Sydney is Australia’s biggest solar market, which means plenty of excellent installers and plenty of operators you should avoid. This guide is for Sydney homeowners and business owners who want a shortlist, not a sales pitch. We reviewed nine companies that install across the Ausgrid, Endeavour Energy and Essential Energy network areas: Penrith Solar Centre (PSC Energy), 1KOMMA5 Sydney, Natural Solar, Isolux Solar, Esteem Energy, SolarBright, SolarPath NSW, Smart Commercial Solar and Sunboost.
This is independent desk research using company documentation, public records, accreditation registers and customer review patterns on Google and ProductReview. We did not visit offices, request quotes or contact any company, and no company paid for inclusion. By the end you will know who to call first, the trade-offs, and what to check before signing.
The Winners at a Glance
- Best Overall: Penrith Solar Centre (PSC Energy), in-house crews, standout reviews
- Best Premium Systems: 1KOMMA5 Sydney (formerly Solaray Energy)
- Best for Batteries: Natural Solar, first Tesla Powerwall installer
- Best Value: Isolux Solar, 10-year workmanship warranty at mid-market prices
- Best Budget: Esteem Energy, sharp Western Sydney pricing
- Best for Complex Roofs: SolarBright, roofing products background since 2008
- Best Local Installer (Western Sydney): SolarPath NSW
- Best for Commercial: Smart Commercial Solar
- Best for Rock-Bottom Pricing: Sunboost, for buyers who do their homework
Comparison Table
| Company | Award | Operating since | Price position | Workmanship warranty | Install crews | Best suited for |
|---|---|---|---|---|---|---|
| Penrith Solar Centre | Best Overall | 2016 | Premium | 10 years | In-house | Quality-first homeowners |
| 1KOMMA5 Sydney | Best Premium Systems | 2011 (as Solaray) | Premium | Not published | Not published | Enphase and smart-home buyers |
| Natural Solar | Best for Batteries | 2013 | Mid to premium | 12 years (company claim) | Not published | Battery and Powerwall buyers |
| Isolux Solar | Best Value | 2013 | Mid-market | 10 years | Not published | Value-focused households |
| Esteem Energy | Best Budget | Not published | Budget to mid | Not published | Not published | Price-conscious Western Sydney |
| SolarBright | Best for Complex Roofs | 2008 | Mid-market | Not published | Subcontractors (per reviews) | Tricky roofs, older homes |
| SolarPath NSW | Best Local Installer | 2012 | Mid-market | 7-10 years (confirm) | Not published | Western Sydney locals |
| Smart Commercial Solar | Best for Commercial | 2012 | Project-based | Not published | Not published | Businesses, PPAs |
| Sunboost | Best Rock-Bottom Pricing | Not published | Budget | Not published | Subcontractor network | Careful bargain hunters |
Price positions reflect typical Sydney market bands after the federal STC rebate, not quotes we obtained. See our guide to comparing solar quotes.
Best Overall: Penrith Solar Centre (PSC Energy)
If you want the safest all-round choice in Sydney and can stretch the budget, Penrith Solar Centre (now trading as PSC Energy) is the company to call first. It employs its own installation crews, publishes a 10-year workmanship warranty, and holds one of the strongest review records of any installer in the country.
Pros
- In-house, directly employed installer teams, rare at this scale
- 10-year workmanship warranty plus retailer-backed guarantees
- About 4.9 stars from roughly 750 reviews aggregated across platforms as of July 2026
Cons
- Premium pricing; comparable hardware is often quoted cheaper elsewhere in Sydney
- Standardised around Enphase microinverters, so buyers wanting a cheap string inverter or a specific alternative brand have limited choice
Enquire at pscenergy.com.au, or browse all Sydney installers in our directory.
Key facts: launched 2016, Jamisontown head office, services Greater Sydney; approved retailer (confirm on the NETCC and Solar Accreditation Australia registers).
Why selected: in-house crews plus a long warranty plus consistent reviews is what most buyers actually want.
Products and brands: its website standardises on Enphase microinverter systems, with Tesla Powerwall among its batteries.
Installation and reputation: directly employed electricians; reviews consistently mention tidy installs and good communication.
Pricing and value: top of the Sydney range; you pay for the crew model and warranty, not just hardware.
