Updated September 2026
Best Solar Installers in Sydney
Sydney is Australia's largest solar market by installation volume, and competition among installers is fierce. That means good deals are available, but so are fly-by-night operators looking to undercut on price at the expense of quality. We evaluated installers across Greater Sydney on their accreditation, track record, customer feedback, and after-sales support.
Our Top Sydney Solar Installers
6 established solar companies working in Sydney, rechecked on 30 September 2026 against each company's own website, its ABN record and dated customer reviews. We list only companies that are trading and have an office serving Sydney; any that close, leave solar or move on come off the list. They run by years trading, longest first, and the details come from each company's own website and public records. We don't accept payment for places on this list, and being listed here is not the same as being Why Solar Approved.
| Installer | Office | Trading since | NETCC approved seller | Best for |
|---|---|---|---|---|
| SolarBright | Prestons | 2008 | Yes | South-west Sydney and Macarthur homeowners |
| 1KOMMA5° Sydney | North Sydney | 2009 | Not confirmed | Homeowners who want an established company with a proven track record |
| Isolux | Parramatta | 2013 | Not confirmed | Western Sydney homeowners wanting an established local electrical and solar company |
| PSC Energy | Jamisontown | 2017 | Not confirmed | Western Sydney homeowners who want a local specialist |
| Smart Energy Answers | Castle Hill | 2017 | Yes | Hills District and north-west Sydney homeowners wanting solar plus a battery |
| Skyline Solar | Vineyard | Not published | Yes | Hawkesbury, Penrith and Blue Mountains homeowners |
SolarBright
A south-west Sydney installer based at Prestons, trading since 2008. It installs solar and batteries in New South Wales only and is a New Energy Tech Consumer Code approved seller.
- Office:
- Prestons, serving Sydney
- Years in business:
- 18 (since 2008)
- Accreditation:
- New Energy Tech Consumer Code approved seller
- Best for:
- South-west Sydney and Macarthur homeowners
- Trading since 2008
- New Energy Tech Consumer Code approved seller
- Focused on New South Wales rather than a national footprint
1KOMMA5° Sydney
Formerly Solaray Energy
One of the longer-running residential solar companies in Sydney, Solaray Energy was bought by the German energy group 1KOMMA5° in January 2023 and now trades under that name from North Sydney.
- Office:
- North Sydney, serving Sydney
- Years in business:
- 17 (since 2009, as Solaray Energy)
- Accreditation:
- Ask for its NETCC approved seller status and the SAA numbers of the installers on your job
- Best for:
- Homeowners who want an established company with a proven track record
- Trading since about 2009 under the Solaray name
- Backed by a larger international energy group since 2023
- Uses a mix of its own and subcontracted installers, so ask who will do your job
Isolux
A Parramatta-based solar and electrical company trading since 2013. It holds electrical contractor licences in several states and handles residential installs across Sydney.
- Office:
- Parramatta, serving Sydney
- Years in business:
- 13 (since 2013)
- Accreditation:
- Ask for its NETCC approved seller status and the SAA numbers of the installers on your job
- Best for:
- Western Sydney homeowners wanting an established local electrical and solar company
- More than a decade trading from Parramatta
- Licensed electrical contractor, not just a solar retailer
- Central to western and inner-west Sydney
PSC Energy
Formerly Penrith Solar Centre
A Western Sydney installer based at Jamisontown near Penrith, trading as Penrith Solar Centre until its rename to PSC Energy. Enphase named it Australian Installer of the Year for 2024.
- Office:
- Jamisontown, serving Sydney
- Years in business:
- 9 (since 2017)
- Accreditation:
- Ask for its NETCC approved seller status and the SAA numbers of the installers on your job
- Best for:
- Western Sydney homeowners who want a local specialist
- Local to Penrith, the Blue Mountains and the Hawkesbury
- Enphase Australian Installer of the Year 2024
- Solar and battery installs
Smart Energy Answers
A Hills District installer based at Castle Hill, covering Greater Sydney with solar and battery systems. It is a New Energy Tech Consumer Code approved seller and was still collecting customer reviews in September 2026.
- Office:
- Castle Hill, serving Sydney
- Years in business:
- 9 (since 2017)
- Accreditation:
- New Energy Tech Consumer Code approved seller
- Best for:
- Hills District and north-west Sydney homeowners wanting solar plus a battery
- Based in the Hills District at Castle Hill
- New Energy Tech Consumer Code approved seller
- Solar and battery systems
Skyline Solar
A Hawkesbury solar company based at Vineyard in north-west Sydney, trading for more than a decade and covering the Hawkesbury, Penrith and the Blue Mountains. It is a New Energy Tech Consumer Code approved seller.
