For Australian homeowners considering rooftop solar in 2026, the average installed cost for a 6.6kW solar system typically ranges from $5,000 to $6,000 after the federal Small-scale Technology Certificate (STC) rebate. For larger energy users, a 10kW solar system generally costs between $8,000 and $10,500 after STCs. These figures represent the net out-of-pocket expense, with actual prices varying based on component quality, installation complexity, and specific state-based incentives.
Investing in solar power remains a financially sound decision in Australia, particularly as electricity prices continue to rise. Understanding the true costs, available rebates, and system components is crucial for making an informed choice.
Understanding Solar Costs in 2026
The total cost of a solar panel installation comprises several key elements: the solar panels themselves, the inverter, mounting hardware, electrical components, and the labour for design and installation. The average cost per watt installed in Australia, after the STC discount, currently sits around $0.88–$0.95 per watt. This cost has remained relatively stable, with efficiencies in technology offsetting some increases in labour and component pricing.
Small-scale Technology Certificates (STCs): Your Primary Federal Rebate
The most significant upfront incentive for Australian households is the federal Small-scale Technology Certificate (STC) scheme. This isn’t a direct cash rebate but an upfront discount on your system’s purchase price, facilitated by your installer. The number of STCs generated depends on your system’s size, your geographical location (STC zone), and the deeming period (which reduces annually on 1 January).
In 2026, the deeming period for STCs is 8.4 years. Assuming an STC value of approximately $40, the federal rebate can significantly reduce the upfront cost:
- 6.6kW system: Roughly $1,800 to $2,000 in STC value.
- 10kW system: Approximately $2,760 to $3,040 in STC value.
It’s important to act in 2026, as the STC value will continue to decrease in subsequent years, potentially adding $500–$1,000+ to the cost if you wait until 2027.
Average 6.6kW Solar System Costs (2026): State-by-State Breakdown
A 6.6kW system is often considered the ‘sweet spot’ for many Australian households, balancing upfront cost with sufficient energy production to offset a significant portion of electricity bills. It typically generates 24 to 28 kilowatt-hours daily.
| State/Territory | Estimated Gross Cost (before STCs) | Estimated Federal STC Value (2026) | Estimated Net Cost (after STCs) |
|---|---|---|---|
| NSW | $7,000 - $8,000 | ~$1,800 | $5,200 - $6,200 |
| VIC | $7,200 - $8,200 | ~$1,800 | $5,400 - $6,400 |
| QLD | $6,900 - $7,900 | ~$2,000 | $4,900 - $5,900 |
| SA | $7,100 - $8,100 | ~$1,900 | $5,200 - $6,200 |
| WA | $7,300 - $8,300 | ~$1,900 | $5,400 - $6,400 |
| ACT | $7,200 - $8,200 | ~$1,800 | $5,400 - $6,400 |
| TAS | $7,000 - $8,000 | ~$1,800 | $5,200 - $6,200 |
| NT | $7,500 - $8,500 | ~$2,000 | $5,500 - $6,500 |
Note: These are estimated average costs for standard Tier 1 systems (e.g., Jinko, Trina panels with Sungrow, GoodWe inverters) and include GST. Premium systems with high-efficiency panels (e.g., SunPower, REC) and premium inverters (e.g., Fronius, SolarEdge) can add 20-30% to these prices.
Average 10kW Solar System Costs (2026): State-by-State Breakdown
A 10kW system is ideal for larger households, those with high energy consumption (e.g., ducted air conditioning, pool pumps), or those planning to add an electric vehicle or battery storage. It can produce roughly 40 kWh per day.
| State/Territory | Estimated Gross Cost (before STCs) | Estimated Federal STC Value (2026) | Estimated Net Cost (after STCs) |
|---|---|---|---|
| NSW | $11,000 - $13,000 | ~$2,800 | $8,200 - $10,200 |
| VIC | $11,200 - $13,200 | ~$2,800 | $8,400 - $10,400 |
| QLD | $10,800 - $12,800 | ~$3,000 | $7,800 - $9,800 |
| SA | $11,000 - $13,000 | ~$2,900 | $8,100 - $10,100 |
| WA | $11,300 - $13,300 | ~$2,900 | $8,400 - $10,400 |
| ACT | $11,200 - $13,200 | ~$2,800 | $8,400 - $10,400 |
| TAS | $11,000 - $13,000 | ~$2,800 | $8,200 - $10,200 |
| NT | $11,800 - $13,800 | ~$3,000 | $8,800 - $10,800 |
Note: These are estimated average costs for standard Tier 1 systems and include GST. Premium systems will be at the higher end or above these ranges.
State-Specific Solar Rebates and Incentives (2026)
Beyond federal STCs, several states offer additional incentives, particularly for batteries or low-income households:
- Victoria: The Solar Panel (PV) Rebate offers up to $1,400 for eligible owner-occupiers with a combined household taxable income under $210,000 and property value under $3 million. An interest-free loan of up to $1,400 is also available. Victoria also has a Solar for Apartments program offering up to $2,800 per participating household.
- New South Wales: The Empowering Homes program offers interest-free loans of up to $14,000 for solar-battery systems (or $9,000 for battery retrofits) for eligible homeowners in specific postcodes with a household income under $180,000. NSW also provides Virtual Power Plant (VPP) incentives, potentially adding $400-$1,500 in savings.
- Queensland: The Battery Booster Program closed in May 2024. However, the federal Cheaper Home Batteries Program offers significant discounts. The Supercharged Solar for Renters program provides landlords with up to $3,500 for solar and battery installations on rental properties.