Warranty and after-sales: 10-year workmanship; the company says installs over $20,000 include home warranty insurance.
Praise and complaints: praise for professionalism and clean workmanship; the most repeated gripe is simply price.
Best for: quality-first homeowners planning batteries. Look elsewhere for a budget string-inverter system.
Best Premium Systems: 1KOMMA5 Sydney (formerly Solaray Energy)
Solaray built one of Sydney’s strongest reputations for premium Enphase systems before joining the global 1KOMMA5 group. The catch is a recurring pattern of after-sales complaints since the rebrand.
Pros
- Repeated Enphase installer of the year awards, a strong install-quality signal
- Full smart-home stack: solar, batteries, EV charging, Heartbeat energy management
- Sydney track record dating back to 2011 as Solaray
Cons
- Recurring review complaints about post-sale communication, including slow grid-connection paperwork and slow rectification of installation damage in documented cases
- Premium pricing without a published workmanship warranty period, so pin it down in the contract
Enquire at 1komma5.com/au, or browse all Sydney installers in our directory.
Key facts: in Sydney since 2011 as Solaray, based in Glendenning; check NETCC approval under its current trading name.
Why selected: few Sydney companies match its depth in microinverter systems and integrated energy management.
Products and brands: Enphase microinverters are the core offer, with premium panels and batteries, per the company.
Installation and reputation: install quality reviews are strong; the weak spot is what happens after the invoice is paid.
Pricing and value: premium band; comparable Enphase systems can often be had for less, without the energy management layer.
Warranty and after-sales: workmanship warranty length not clearly published; after-sales responsiveness is the top complaint theme on Trustpilot and ProductReview as of July 2026.
Praise and complaints: praise for design advice and neat installs; complaints about unresponsiveness after signing.
Best for: buyers wanting a top-shelf integrated system who will actively manage the relationship. Look elsewhere if responsive support is your priority.
Best for Batteries: Natural Solar
Natural Solar installed the world’s first Tesla Powerwall in Sydney in January 2016 and has built its business around storage since, claiming more than 12,000 battery installations nationally. With NSW battery support now running through the federal Cheaper Home Batteries Program, a storage specialist belongs on your quote list.
Pros
- Deepest battery pedigree in the Sydney market, including Powerwall and sonnen
- Claims a 12-year workmanship warranty, longer than most rivals
- Strong review praise for battery install execution and savings outcomes
Cons
- Battery-led focus means small solar-only jobs are not its sweet spot, and package quotes can come in above solar-only specialists
- Pricing is not published, so comparison requires a formal quote
Enquire at naturalsolar.com.au, or browse all Sydney installers in our directory.
Key facts: Sydney-based, Australian owned, operating since 2013, services all of Greater Sydney.
Why selected: nobody in Sydney has installed batteries at this scale for this long, which matters for sizing, backup design and warranty claims.
Products and brands: Tesla Powerwall (including early Powerwall 3 installs) and sonnen feature prominently, per its website.
Installation and reputation: reviews describe seamless battery installs; in-house versus contracted crews is not published.
Pricing and value: mid to premium; the federal battery discount (roughly 30 per cent off installed capacity since July 2025) sharpens its packages. See our battery rebate guide.
Warranty and after-sales: the 12-year claim is the longest here; get exact wording, since workmanship, panel and battery cover differ.
Praise and complaints: praise for smooth projects and real bill drops; complaints mostly involve peak-season scheduling.
Best for: anyone whose project starts with a battery. Look elsewhere for a bare-bones panels-only system.
Best Value: Isolux Solar
Isolux has installed across Greater Sydney since 2013 and hits the value sweet spot: tier-one hardware and a 10-year workmanship warranty at prices well below the premium players.
Pros
- 10-year workmanship warranty in writing, matching far dearer competitors
- Operating since 2013 with more than 50,000 panels installed, per the company
- $0 deposit, interest-free finance options
Cons
- Heavy marketing of $0-upfront finance means you must check whether the financed price carries a premium over the cash price
- Less battery specialisation than storage-first rivals, so complex backup configurations may be better handled elsewhere
Enquire at isolux.com.au, or browse all Sydney installers in our directory.
Key facts: operating since 2013, services Greater Sydney and NSW; verify installer accreditation on the SAA register.
