Last update June 12th, 2026 at 02:39 pm
Solar remains one of the smartest financial decisions an Australian homeowner can make in 2026. Electricity prices continue to rise, panel technology keeps improving, and government rebates — while gradually reducing — still take thousands off your upfront cost. However, working out exactly what you’ll pay involves more than a single number. This guide breaks down the real costs by system size and state, explains how rebates work in 2026, and covers the key factors that influence what installers quote you.
The Average Cost of Solar in 2026
For most Australian homes, a 6.6kW system remains the most popular choice. In 2026, a quality, fully installed 6.6kW system typically costs between $4,000 and $6,500 after the federal STC rebate, with the national average sitting around $5,000 to $6,000 across most major cities. That works out to roughly $0.88 to $0.95 per watt installed — a useful benchmark when comparing quotes.
For larger households or those planning to charge an electric vehicle, a 10kW system generally ranges from $8,000 to $10,500 after rebates.
Cost by State and Territory
Prices vary across Australia, primarily due to differences in labour costs, STC zone ratings, installer density, and connection fees.
- New South Wales: A 6.6kW system typically costs between $5,000 and $6,500 after rebates. NSW is in STC Zone 2, which generates a solid rebate value.
- Victoria: Prices range from approximately $5,000 to $6,800. Victoria falls in STC Zone 3, attracting a moderately lower rebate — though eligible households can access an additional $1,400 through the Solar Homes Program, which can shift the final cost significantly.
- Queensland: One of Australia’s most competitive solar markets. A 6.6kW system typically costs $4,500 to $6,000 after rebates. Brisbane sits in Zone 2; areas north of Rockhampton fall into Zone 1, attracting even higher STC values.
- South Australia: Expect to pay between $5,000 and $6,800 after rebates. SA is in Zone 2, and the City of Adelaide offers additional rebates for concession card holders.
- Western Australia: Prices typically range from $5,200 to $7,000. Despite being in Zone 1 (which generates the most STCs), WA sees higher costs due to transportation and a more limited installer pool in regional areas.
- Tasmania: The most expensive state for solar on average, with a 6.6kW system typically ranging from $5,800 to $7,500. Tasmania sits in Zone 4, which generates the fewest STCs due to lower solar irradiance — though Aurora Energy’s feed-in tariff is among the most generous in Australia.
- Northern Territory: Despite falling in Zone 1 and generating the highest STC values, Darwin and Alice Springs typically see prices of $6,000 to $8,000. Cyclone-rated mounting hardware, strict grid connection requirements, and a limited installer pool all push costs up.
- Australian Capital Territory: Prices are broadly similar to NSW, ranging from $5,000 to $6,800. The ACT Next Generation Energy Storage Program also offers battery incentives for those adding storage.
What Affects Solar Pricing in 2026?
There are a number of different factors that will affect your solar costs. We will now take a closer look at some of them.
1. System Size
System size has the biggest influence on overall cost. As a general guide:
- 3kW systems: $3,000–$4,500 — suited to small households with low consumption
- 6.6kW systems: $4,000–$6,500 — the most popular residential size
- 10kW systems: $8,000–$10,500 — suited to larger households or EV charging
- 13kW systems: $10,000–$15,000 — high-consumption homes or those planning for future battery storage
2. Panel and Inverter Quality
Not all panels are equal. Budget Tier 1 panels from brands such as Jinko, Trina, and Seraphim typically retail between $80 and $150 per panel, while premium options like REC and SunPower sit above $250. High-efficiency monocrystalline panels cost more upfront but produce more energy per square metre and tend to perform better over the long term.
Inverter choice also matters. String inverters are the most affordable option. Microinverters and power optimisers cost more but offer better performance on roofs with partial shading or complex orientations.
3. The Federal STC Rebate
The federal Small-scale Renewable Energy Scheme (SRES) delivers an upfront discount via Small-scale Technology Certificates (STCs). Your installer calculates and applies this discount directly to your quote — there’s no separate application required.
In 2026, two important changes have reduced the rebate value compared to previous years. First, from 1 January 2026, the deeming period dropped from 6 years to 5 years, reducing the STC count for a typical 6.6kW system by around 9 certificates — a reduction of approximately $340–$500 depending on your zone and the current STC market price. Second, battery rebates under the same scheme changed further from 1 May 2026 (covered in the battery section below).
For a typical 6.6kW solar-only system in 2026, the STC rebate reduces your cost by approximately $1,500 to $2,500, depending on your location. The scheme continues to step down each year and is scheduled to close at the end of 2030. The number of STCs your system earns depends on three things: system size, STC zone, and the deeming period remaining. The four STC zones are:
- Zone 1 — QLD, WA, NT (highest STC value — most sunshine)
- Zone 2 — NSW, SA (high value)
- Zone 3 — VIC, ACT (moderate value)
- Zone 4 — TAS (lowest value)
To get an estimate of your rebate based on your system size and location, we’ve developed an STC Calculator as a guide.
4. State-Based Incentives
Several states offer additional incentives on top of the federal STC rebate. Victoria’s Solar Homes Program provides up to $1,400 for eligible households. The ACT offers support through its Next Generation Energy Storage Program. South Australia provides additional rebates for concession card holders in the City of Adelaide. NSW no longer offers a standalone state solar rebate in 2026 — only the federal STC applies.
Rebates change frequently, so it’s worth checking current eligibility before committing to an installation.
5. Installer Pricing
Two quotes for the same system can vary by thousands of dollars. The main reasons include roof complexity (steep pitches, tile roofs, and multi-storey homes can add $500–$2,000), local labour rates, and the quality of components used. Established installers with a strong track record may charge more, but typically offer better workmanship guarantees and longer-term support. A useful benchmark: in 2026, most quality installations sit between $0.88 and $0.95 per watt. A quote significantly below that range warrants careful scrutiny.
6. Market Forces
Solar panel prices have continued to fall in 2026, with module costs dropping around 15% from 2025. However, the Australian dollar’s value against major currencies, global supply chain conditions, and trade tariffs can all influence the final price of imported panels. Most solar panels installed in Australia are manufactured overseas, so currency fluctuations can push prices up or down.
Is Solar Still Worth It in 2026?
At current electricity prices — averaging 30 to 40 cents per kWh across most Australian states — most homeowners recoup their solar investment within 3 to 5 years. A quality 6.6kW system has a lifespan of 25 years or more, meaning the majority of its working life delivers effectively free electricity. Furthermore, solar consistently reduces electricity bills by 60–90% in the first year for most households.
The key is choosing a quality system from a reputable, SAA-accredited installer and understanding that the cheapest quote doesn’t always deliver the best long-term outcome.