- South Australia: The SA Home Battery Scheme has ended. However, federal STCs apply to batteries, and the Retailer Energy Productivity Scheme (REPS) offers VPP incentives, with payments up to $2,050 for connecting a battery to an approved VPP.
- Western Australia: Eligible households can receive up to $7,500 off the cost of a battery through a WA government rebate.
- Australian Capital Territory: The Home Energy Support Program offers up to $5,000 for eligible concession holders.
- Tasmania: The Energy Saver Loan scheme has closed.
Key Components: Panels and Inverters
The quality of your solar panels and inverter significantly impacts system performance and longevity.
Solar Panels
Leading Tier 1 brands in Australia for 2026 include:
| Category | Recommended Brands & Models (Examples) |
|---|---|
| Premium | SunPower Maxeon 6, REC Alpha Pure-RX, Aiko Neostar Series, QCells Q.PEAK DUO Series |
| Value | Jinko Tiger Neo, Trina Vertex S+, LONGi Hi-MO X6, Canadian Solar TOPHiKu6 |
Premium panels often boast efficiencies exceeding 23% and come with longer product warranties. While more expensive upfront, they can offer better performance in challenging conditions (e.g., low light, high temperatures) and superior degradation rates over their 25-40 year lifespan.
Solar Inverters
Often considered the ‘brain’ of your solar system, the inverter converts DC power from your panels into usable AC electricity. It’s also the component most likely to require replacement before your panels.
| Category | Recommended Brands & Models (Examples) |
|---|---|
| Premium | Fronius (Primo, Symo, Gen24 Plus), SMA (Sunny Boy/Tripower), Enphase (IQ8 Microinverters), SolarEdge |
| Value/Hybrid | Sungrow (SG/SH series), Huawei (SUN2000), GoodWe (DNS/SDT) |
Hybrid inverters, such as the Fronius Gen24 Plus or Sungrow SH series, are increasingly popular as they are ‘battery-ready’, allowing seamless integration of battery storage in the future. Microinverters (Enphase) and optimisers (SolarEdge) are excellent for complex roofs or systems with shading issues, as they optimise each panel’s output independently.
The Role of Solar Batteries
While this guide focuses on solar panel costs, many Australians are now considering adding a solar battery to maximise self-consumption and reduce reliance on a volatile grid. The federal Cheaper Home Batteries Program, launched in July 2025, offers approximately a 30% upfront discount on eligible battery systems. This discount is calculated at around $336 per kWh in 2026.
“The federal Cheaper Home Batteries Program has been expanded to $7.2 billion, but the STC rebate factor drops from 8.4 to 6.8 in May 2026 — and a new tiered system slashes rebates for batteries over 14kWh.”
It’s crucial to note that from 1 May 2026, the federal battery rebate values will step down, and a new tiered structure will apply, reducing the rebate for larger battery systems (over 14kWh). For current insights into battery costs and the impact of these changes, see our guide: 10kWh vs 20kWh Battery in Australia: Which is Better Value After the May 2026 Rebate Changes?
Average installed costs for a battery-only system (February 2026) are around $8,650 for a 10kWh battery and $14,700 for a 20kWh system. The cost per usable kWh generally decreases with larger systems.
Feed-in Tariffs and Return on Investment
Solar feed-in tariffs (FiTs) – the credit you receive for exporting excess solar energy to the grid – have generally declined across Australia. In 2026, typical daytime FiTs range from 3c to 10c per kWh. Some retailers offer higher, time-varying FiTs for evening exports (up to 10-20c/kWh in NSW, 15-25c/kWh in SA VPPs), but these often come with specific conditions or are tied to battery systems.
This shift means the primary financial benefit of solar now comes from self-consumption – using the electricity your panels generate directly, rather than exporting it. The value of self-consuming your solar power is the avoided cost of buying electricity from the grid, which can be 35-50c/kWh during peak times. This trend reinforces the value proposition of solar batteries.
For more details on optimising your system’s performance and maximising savings, consider reading: The Ultimate 2026 Guide to Sizing Your Solar & Battery System in Australia
Getting the Best Value: Tips for Australian Homeowners
- Get Multiple Quotes: Prices can vary significantly between installers for the same quality system. Obtain at least 3-5 detailed quotes.
- Focus on Quality, Not Just Price: Cheaper systems might use lower-grade components with shorter warranties, leading to higher long-term costs. Prioritise Clean Energy Council (CEC) approved products and accredited installers.
- Understand Your Energy Usage: A detailed understanding of your household’s electricity consumption patterns will help your installer size your system correctly for maximum self-consumption.
- Consider Battery-Ready: Even if you’re not installing a battery immediately, choosing a hybrid inverter will make it significantly easier and cheaper to add one in the future.
- Check State and Local Incentives: Beyond federal STCs, regularly check for new or updated state and local government programs that could offer additional savings or interest-free loans.
- Review Electricity Plans: Compare different electricity retailers’ plans, paying attention to both usage charges and feed-in tariffs, to find one that best complements your solar generation.
Bottom Line
Installing a 6.6kW or 10kW solar system in Australia in 2026 remains a highly beneficial investment. With average net costs ranging from $5,000-$6,000 for a 6.6kW system and $8,000-$10,500 for a 10kW system after federal STCs, the payback periods are attractive, especially when coupled with state-specific incentives and the rapidly declining value of grid electricity. While federal battery rebates are stepping down from May 2026, acting soon can still secure substantial savings. Prioritise quality components and accredited installers to ensure long-term performance and peace of mind. For those looking to further reduce their energy bills, pairing solar with energy efficiency measures is a powerful combination, as explored in our guide: Draught-Proofing vs. a New Heater vs. Solar Panels: Best ROI for Cutting Your Australian Winter Energy Bills in 2026