Why selected: the warranty-to-price ratio; 10 years of workmanship cover at mid-market pricing is the best value signal in this list.
Products and brands: advertises 25-year panel and 10-year inverter warranties across mainstream tier-one brands; line-ups vary by quote.
Installation and reputation: reviews rate crews professional and tidy; in-house versus subcontracted status not published.
Pricing and value: mid-market, typically thousands below premium microinverter quotes.
Warranty and after-sales: 10-year workmanship, 25-year panel, 10-year inverter per its website; after-sales review patterns are generally positive.
Praise and complaints: praise for responsiveness and a straightforward process; complaints are few, mostly busy-period scheduling.
Best for: households wanting quality without the premium badge. Look elsewhere for high-end battery backup engineering.
Best Budget: Esteem Energy
Esteem Energy runs a lean operation out of Seven Hills serving Sydney (and Perth), and its review pattern is unusually good for a budget-band retailer: customers repeatedly mention transparent quotes with no hidden fees and systems that perform as promised.
Pros
- Sharp pricing without the churn-and-burn feel of the big discounters
- Review patterns highlight transparent, no-hidden-fee quoting
- Local Western Sydney base with commercial capability
Cons
- A documented complaint pattern of installation delays after deposit, in one case months past the promised week, with communication dropping off in between
- Workmanship warranty length and crew model are not published, so both must be confirmed in writing
Enquire at esteemenergy.com.au, or browse all Sydney installers in our directory.
Key facts: based in Seven Hills, services Greater Sydney; founding year not published; verify NETCC approval before signing.
Why selected: budget solar in Sydney is a minefield, and Esteem’s transparency-focused review pattern is the strongest we found in the budget band.
Products and brands: mainstream budget-to-mid panel and inverter brands, quoted per job.
Installation and reputation: reviews describe smooth, efficient installs; subcontracting status not published.
Pricing and value: budget to mid band; with the STC rebate its entry systems are among Sydney’s cheapest credible options. See how the STC rebate works.
Warranty and after-sales: not published in detail, though multiple reviews report problems seen through to resolution.
Praise and complaints: praise for transparency and big bill drops; complaints about post-deposit delays waiting on network approvals.
Best for: price-conscious buyers who still want a real company behind the system. Look elsewhere if you need a guaranteed fast install date.
Best for Complex Roofs: SolarBright
SolarBright is a family-owned Sydney business running since 2008, with over 16,000 installations and a product history in skylights and roof ventilation. That roofing heritage matters if your home has terracotta tiles, steep pitches or an older roof that scares off volume installers.
Pros
- 18 years operating, one of the longest track records in Sydney solar
- Roofing products background, useful on complex or fragile roofs
- Ranked among NSW’s top-rated installers in 2025 industry awards
Cons
- Customer reviews indicate subcontracted electrical installers on at least some jobs, so ask who is physically doing yours
- Workmanship warranty length is not clearly published, a gap at this level of experience
Enquire at solarbright.com.au, or browse all Sydney installers in our directory.
Key facts: established 2008, head office and showroom in Prestons, installs across Sydney and NSW.
Why selected: longevity plus roof expertise; companies that survive 18 years of rebate changes are rare.
Products and brands: solar and batteries plus skylights and ventilation; brand line-ups vary by quote.
Installation and reputation: strongly positive on workmanship and communication; the subcontractor mentions are the caveat.
Pricing and value: mid-market, reasonable for the experience level.
Warranty and after-sales: specifics not published, so request them in writing; long operating history is itself warranty security.
Praise and complaints: praise for helpful site inspections and quality installs; complaint volume is low relative to install count.
Best for: older homes, tile roofs and awkward layouts. Look elsewhere if you insist on directly employed crews only.
Best Local Installer (Western Sydney): SolarPath NSW
SolarPath has operated from the Seven Hills and Kings Park area since 2012, completing thousands of residential and commercial jobs across NSW. A genuine local veteran with strong workmanship reviews, but its paperwork needs pinning down.
