Big solar companies do not get meaningfully worse reviews than small ones. We grouped 1,222 rated solar companies in our directory by how many Google reviews they carry, and the average rating moved by 0.08 stars across the whole range, as at 2 August 2026.
That is a boring answer, and it matters. It means the star rating cannot settle the question every homeowner asks at the third quote: the big national outfit, or the local operator with two crews? This post shows the data, explains why it cannot help you, then covers what genuinely does differ between the two.
What we found
Review count is the closest thing to a size signal we hold. A company with 900 reviews has almost certainly done far more jobs than one with nine. So we split the rated companies into five brackets and averaged each.
| Reviews on the listing | Companies | Average rating |
|---|---|---|
| Under 10 | 288 | 4.82 |
| 10 to 49 | 427 | 4.81 |
| 50 to 199 | 382 | 4.83 |
| 200 to 499 | 96 | 4.80 |
| 500 or more | 29 | 4.75 |
All figures as at 2 August 2026, from the 1,222 companies in our directory carrying an exact star rating. That is not all 1,611 listings we hold. The rest have no public rating and are excluded from every number here.
The highest bracket average is 4.83 and the lowest is 4.75, a spread of 0.08 stars. There is no trend line and no steady decline as companies get busier. The 50 to 199 bracket, sitting in the middle, scores highest.
There is a small dip at the top and we will not pretend otherwise. If you squint, the 29 busiest companies averaging 4.75 is the “big companies rate worse” story. Look at what it rests on.
Why this test cannot detect a real difference
With only 29 companies in the 500-plus bracket, this comparison has very little power. If a genuine service gap existed between the largest installers and everyone else, a sample of 29 would probably fail to show it clearly. A few of those companies moving by a tenth of a star would shift that 4.75 noticeably. The 200 to 499 bracket holds 96 companies and averages 4.80, inside the spread of the smaller brackets.
So the correct reading is not “big installers are slightly worse”. It is “we cannot tell, and neither can you, from this number”. A null result rules out a large obvious gap. It does not rule out a small one, and it does not prove big and small installers deliver the same experience.
Two more reasons to hold the finding loosely.
Review count is a rough proxy for size, not a measurement of it. A five-year-old company that asks every customer for a review will out-count a twenty-year-old company that never asks. Some national brands run several listings. Some small operators inherit a review history from an earlier trading name.
Solar ratings are compressed at the top everywhere. Of the 1,222 rated companies, 571 sit at exactly 5.0 and only 13 sit below 4.0, as at 2 August 2026. When almost every business scores between 4.5 and 5.0, no split of that market produces a dramatic gap.
Service area says the same. The 43 companies listed as national average 4.78, which sits inside the state range of 4.77 in the ACT to 4.91 in Tasmania, not below it.
So what should you compare instead?
None of the differences below show up in a star rating, and all of them will show up in your experience over the next ten to fifteen years. Two warnings first. There are excellent and terrible operators at both ends of the size scale, so these are tendencies, not rules. And we have not measured them. They come from how the industry is structured, not from our data.
Warranty backing and whether the business still exists in 10 years
This is the biggest structural difference. A solar system carries three warranties: the panel product warranty (often 12 to 25 years), the inverter warranty (usually 5 to 12 years) and the installer’s workmanship warranty (commonly 5 to 10 years). The first two sit with the manufacturer, which usually expects the installer to handle the claim. The workmanship warranty is worth as much as the company behind it.
A larger business has more chance of still trading in 2036, more staff to process a claim, and often a service department. A one-person operation is a bet on one person’s health, interest and finances. That is the case for going big.
The case against is that solar has a long history of large companies collapsing, restructuring or being bought and rebranded, sometimes leaving warranties in limbo. Size is not survival. A small installer trading in the same suburb for eighteen years may well be safer than a national brand three years into a fast expansion.
Ask both, in writing, who honours workmanship if the company stops trading, and whether the panel and inverter brands have an Australian office taking direct claims. A local brand office lets you claim without the installer.
Subcontracted crews or in-house installers
Most large solar companies use subcontracted crews for at least part of their footprint, especially in regional areas. That is not automatically bad. Subcontractors are accredited electricians running their own businesses and many are excellent. But it changes accountability, because the person who sold the system and the person drilling your roof work for different companies.
Small installers are more likely to have the owner on site, though plenty subcontract when they are busy. Ask directly: will the installers be your employees, and what is the accreditation number of the installer signing off? Check that number yourself on the Solar Accreditation Australia register. Accreditation moved from the Clean Energy Council to Solar Accreditation Australia in 2024, and Solar Cobber does not verify, track or display accreditation status, so this check is yours.
Price and buying power
Larger installers buy panels, inverters and batteries in volume and can price sharply on popular packages. They also carry more overhead, including sales teams and advertising, and some of that lands in the quote. Small installers carry less overhead but pay more per panel.
The cheapest quote comes from either end, so size is a poor predictor of price. The volume advantage shows up on standard jobs, a common package on a simple tile or tin roof, while smaller operators often price better on awkward jobs a volume seller loads up or declines. Our guide on how to compare solar quotes covers lining them up fairly.
The federal rebate is not size-dependent. Small-scale technology certificates are assigned on the system, not the seller, so a small installer accesses the same discount as a national brand, and the same goes for the Cheaper Home Batteries Program. Special rebate access is a sales line, not a fact. See the STC rebate explained.
After-sales responsiveness
This is where the models genuinely diverge, and it cuts both ways.
