Best Solar Installers in Sydney
These are six established solar installers with an office serving Sydney, rechecked on 30 September 2026 against ABN Lookup, each company's own website and dated customer reviews, and listed by years trading. Competition among Sydney installers is fierce. Good prices are available, but so are operators who undercut on price at the expense of the job.
Updated September 2026
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The Sydney solar installers we checked
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.
Sydney installers at a glance
SolarBright
Office: Prestons. Trading since: 2008. NETCC approved seller: Yes.
Best for: South-west Sydney and Macarthur homeowners
1KOMMA5° Sydney
Office: North Sydney. Trading since: 2009. NETCC approved seller: Not confirmed.
Best for: Homeowners who want an established company with a proven track record
Isolux
Office: Parramatta. Trading since: 2013. NETCC approved seller: Not confirmed.
Best for: Western Sydney homeowners wanting an established local electrical and solar company
PSC Energy
Office: Jamisontown. Trading since: 2017. NETCC approved seller: Not confirmed.
Best for: Western Sydney homeowners who want a local specialist
Smart Energy Answers
Office: Castle Hill. Trading since: 2017. NETCC approved seller: Yes.
Best for: Hills District and north-west Sydney homeowners wanting solar plus a battery
Skyline Solar
Office: Vineyard. Trading since: Not published. NETCC approved seller: Yes.
Best for: 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.
- Trading since 2008
- New Energy Tech Consumer Code approved seller
- Focused on New South Wales rather than a national footprint
- 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
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.
- 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
- 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
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.
- More than a decade trading from Parramatta
- Licensed electrical contractor, not just a solar retailer
- Central to western and inner-west 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
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.
- Local to Penrith, the Blue Mountains and the Hawkesbury
- Enphase Australian Installer of the Year 2024
- Solar and battery installs
- 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
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.
- Based in the Hills District at Castle Hill
- New Energy Tech Consumer Code approved seller
- Solar and battery systems
- 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
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.
- More than 10 years trading in north-west Sydney
- New Energy Tech Consumer Code approved seller
- Covers the Hawkesbury, Penrith and the Blue Mountains
- 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
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
5 kW
- Installed (before rebate)
- $4,500 to $6,500national band
- STC rebate
- $1,292 (34 STCs)
- Price after STCs
- $3,208 to $5,208
6.6 kW
- Installed (before rebate)
- $5,800 to $7,500
- STC rebate
- $1,710 (45 STCs)
- Price after STCs
- $4,090 to $5,790
10 kW
- Installed (before rebate)
- $8,500 to $11,000
- STC rebate
- $2,622 (69 STCs)
- Price after STCs
- $5,878 to $8,378
13 kW
- Installed (before rebate)
- $10,000 to $15,000national band
- STC rebate
- $3,382 (89 STCs)
- Price after 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.
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Solar payback in Sydney
6.6 kW
Simple payback2 to 6 years
- Yearly generation
- 9,214 kWh
- Yearly saving
- $949 to $1,659
- Price after STCs
- $4,090 to $5,790
10 kW
Simple payback2 to 6 years
- Yearly generation
- 13,961 kWh
- Yearly saving
- $1,438 to $2,513
- Price after STCs
- $5,878 to $8,378
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 1c to 12c per kWh: the range on current NSW retail plans in the Australian Energy Regulator's plan data, as at 15 October 2026. The top of the range is the best flat rate on any plan; most plans pay much less. 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. NSW feed-in tariffs by retailer
Solar in Sydney: what you need to know
How much solar Sydney is installing
In the 12 months to 15 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
- Parramatta
- Blacktown
- Penrith
- Chatswood
- Manly
- Sutherland
- Castle Hill
- Liverpool
- Bondi
- Hurstville
- + all suburbs
Installs, rebates and feed-in tariffs suburb by suburb: solar panels in Sydney.
New South Wales solar companies that have collapsed
Our register lists 119 solar companies that operated in New South Wales and have since collapsed, from ASIC deregistration and external administration notices, last refreshed on 27 September 2026. When an installer collapses, its workmanship warranty goes with it, which is why every company on this page was checked as still trading on 30 September 2026.
New South Wales solar companies that have collapsed are on the full register. To check a name on a quote, or the company that installed your system, use our installer check.
Sources and data dates
- Installer list
- Rechecked on 30 September 2026 against ABN Lookup, each company's own website and dated customer reviews.
- Installs and system sizes
- Clean Energy Regulator postcode data, 12 months to 15 October 2026.
- STC rebate
- STC Zone 3, the 2026 deeming period and a certificate price of $38.
- Feed-in range
- 1c to 12c per kWh, from current NSW retail plans in the Australian Energy Regulator's plan data, as at 15 October 2026.
- Installed prices
- The Sydney price bands in our solar panel cost guide.
- Retail electricity rate
- 32c per kWh, the NSW average in our electricity data.
- Collapsed companies
- Our register, from ASIC notices, refreshed on 27 September 2026.
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. On a system without a battery, the design guidelines accredited installers work to (published by Solar Accreditation Australia since it took over accreditation from the Clean Energy Council in 2024) keep the panels to no more than 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.
Who is the most reputable solar company?
No single company: reputation in solar is local, and it only lasts as long as the company trades. Check the installer's Solar Accreditation Australia accreditation, whether the seller is a New Energy Tech Consumer Code approved seller, and how long its ABN has been active. Our register lists 119 solar companies that operated in New South Wales and have collapsed.
Is 10kW solar enough to run a house?
For most homes, yes, during the day. A 10 kW system in Sydney makes about 13,961 kWh a year, roughly 38 kWh a day, on 4.5 peak sun hours. It will not run the house at night without a battery, so evening power still comes from the grid.
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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