Pros
- Australian owned, installing since 2012 with a large completed-install base
- Workmanship quality is the most consistent praise theme in its reviews
- Handles both residential and commercial work
Cons
- Published warranty information is inconsistent: both 7-year and 10-year workmanship figures appear in different materials, so get your figure in the contract
- One detailed review alleges poor after-install responsiveness and disputes its seller accreditation status; check the NETCC register yourself
Enquire at solarpathnsw.com.au, or browse all Sydney installers in our directory.
Key facts: operating since 2012, based in Western Sydney, services NSW across the Endeavour Energy and Ausgrid areas.
Why selected: for Western Sydney buyers who want a nearby, long-serving installer rather than a call centre, this is the strongest pure local.
Products and brands: mainstream panel, inverter and battery options, quoted per job.
Installation and reputation: frequent praise for neat, high-standard installations; crew model not published.
Pricing and value: mid-market Sydney pricing.
Warranty and after-sales: the 7-versus-10-year inconsistency is the detail that decides claims later; a minority of reviews allege slow warranty response.
Praise and complaints: praise for workmanship and pre-install responsiveness; isolated but serious complaints about post-install support.
Best for: Western Sydney households wanting a local with history. Look elsewhere if ironclad published warranty terms matter most.
Best for Commercial: Smart Commercial Solar
Founded in 2012 by Huon Hoogesteger, North Sydney based Smart Commercial Solar does one thing: commercial energy. It topped the national leaderboard for commercial battery installations and counts Bunnings and McCain Foods among its clients.
Pros
- Australia’s number one commercial battery installer in its class, per SunWiz data
- PPA and financed options that remove capital cost for businesses
- 50-plus staff, an SAA design award and major corporate references
Cons
- Not a residential installer, so homeowners should not enquire here
- Project-based pricing means small businesses with modest roofs may find the engagement heavier than a standard retail quote
Enquire at smartcommercialsolar.com.au, or browse all Sydney installers in our directory.
Key facts: founded 2012, North Sydney head office, projects across Australia.
Why selected: commercial solar is a different discipline (tariff analysis, demand charges, export limits) and this is Sydney’s standout specialist.
Products and brands: commercial-grade solar, batteries and monitoring, specified per project.
Installation and reputation: business clients describe on-time, on-budget delivery across multi-site rollouts.
Pricing and value: project-based; compare any PPA offer against outright purchase over the full term.
Warranty and after-sales: negotiated performance guarantees rather than retail-style published warranties; review terms with your own advisor.
Praise and complaints: praise for professionalism and delivery discipline; public complaint volume is low.
Best for: businesses from light industrial to multi-site corporate. Homeowners should use the residential picks above.
Best for Rock-Bottom Pricing: Sunboost
Sunboost is a high-volume national retailer with some of the lowest advertised prices in Sydney. Some customers get a flawless cheap system, but the complaint record is the most serious in this list.
Pros
- Consistently among the cheapest advertised prices for name-brand hardware
- Genuine positive reviews praising crews and workmanship exist alongside the complaints
Cons
- Documented complaints of multi-month delays, full payment demanded before installation, and deposit refunds recovered only after threatening Fair Trading escalation
- A documented case of roof tiles left improperly seated causing leaks, with free rectification refused because the complaint window had passed
- Installs run through a subcontractor network, so crew quality varies by job
Enquire at sunboost.com.au, or browse all Sydney installers in our directory.
Key facts: national retailer servicing all Sydney network areas; founding year not clearly published.
Why selected: value players are a real part of Sydney’s market and many readers will get a Sunboost quote anyway; better to cover the risks honestly.
Products and brands: mainstream name-brand panels and inverters at aggressive prices; models vary by campaign.
Installation and reputation: genuinely mixed, with praise for precise crews sitting alongside the workmanship complaints above.
Pricing and value: budget band, frequently the lowest quote a Sydney buyer receives.
Warranty and after-sales: after-sales support is the dominant complaint theme on ProductReview and Trustpilot as of July 2026. Never pay in full before installation.
Praise and complaints: praise for price and occasionally excellent crews; complaints about delays, prepayment pressure and refund friction.
Best for: informed bargain hunters who verify everything in writing and hold payment until commissioning. Look elsewhere for low-stress long-term support.
How We Reviewed
We shortlisted from Sydney installer directories, industry rankings and review platforms, then assessed every company against the same factors: reputation and years operating, equipment quality, installation quality signals (including in-house versus subcontracted crews where discoverable), pricing position, warranty terms, customer service patterns, review sentiment and after-sales themes.
