For Australian homeowners in 2026, investing in rooftop solar remains one of the most effective ways to combat rising electricity bills and achieve energy independence. A standard 6.6kW solar system typically costs between $5,000 and $6,000 in most Australian states after federal rebates. For larger households or those planning for electric vehicle charging, a 10kW system generally ranges from $8,000 to $10,500, also post-rebate.
These figures represent quality, fully installed systems, including panels, inverters, and labour. While the upfront investment is significant, federal and state incentives continue to make solar highly accessible, often reducing the cost per watt to approximately $0.88 to $0.95 across the country.
The Federal STC Rebate: Your Primary Discount
The cornerstone of solar affordability in Australia is the federal Small-scale Renewable Energy Scheme (SRES), delivered through Small-scale Technology Certificates (STCs). This national rebate acts as a point-of-sale discount, directly reducing the upfront cost of your solar system.
In 2026, the STC scheme continues to offer substantial savings, though its value gradually steps down each year until its scheduled conclusion at the end of 2030. For a typical 6.6kW system, this rebate can reduce the price by between $1,500 and $2,000. A 10kW system could see savings of $2,000 to $3,000. It’s important to note that on 1 January 2026, the ‘deeming period’ for STCs dropped from six years to five, which has reduced the rebate value for a standard 6.6kW system by roughly $500–$600 compared to the previous year.
Eligibility for the STC rebate requires your system to be under 100kW, designed and installed by Solar Accreditation Australia (SAA) accredited professionals, and use Clean Energy Council (CEC) approved panels and inverters.
Average Solar System Costs in 2026 (After Federal Rebates)
Prices vary based on component quality (budget, mid-range, premium), installation complexity, and location. The following table provides indicative installed costs for common residential system sizes after the federal STC rebate, but before any state-specific incentives.
| System Size | Standard Quality System (AUD) | Premium Quality System (AUD) |
|---|---|---|
| 3kW | $3,500 – $4,500 | $4,500 – $6,000 |
| 5kW | $4,500 – $5,500 | $5,500 – $7,000 |
| 6.6kW | $5,000 – $6,000 | $6,500 – $8,500 |
| 10kW | $8,000 – $10,500 | $10,500 – $12,000+ |
“A 6.6kW solar system in 2026 typically costs between $5,000 and $6,000 in most Australian states, after rebates.”
State-by-State Solar Rebates and Incentives
Beyond the federal STC scheme, several states offer additional incentives.
Victoria
Victoria’s Solar Homes Program is a significant boost for homeowners. Eligible owner-occupiers can access a rebate of up to $1,400 for new solar panel (PV) installations in 2026. You can also apply for an interest-free loan of up to $1,400 to match the rebate amount, further reducing upfront costs.
Eligibility requires a combined household taxable income under $210,000 per year, property value under $3 million, and no previous solar panel or battery rebate under the program for that property within the last 10 years. The rebate is applied as a point-of-sale discount.
Victorian households may also be eligible for a hot water rebate of up to $1,400 for eligible heat pump or solar hot water systems. This can be combined with solar panel installations for maximum energy efficiency. For more details, see our guide on Are Heat Pump Hot Water Systems Worth It in Australia 2026? A Guide to Costs, Savings & State Rebates.
New South Wales
NSW does not offer a standalone state solar panel rebate for detached homes in 2026. The primary incentive for solar PV comes from the federal STC scheme. However, NSW does provide incentives for battery storage, particularly through the Virtual Power Plant (VPP) incentive, which can add savings of between $400 and $1,500 for eligible households connecting their battery to a participating VPP.
There are also specific grants, such as the NSW Solar for Apartment Residents grant, offering up to 50% funding or grants of up to $150,000 for eligible apartment buildings and strata schemes.
South Australia
Similar to NSW, the federal STC rebate is the main incentive for solar panels in South Australia. For a 6.6kW system, the STC discount is approximately $2,000.
The City of Adelaide offers additional PV rebates for concession card holders, tenanted, or strata-managed residential properties: 20% up to $1,000 for systems from 1.5 kW to <10 kW, up to $2,500 for 10 kW to <20 kW systems, and up to $5,000 for systems >20 kW.
Queensland, Western Australia, Tasmania, ACT, and Northern Territory
For homeowners in Queensland, Western Australia, Tasmania, the ACT, and the Northern Territory, the federal STC rebate is generally the sole or primary government incentive for solar panel installations in 2026. While some previous state-specific programs may have existed, current information indicates a reliance on the national scheme for solar PV. Average costs for a 6kW system in Brisbane are around $5,570, while a 5kW system in Western Australia averages approximately $4,399.
