Why the installer matters more than the panels
People obsess over panel brands and barely think about who bolts them on. That is backwards. A premium panel installed badly will leak, underperform or void its own warranty. A solid mid-range panel installed properly by a stable company will quietly earn its keep for decades. The single biggest variable in whether your solar is a success is the installer.
It also matters because warranties are only worth as much as the business behind them. A 25-year panel warranty and a 10-year workmanship warranty mean nothing if the company that issued them has folded. The Australian solar industry has a long history of cheap operators selling hard, then disappearing when claims arrive.
CEC accreditation, explained properly
The Clean Energy Council (CEC) accredits the individual installers and the retailers in Australian solar. Two things to understand:
- ✓Accredited installer: the licensed person who designs and signs off the install. You must have a CEC-accredited installer involved or the system cannot claim STCs. Ask for the accredited installer's name and number, not just the company's.
- ✓Approved Solar Retailer: a company that has signed the CEC's code of conduct, covering sales conduct, contracts and after-sales support. It is a good signal, though not a legal requirement.
Verify accreditation yourself rather than trusting a logo on a flyer. Anyone can print a badge. The accreditation must belong to the person actually doing or supervising your job.
Red flags and cowboy tactics
The hard-sell solar industry runs on a handful of repeatable tricks. Recognise them and you are most of the way to a good outcome.
- ✗Doorknockers and cold callers. Reputable installers are busy with referrals and online enquiries. Unsolicited door-to-door solar is a classic high-pressure model.
- ✗"Sign today or lose the rebate." The STC discount steps down once a year in January, not this afternoon. Manufactured urgency is the oldest trick there is.
- ✗"Free solar" and "$0 upfront." These are finance products or inflated-price deals. Nothing is free. Read what you are actually signing.
- ✗A price that is wildly cheaper than everyone else. It almost always means budget panels, a budget inverter, or corners cut on the install.
- ✗No physical address or trading history. Brand-new companies and PO-box operators are the ones most likely to vanish before your warranty does.
- ✗Vague or verbal quotes. If they will not put an itemised, all-inclusive price in writing, that is the answer.
- ✗Subcontracted crews they cannot name. Some retailers sell, then hand your roof to the cheapest available subbie. Ask who actually installs.
The questions to ask every installer
Ask these before you sign. The answers tell you more than any brochure:
- ✓Who is the CEC-accredited installer on my job, and what is their accreditation number?
- ✓Are your install crews employees or subcontractors?
- ✓How long has this company traded under this name and ABN?
- ✓Is the quote fully installed and all-inclusive, after the STC discount?
- ✓Exactly which panel and inverter model am I getting, and why that one?
- ✓What is the product warranty, the performance warranty, and your workmanship warranty?
- ✓Who do I call if something fails in year three, and is that support local?
- ✓Will you handle the grid connection application and any meter change?
Our installer vetting checklist turns all of this into a printable list of 23 questions you can take into every quote.
The contract fine print that bites
- ✗"Subject to site inspection" price padding. A low quote can balloon after inspection. Ask what could trigger extra charges and how much.
- ✗Switchboard or meter upgrades excluded. These can add hundreds or more. Confirm in writing whether they are included.
- ✗Deposit and cancellation terms. Know how much deposit, and what you forfeit if you pull out. Be wary of large upfront deposits.
- ✗Finance bundled into the deal. If finance is involved, read the interest rate and total repayable, not just the weekly figure.
- ✗Warranty conditions. Some warranties require registration or annual servicing. Miss a step and the cover lapses.
Warranties that actually hold up
There are three warranties on a solar system, and people confuse them constantly:
- ✓Product warranty (the panel hardware): commonly 12 to 25 years on quality panels.
- ✓Performance warranty (output over time): typically guarantees about 85 to 90% output at 25 years.
- ✓Workmanship warranty (the install itself): from the installer, usually 5 to 10 years. This is the one most likely to be tested, and the one that dies if the installer disappears.
This is why a long manufacturer warranty on the panel is not enough on its own. You need a workmanship warranty from a company that will still be answering the phone in a decade.
How to compare quotes fairly
Get at least three quotes and line them up on the things that actually matter:
- ✓Total installed price after STCs, all-inclusive.
- ✓Exact panel and inverter models, not just brand names.
- ✓Dollars per watt, so you can compare different sizes fairly.
- ✓Workmanship warranty length and the installer's trading history.
- ✓Whether crews are in-house and support is local.
The right choice is usually not the cheapest and not the most expensive. It is the stable, accredited installer offering quality components at a fair price, who answers your questions without pressure. If you would rather not chase three quotes yourself, that is exactly what our matching service does.
Install day and after-sales: what good looks like
Choosing the installer is most of the battle, but knowing what a professional job looks like on the day helps you hold them to it. A good install is not just panels on a roof, it is a documented, compliant, monitored system you can trust for decades.
- ✓A site-specific design, not a generic layout. The panel positions should reflect your actual roof, shading and orientation.
- ✓Tidy, compliant wiring and isolators, with conduit run neatly and labelled to standard. Sloppy cabling is a sign of a rushed job.
- ✓Proper roof penetrations and flashing so you never get a leak. This is where cheap, fast installs come back to bite.
- ✓A full handover pack: compliance certificate, system documentation, warranties in writing and the monitoring app set up and shown to you.
- ✓Monitoring that works, so you and the installer can see if a panel or the inverter underperforms.
After-sales is where the cowboys and the keepers separate. Ask, before you sign, what happens if your output drops or the inverter throws an error in year three. A quality installer has a local support line, a maintenance path and a habit of answering. A churn-and-burn operator goes quiet the moment the invoice is paid. Reading recent reviews specifically about warranty and support, not just the sales experience, tells you which one you are dealing with. The cheapest quote that comes with no one to call is rarely the cheapest system once something goes wrong.
Frequently asked questions
How do I choose a good solar installer in Australia?
Choose the installer before the panel brand. Look for CEC-accredited installers, a real local trading history, in-house crews, strong workmanship warranties, and a written, all-inclusive quote. Get at least three quotes and compare on total installed price, exact components and the installer's track record.
What does CEC accreditation mean?
The Clean Energy Council accredits the individual installers who design and sign off solar systems, and separately approves retailers who sign its code of conduct. A CEC-accredited installer must be involved or the system cannot claim the STC discount. Always verify the accredited person, not just a company logo.
What are the red flags of a bad solar installer?
Door-to-door selling, fake rebate-deadline pressure, free solar or $0 upfront pitches, prices far below everyone else, no physical address or trading history, verbal-only quotes, and unnamed subcontracted crews. Any of these is a reason to walk away.
Why does the installer matter more than the panels?
A premium panel installed badly will underperform or void its warranty, while a solid mid-range panel installed well lasts decades. Warranties also depend on the installer still existing, so a stable, accredited company is worth more than a slightly cheaper unknown one.
How many solar quotes should I get?
At least three. Compare them on total installed price after STCs, exact panel and inverter models, dollars per watt, workmanship warranty and the installer's history. The best choice is usually a stable, accredited installer at a fair price, not the cheapest quote.