- Office:
- Vineyard, serving Sydney
- Years in business:
- More than 12 years, according to its website
- Accreditation:
- New Energy Tech Consumer Code approved seller
- Best for:
- Hawkesbury, Penrith and Blue Mountains homeowners
- More than 10 years trading in north-west Sydney
- New Energy Tech Consumer Code approved seller
- Covers the Hawkesbury, Penrith and the Blue Mountains
How We Chose These Installers
We're a comparison platform, not an installer. We don't sell solar systems, no installer owns a piece of Why Solar, and nobody pays to appear on this page. This list started as our own research into the Sydney market. On 30 September 2026 we rechecked every company against its own website, ABN Lookup and dated customer reviews, and took off any that had closed, left solar, could not be found or worked in another city. The ones left are real, trading and local.
The installer we match you with is held to a higher bar. An installer earns the Why Solar approval by passing six checks before they see a single homeowner. Together they are the Why Solar Approved standard:
Credentials
Accreditation and licensing, current and genuine, checked rather than assumed.
Staying power
Years actually trading, and the financial stability to still be here in a decade to honour what they promise.
Proof of work
Real installations we can examine, not a folder of stock photos and slogans.
The actual hands
Who physically turns up to do the job, not the cheapest available subcontractor.
What goes in
Genuine, traceable components that match the quote exactly. No quoting German and fitting Chinese.
How they handle trouble
How they behave when something goes wrong. That, not the sales call, is the true measure of a company.
In Sydney those checks have a local edge. Credentials means the licences and accreditation for this state, and experience with the two distributors that run the Sydney network. Staying power means years trading under the same name, because a warranty is only as good as the company behind it. The actual hands means the licensed electricians and accredited installers who turn up, not the cheapest subcontractor available that week.
After every match, one of our team calls you to make sure they turned up, quoted what they said they would, and treated you properly. Installers who don't measure up are removed from the network. Some already have been.
What solar costs in Sydney
Typical installed prices in Sydney by system size, before and after the federal STC rebate. Sydney is in STC Zone 3, which sets how many certificates a system earns. The rebate falls every 1 January until the scheme ends after 2030, so the same system earns less the longer you wait.
| System size | Installed price (before rebate) | STC rebate in Sydney | Price after STCs |
|---|---|---|---|
| 5 kW | $4,500 to $6,500national band | $1,292 (34 STCs) | $3,208 to $5,208 |
| 6.6 kW | $5,800 to $7,500 | $1,710 (45 STCs) | $4,090 to $5,790 |
| 10 kW | $8,500 to $11,000 | $2,622 (69 STCs) | $5,878 to $8,378 |
| 13 kW | $10,000 to $15,000national band | $3,382 (89 STCs) | $6,618 to $11,618 |
Assumptions: installed prices are indicative ranges from our solar panel cost guide: the Sydney bands for 6.6 kW and 10 kW and the national bands for 5 kW and 13 kW. STC rebate: system size × STC zone multiplier × deeming years, rounded down to whole certificates (6.6 kW × Zone 3 multiplier 1.382 × 5-year 2026 deeming period = 45 certificates at $38 each). Retailers usually apply it as a discount on the quote. State programs are not included. Actual quotes vary with the roof, the equipment and the switchboard.
Solar payback in Sydney
How long a 6.6 kW and a 10 kW system take to pay for themselves in Sydney, on the price after STCs above. The range runs from a cheap install on a good feed-in rate to a dear install on a poor one.
| System | Yearly generation | Yearly saving | Price after STCs | Simple payback |
|---|---|---|---|---|
| 6.6 kW | 9,214 kWh | $1,078 to $1,207 | $4,090 to $5,790 | 3 to 5 years |
| 10 kW | 13,961 kWh | $1,633 to $1,829 | $5,878 to $8,378 | 3 to 5 years |
Assumptions: 4.5 peak sun hours a day (our postcode solar data for 2000) × 365 days × 85% system efficiency. 30% of the generation is used in the home at 32c per kWh, the NSW average retail rate in our electricity data, and the rest is exported at 3c to 5c per kWh. Payback is the price after STCs divided by the yearly saving, with no battery, tariff changes or panel degradation. A household that uses more of its solar at home pays back faster.
Solar in Sydney: What You Need to Know
How much solar Sydney is installing
In the 12 months to 1 October 2026, 38,383 small solar systems were installed across Greater Sydney, averaging 11.5 kW each, according to the Clean Energy Regulator's postcode data. That brings the total to 497,012 systems since records began.
Big roofs in the Hills District, the north-west growth areas and the Macarthur estates carry 10 kW and up, often on three-phase supply. Inner-west terraces and semis may only fit a few kilowatts on a north or west plane, and the middle ring of brick veneer sits in between.