Sources were each company’s website, the NETCC and Solar Accreditation Australia registers, Google review patterns, ProductReview, Trustpilot, SolarQuotes and SunWiz data, all as of July 2026. We did not request quotes, conduct site visits or contact companies, and no company paid for inclusion. Where a fact could not be verified we wrote “not published” rather than guessing. There is no invented scoring system; the awards reflect the evidence above.
Choosing a Solar Company in Sydney
Check accreditation properly. Installer accreditation moved from the Clean Energy Council to Solar Accreditation Australia in 2024, and retailers are approved under the New Energy Tech Consumer Code. Check both registers yourself rather than trusting website logos.
Ask who is on your roof. In-house crews mean consistent training and accountability. Subcontractors are not automatically bad, but ask who carries the workmanship warranty and who fixes problems.
Get the workmanship warranty in writing. Panel and inverter warranties come from manufacturers. The workmanship warranty is the installer’s own promise, and it is the number that matters most.
Know your network. Sydney spans three distributors: Ausgrid (eastern, northern and inner Sydney), Endeavour Energy (Western Sydney, the Blue Mountains and the Macarthur region) and Essential Energy (outer fringe areas). Export limits and approval timeframes differ between them, and a good installer handles the paperwork and sets realistic expectations.
Understand the rebates. The federal STC incentive discounts every quote and shrinks each January. Battery buyers get roughly 30 per cent off installed battery capacity through the federal Cheaper Home Batteries Program, which since July 2025 is the main support channel for NSW battery purchases (the state’s earlier install incentive was retired when it began, though a small incentive for joining a virtual power plant remains). Details in our battery rebate guide.
Compare quotes on detail, not just price. Insist on itemised hardware models, monitoring inclusion, grid-connection handling, and finance costs separated from cash pricing. Our guides on comparing quotes and choosing an installer cover this step by step, and you can browse more NSW installers here.
FAQ
How much does solar cost in Sydney in 2026? Typical installed prices after the STC rebate run from roughly $4,000-$5,500 for budget 6.6 kW systems to $8,000-$13,000 for premium microinverter systems. Batteries commonly add $8,000-$15,000 before the federal battery discount. Treat quotes far below these bands with suspicion.
How many quotes should I get? Three is the practical minimum, ideally spanning tiers: one premium, one value, one budget. The spread teaches you what you are paying for.
Which warranty actually matters? Workmanship first, inverter second, panels third. Most problems in the first decade are installation or inverter related. A 25-year panel warranty is nearly worthless if the installer offers 12 months on workmanship.
Are cheap installers safe? Sometimes. The risk is not usually the hardware, it is rushed subcontracted installation and absent after-sales support. If you go budget, hold final payment until commissioning and photograph the roof before and after.
How do I check a company is legitimate? Look it up on the NETCC approved seller register, confirm the installing electrician holds SAA accreditation and a NSW electrical licence, and search its trading name plus “complaints”.
What happens if my installer goes bust? Workmanship warranties usually die with the company, which is why years in business matters. Manufacturer warranties survive, but another installer must do the physical work of a claim.
Should I buy a battery now or later? The Cheaper Home Batteries Program discount makes 2026 a genuinely good time if your evening usage justifies it. If you wait, make sure your system is battery-ready (hybrid inverter or microinverters plus switchboard space).
How much deposit is normal? Ten per cent or less is typical. Multiple complaint patterns in this review involved large or full prepayment. Never pay the full balance before the system is installed and commissioned.
What are red flags in a quote? No hardware model numbers, “today only” pricing, unwillingness to name the installing electrician, vague warranty terms, and pressure to pay upfront. Any two together should end the conversation.
About This Review
Written by the Solar Cobber editorial team. Last updated July 2026. Solar Cobber is a free, independent Australian solar directory. We may earn referral or advertising fees from installers listed on this site, but commercial relationships never influence rankings, awards or the criticisms above. Sources: company websites, the NETCC and Solar Accreditation Australia registers, Google reviews, ProductReview.com.au, Trustpilot, SolarQuotes and SunWiz rankings, all accessed July 2026. No quotes were requested and no company paid for placement. Browse every Sydney installer in our directory.