commission.
Australian Competition and Consumer Commission. (2022). Repair, replace, refund, cancel. Australian Competition and Consumer Commission.
Clean Energy Council. (n.d.). Solar Retailer Code of Conduct. Clean Energy Council.
Clean Energy Regulator. (n.d.). Small-scale Renewable Energy Scheme. Australian Government, Clean Energy Regulator.
Standards Australia. (n.d.). AS/NZS 5033: Installation and safety requirements for photovoltaic (PV) arrays. Standards Australia.
FAQ
What is the most important question to ask a solar brand about its warranty?
Ask for the field failure rate for that product in the Australian market, in writing. A brand that knows its number and shares it is being straight with you. A brand that dodges the question is telling you it either does not measure failures or does not want you to see them. Everything else, claim turnaround, labour reimbursement, point of contact, follows from how openly they handle that first question.
Does the manufacturer’s warranty cover my labour on a callback?
Usually not. Most warranties, especially on budget products, replace the failed unit and nothing else. The diagnosis trip, the replacement trip, and any roof or height access are yours to fund out of the original job’s margin. Some premium brands now offer a labour contribution on claims, which is worth asking about directly, because at volume it changes the real cost of the product significantly.
How do I check a warranty process before I commit to a brand?
Ring three other installers who have actually lodged a claim with that brand, and ask how it went in practice: how long the replacement took, whether any labour was covered, and whether a person answered or it disappeared into a portal. Peer experience beats any brochure. The trade is small and most operators will give you a straight answer.
Are STCs a rebate that affects my warranty obligations?
No, and the two are separate. Small-scale Technology Certificates (STCs) are tradeable certificates created under the Renewable Energy Target, not a government rebate, and they run on their own track administered by the Clean Energy Regulator. Your warranty obligations to the customer sit under the manufacturer’s warranty and the Australian Consumer Law, independent of anything to do with STCs.
Can I be liable if the manufacturer refuses a warranty claim?
Potentially, yes. Under the Australian Consumer Law, the consumer guarantees apply to the supplier who sold and installed the system, not only the manufacturer. If a brand folds or stonewalls a claim, the customer can still pursue you for a remedy on goods that were not of acceptable quality. That is exactly why vetting a brand’s claims process protects your business, not just your customer’s system.