Local considerations
Two electricity networks cover Sydney: Ausgrid (east) and Endeavour Energy (west). Each has different export limits and connection processes.
Sydney's housing stock varies enormously, from Federation terraces in the Inner West to modern builds in the Hills District. Panel placement and wiring complexity differ significantly.
Coastal suburbs (Northern Beaches, Eastern Suburbs, Sutherland) see salt spray which can affect panel frame corrosion. Ask about frame anodisation quality.
Strata buildings are increasingly adopting solar through embedded networks, but you need an installer experienced with body corporate processes.
Electricity networks and export limits
- Ausgrid (Eastern Sydney, Inner West, North Shore, Northern Beaches)
- Endeavour Energy (Western Sydney, Blue Mountains, Southern Highlands)
Ausgrid and Endeavour Energy both limit a standard single-phase connection to a 5 kW export, which is why a 6.6 kW array on a 5 kW inverter became the default Sydney system. A larger system on a single-phase home needs a connection application, which a competent installer lodges before the install date, and three-phase homes can export more.
Ausgrid has been offering flexible exports in parts of its network, where the limit rises when the local grid has room and falls when it does not. Ask your installer what the limit is on your street before you settle on a size, and get it in writing on the quote.
State rebates and incentives
On top of the federal STC rebate in the table above, and the federal battery rebate if you add a battery: New South Wales offers VPP incentives under the Peak Demand Reduction Scheme, plus a $15,000 interest-free Home Energy Saver loan. New South Wales rebates in full
What to look for in a Sydney installer
- SAA-accredited installers on your job (mandatory for STC rebates)
- Experience with your specific electricity network (Ausgrid or Endeavour)
- At least 5 years trading under the same business name
- A minimum 5-year workmanship warranty
- Willingness to conduct a physical site inspection
- References or reviews from customers in your area
Sydney Suburbs We Cover
Our installer directory covers all of Greater Sydney, including:
Installs, rebates and feed-in tariffs suburb by suburb: solar panels in Sydney.
Questions about solar installers in Sydney
Who is the best solar installer in Sydney?
There is no single best installer for every Sydney home: the right one depends on your roof, your network and whether you want a battery. We judge installers on the six checks of the Why Solar Approved standard: credentials, staying power, proof of work, the actual hands, what goes in and how they handle trouble. The companies on this page are established Sydney installers worth comparing. If you want one that has passed all six checks, the rebate quiz matches you with one Why Solar Approved installer near you, and a solar expert calls you before you sign anything.
How much does it cost to install a solar system in Sydney?
A 6.6 kW system, the size most price comparisons use, typically costs $5,800 to $7,500 installed in Sydney before rebates. The federal STC rebate on that system in Sydney (STC Zone 3) is worth about $1,710 this year, which brings the price to about $4,090 to $5,790. A 10 kW system is typically $8,500 to $11,000 before the rebate and $5,878 to $8,378 after it. Retailers usually take the STC value off the quote for you. Tile roofs, two storeys, switchboard upgrades and premium panels or inverters push the price up.
What is the 20% rule for solar?
It is a rule of thumb for sizing panels against the inverter: fit around 20 to 33 percent more panel capacity than the inverter is rated for. Panels rarely deliver their full rating on a roof, because heat, dust and the angle of the sun all take a share, so a slightly larger array keeps the inverter working close to capacity for more of the day. The Clean Energy Council's rules allow panels up to a third larger than the inverter, which is why a 5 kW inverter is usually paired with 6.6 kW of panels and a 10 kW inverter with up to 13.3 kW. Oversize beyond that and the system is not eligible for STCs. Ask your installer to show the panel-to-inverter ratio on the quote.
Why are people getting rid of their solar panels?
Mostly they are not giving up on solar, they are replacing a bad system or a small old one. The common stories are an installer that went broke and left nobody to honour the warranty, a cheap inverter that failed after a few years, panels mounted badly enough to leak or come loose, and an export limit that stops a large system earning what the salesperson promised. Our register of collapsed solar companies lists 119 that operated in New South Wales. Some owners are also swapping early systems of a kilowatt or two for a modern array and a battery. Solar itself is rarely the problem; the company behind it often is, which is why staying power is one of our six checks.
How much does a solar installer charge?
Installers price the whole job rather than charging for labour separately. The quote covers the panels, inverter, mounting, cabling, the electrician's time, the connection paperwork and the STC claim. In Sydney that works out to about $879 to $1,136 per kilowatt for a 6.6 kW system before the rebate, and less per kilowatt for bigger systems. Extras that appear on some quotes: a switchboard upgrade, a meter change, tilt frames, work on a steep or two-storey roof, and a three-phase connection. Our service is free for homeowners.
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