A large company usually has someone answering the phone in business hours, a ticketing system, and a service van that will eventually come. What you lose is the person who knows your job. You explain it again each time, and a small fault sits in a queue behind bigger ones.
A small installer often gives you the mobile number of the person who did the work, and a fault can be sorted in a day. What you lose is coverage. If that person is in another town, on holiday or overloaded, you wait, with no second line of support.
Our data speaks to availability directory-wide, not by size. Of the 1,169 companies with structured opening hours, 29.5% list Saturday hours and 11.2% list Sunday hours, as at 2 August 2026. Most solar companies are a weekday business.
Who actually turns up on the day
With a big company the salesperson is often not the installer, and the installer did not design the system. Those handovers are where design mistakes appear, like a string layout that ignores a chimney shadow, or a battery position that does not suit the switchboard.
With a small installer, the person quoting is more often the person installing, so what you agreed at the kitchen table is more likely to be what goes on the roof. The trade-off is that a busy one-crew business may push your install date around.
Either way, ask who does the site inspection and whether it happens before you sign. That is a better signal than company size.
The accountability trade-off
Each size offers a different kind of accountability, and you pick which you trust.
A large company gives you process: a complaints procedure, an escalation path, and enough reputation at stake that a public complaint gets attention. You are trusting a system rather than a person, and systems can be slow.
A small company gives you a relationship. The owner’s name is on the business and word of mouth is their marketing budget. You are trusting one person’s character and capacity, with no backup if either fails.
Neither is safer in general. Both are covered by Australian Consumer Law, and both can be taken to state fair trading or, for billing and connection disputes, your state Energy and Water Ombudsman.
A decision guide
Use your situation to pick, not the star rating.
| Your situation | Leans big | Leans small | Why |
|---|---|---|---|
| Standard system, simple roof, price-driven | Yes | Volume buying shows up on common packages | |
| Complex or heritage roof, tricky access | Yes | Awkward jobs suit a crew that quotes and installs | |
| Battery added to an existing system | Yes | Retrofits need a proper inspection first | |
| You want one contact who knows your job | Yes | Direct line to the person who did the work | |
| You want a service desk and a ticket number | Yes | Process survives staff turnover | |
| Regional or remote address | Depends | Depends | Ask who covers your postcode, big brands subcontract regionally |
| Selling the house within 3 years | Yes | Warranty transfer admin is easier with a larger business | |
| You want the owner accountable in person | Yes | Local reputation is a small operator’s main asset | |
| Commercial or large system | Yes | Engineering, grid applications, insurance capacity | |
| You want the same crew back for service | Yes | Less likely once work goes to a subcontracted network |
For most homeowners the honest recommendation is three quotes with at least one from each camp. A national brand against two locals tells you more about fair pricing than any amount of rating research. Browse by area in our company directory or your state’s listings, and our guide to choosing a solar installer covers what to ask them.
Methodology
What the data is. Aggregated public Google Business listing data for solar companies in the Solar Cobber directory, covering star rating, review count, service area and structured opening hours.
Sample. 1,611 companies. Every rating figure comes from the 1,222 carrying an exact public star rating, and the availability figures from the 1,169 with structured opening hours. The rated companies hold 130,526 reviews between them, a median of 27 each.
When and how. All figures were queried against the live directory on 2 August 2026, with no sampling, weighting or exclusions beyond companies missing the relevant field. Size was approximated by bracketing on public review count, as we hold no revenue, headcount or install-volume data.
Limitations, honestly stated:
- The top bracket is too small to conclude from. With 29 companies at 500 or more reviews, this test has little power to detect a real difference even if one exists. Treat the 4.75 figure as unstable.
- Review count is not company size. It reflects how long a listing has existed and how hard the business asks for reviews, as much as jobs done.
- This is not a census of the Australian solar market. It is our directory, a large sample but not a complete list.
- We measure ratings, not installations. We have not inspected a system, requested a quote or contacted a company. The second half of this post is reasoning about industry structure, kept separate from the counted figures.
Frequently asked questions
Are big solar companies worse than small ones?
Not on the evidence we can measure. Across 1,222 rated companies, average ratings ran from 4.75 to 4.83 by review volume, a spread of 0.08 stars, as at 2 August 2026. That is too small to act on, and the busiest bracket holds only 29 companies, so the test is weak. The real differences are warranty backing, crews, after-sales structure and price.
Does a company with thousands of reviews make it a safer choice?
It means more evidence to read, which is useful. The most-reviewed company in our directory carries 6,654 reviews while the median company has 27. A large review base makes the average more reliable, but not the installs better. Read the two and three star reviews and check whether the recent ones look like the old ones.
Will a national solar company be cheaper?
Sometimes, on standard packages where buying volume matters. But large companies also carry sales and marketing overhead that lands in the quote. Get three quotes for the same system size and equipment before assuming either side is cheaper. Our comparison of national solar companies covers who works across states.
What happens to my warranty if the installer goes out of business?
Your panel and inverter product warranties sit with the manufacturer, so they survive, though claiming is far easier if that brand has an Australian office dealing with homeowners directly. Your workmanship warranty usually does not survive. Ask who honours it if the company stops trading, and get the answer in writing. That risk exists at both ends of the size scale.
Related reading
- The Australian Solar Installer Report 2026
- why solar installer ratings tell you almost nothing
- what happens to your warranty if your installer disappears
- what installers claim about themselves, and what it is worth
About this research
This is independent desk research by Solar Cobber. We did not visit sites, request quotes or accept payment for inclusion. Figures are dated and sourced, and pricing and policy details change, so confirm current terms directly before you sign anything.