Components of a Solar System and Their Costs
Understanding what you’re paying for is crucial:
- Solar Panels (PV Modules): These convert sunlight into electricity. Prices range from $80 to over $300 per panel depending on brand and wattage. Budget-friendly options like Jinko Solar (Tiger Neo), Trina Solar (Vertex S+), and Seraphim typically retail for under $150 per panel, offering good value. Premium, high-efficiency panels from brands like SunPower (Maxeon 6) and REC (Alpha Pure-RX) can cost $250–$300+ per panel.
- Solar Inverter: Converts the DC electricity from panels into usable AC electricity for your home. String inverters from brands like Sungrow and GoodWe for a 5kW system typically cost $1,000 to $1,400. Premium string inverters from Fronius and SMA can range from $1,800 to $2,500. Microinverters (e.g., Enphase) or power optimisers (e.g., SolarEdge) offer panel-level optimisation but add to the overall system cost.
- Mounting System & Cabling: The hardware that secures panels to your roof and the electrical wiring. These are essential but typically included in the overall installation cost.
- Installation & Labour: The cost of professional installation by CEC-accredited installers. This varies based on roof type, complexity, and location.
The Role of Solar Batteries and Their Costs
Adding a solar battery significantly enhances your system’s value by allowing you to store excess daytime solar generation for use at night or during peak tariff periods. In 2026, the average installed price for a quality 10-14 kWh home battery storage system typically sits between $8,000 and $13,000 after the federal rebate. Before incentives, expect to pay $9,000 to $15,000.
Key battery models and their installed costs in 2026 include:
- Tesla Powerwall 3: Installed price typically $13,500 – $16,500, with the unit (battery + integrated inverter) alone costing $11,500 – $13,500, plus a mandatory Tesla Backup Gateway for approximately $1,950. Tesla also offers a direct manufacturer rebate of $750 to $1,500.
- Sungrow SBR Series, Enphase IQ Batteries: These are popular modular options, with pricing varying by capacity. Generally, a 10kWh system will fall within the average range mentioned above.
Federal “Cheaper Home Batteries Program” – Critical Changes from May 1, 2026
Launched in July 2025, the federal “Cheaper Home Batteries Program” offers an upfront discount of around 30% on eligible small-scale battery systems (5 kWh to 100 kWh) via STCs.
However, a significant change is coming on May 1, 2026. The STC deeming period factor for batteries will drop from 8.4 to 6.8, and larger batteries will face tapered rebates. This means the rebate value for larger systems will be substantially reduced after this date. For example, a 30kWh battery system could see thousands of dollars less in rebate value. If you’re considering a battery, acting before April 30, 2026, could secure a higher rebate.
For a detailed breakdown of these changes and state-specific eligibility, refer to our guide: Australia’s New Tiered Home Battery Rebates (Post-May 2026): Your State-by-State Eligibility Guide.
Solar Feed-in Tariffs (FiT)
Feed-in tariffs are the credits you receive from your energy retailer for excess solar electricity exported to the grid. These vary significantly by state and retailer:
- NSW: Typically ranges from 4c to 10c per kWh. The Independent Pricing and Regulatory Tribunal (IPART) sets a benchmark of 4.8 to 7.3 cents per kWh for 2025-26.
- Victoria: Retailer-set tariffs generally range from 1.0c to 11c per kWh.
- South Australia: Ranges from 2c to 10c per kWh.
High self-consumption (using your solar power directly) and battery storage are increasingly important given the relatively low FiT rates, maximising your savings by avoiding buying expensive grid power.
Getting Accurate Quotes and Maximising Your Investment
To get the most accurate pricing, gather at least three quotes from CEC-accredited solar installers. Ensure quotes are detailed, specifying panel brands and models, inverter type, warranty details, and clearly outlining the STC rebate applied. Don’t solely focus on the cheapest price; consider the installer’s reputation, product warranties, and after-sales service.
Many providers also offer financing options, including green loans, Power Purchase Agreements (PPAs), or green mortgages, to help manage the upfront cost. Explore these in our comprehensive guide: Best Solar Panel & Home Battery Financing Options in Australia 2026: Loans, PPAs & Green Mortgages Explained.
Bottom Line
Despite annual reductions in federal STC values and upcoming changes to battery rebates, solar panels in Australia in 2026 remain a sound investment for homeowners. The average installed cost for a 6.6kW system is $5,000 - $6,000 after federal rebates, offering significant long-term savings against ever-increasing grid electricity prices. Adding a battery, despite its $8,000 - $13,000 price tag (post-rebate), amplifies these savings and provides greater energy independence. Prioritise reputable, CEC-accredited installers and obtain multiple detailed quotes to ensure a quality system that delivers value for decades. Consider installing a battery before the May 1, 2026, rebate changes if you’re aiming for a larger storage solution.