Is Solar Worth It in Australia in 2026? An Honest Answer
Feed-in tariffs have collapsed to 2–12¢/kWh while import rates hit 28–45¢. The honest solar economics: it still pays — but only if you understand the self-consumption shift.
For most Australian households, yes — solar panels are still worth it in 2026. The typical payback on a quality 6.6 kW system is 4.5 to 6.5 years depending on your state, against a 25-year panel warranty. That is a strong return on any home improvement.
But the mechanics have changed in ways most buyers have not caught up with — and if you run the numbers the old way, you will be disappointed.
Quick answer: A 6.6 kW system in Zone 3 (Sydney/Melbourne) costs roughly $7,920 installed, receives an STC rebate of approximately $1,640, and has a net cost of about $6,280. At 30% self-consumption, a 32¢/kWh import rate, and a 6¢/kWh feed-in tariff, it saves approximately $1,257 in year 1 — a five-year simple payback. That payback drops to 4.2 years if you shift loads to lift self-consumption to 40%. Self-consumption is the whole game now.
Is solar still worth it with low feed-in tariffs?
Yes — but only if you understand why the model changed.
Ten years ago, solar made money two ways: a generous upfront rebate and a premium feed-in tariff that paid 40–60¢ for every kilowatt-hour you sent back to the grid. Both are gone. The feed-in tariff in most of Australia is now 5–8¢/kWh from competitive retailers, and as low as 2.25¢/kWh in Western Australia under Synergy's Distributed Energy Buyback Scheme (Synergy, July 2026). The Victorian Essential Services Commission sets a minimum guaranteed rate of just 4.9¢/kWh for 2026/27 (ESC Solar Minimum Feed-in Tariff determination).
At the same time, grid electricity prices have risen sharply. The national flat-rate average is approximately 30–35¢/kWh, with South Australia reaching 40–49¢/kWh (AER Default Market Offer 2025–26).
The combined effect: the spread between what solar saves you (avoiding a 32¢/kWh import) and what you earn by exporting it (6¢/kWh) has never been wider — roughly 26¢/kWh on a typical NSW bill. That is good news and bad news at the same time.
Good news: each kilowatt-hour you use in your home during daylight hours is worth more than ever.
Bad news: each kilowatt-hour you send back to the grid earns almost nothing — well below what it costs to buy it back at night.
Solar's value has shifted entirely to self-consumption — electricity you generate and use in the same moment, rather than electricity you export and hope to earn something back on. The old "earn money selling to the grid" model is effectively dead. The question is no longer how much you can export, but how much of your own electricity you can displace.
How much will I save? What's the payback?
Solar savings are calculated differently from how most installers quote them — and getting this wrong is why many households are disappointed when their first bill doesn't match expectations.
The correct formula:
Annual savings = (self-consumed kWh × import rate) + (exported kWh × feed-in tariff)
Not: total generation × import rate. That overstates savings by a wide margin.
For a 6.6 kW system in Zone 3 generating 9,108 kWh in year 1:
- At 30% self-consumption, 32¢ import rate, 6¢ FiT: 2,732 × $0.32 + 6,376 × $0.06 = $874 + $383 = $1,257/yr
- Applying the import rate to all generation: 9,108 × $0.32 = $2,915/yr — more than double the real figure
The $1,658 difference between those two numbers is entirely explained by valuing exports at 6¢ rather than 32¢. This is the single most common error in solar quotes and online calculators.
How self-consumption changes your payback
Self-consumption is the lever you can actually pull without buying a battery. Here is the impact on a 6.6 kW Zone 3 system at $6,280 net cost, 32¢ import rate, 6¢ FiT:
| Self-consumption | What it means | Year 1 saving | Simple payback |
|---|---|---|---|
| 20% | Most generation exported | $1,020/yr | 6.2 years |
| 30% | Typical without battery | $1,257/yr | 5.0 years |
| 40% | Daytime load shifting | $1,494/yr | 4.2 years |
| 50% | Consistent daytime use | $1,730/yr | 3.6 years |
| 70% | Battery + load shifting | $2,204/yr | 2.9 years |
6.6 kW, Zone 3, 1,380 kWh/kW/yr, 0.5%/yr panel degradation, 32¢ import rate, 6¢ FiT. Zone yield from Clean Energy Regulator zone data. Installed cost from SolarQuotes national installer averages, July 2026.
Moving from 30% to 40% self-consumption cuts nearly a year off payback — and costs nothing if it is achieved through scheduling rather than a battery purchase.
Practical ways to lift self-consumption to 40–50%:
- Run the dishwasher, washing machine, and dryer between 10 am and 3 pm
- Set electric hot water to heat at midday (a timer or smart controller costs $30–80)
- Charge an EV from solar when it is parked at home during the day
- Pre-cool or pre-heat the house in the solar window rather than late afternoon
Run your own numbers in the Solar Payback & Savings Calculator → — enter your system size, electricity usage, import rate, feed-in tariff, and zone to get a savings projection and payback period specific to your household. The calculator handles the self-consumption split correctly.
What size solar system do I need?
The right system size depends on your annual electricity usage and how much of it you want solar to cover — not simply the largest system that fits on your roof.
A household using 6,000 kWh/year targeting 80% annual offset in Zone 3 needs about 3.5 kW. A household using 8,000 kWh/year at the same offset needs roughly 4.6 kW. The default 6.6 kW recommendation is sized for three-to-four people using around 7,500–8,000 kWh/year targeting full annual offset.
Why oversizing is not automatically better: a larger system generates more kWh, but if your household cannot absorb extra daytime generation, that extra output earns only 5–8¢/kWh on the grid. The payback per dollar is highest for the kW that replaces grid imports; it falls for kW that primarily generate cheap exports. The sweet spot is a system sized so that typical daytime load absorbs most of typical-day generation.
Use the Solar System Size Estimator → to calculate the right kW for your usage, target coverage, and zone — with a panel count and roof area estimate. Then bring that number into the payback calculator.
How much does solar cost in 2026?
A quality 6.6 kW solar system — Tier-1 panels and a warranted inverter — costs approximately $7,500–$8,500 installed before rebate across most Australian capital cities as at mid-2026, according to SolarQuotes national installer averages. After the STC rebate (see below), the typical net cost is $5,900–$6,900.
Cost varies by state, roof complexity, inverter brand, and panel efficiency tier:
| System size | Gross installed cost | STC rebate (Zone 3) | Approx. net cost |
|---|---|---|---|
| 3 kW | ~$3,800–$4,500 | ~$745 | ~$3,055–$3,755 |
| 5 kW | ~$5,500–$6,500 | ~$1,245 | ~$4,255–$5,255 |
| 6.6 kW | ~$7,500–$8,500 | ~$1,640 | ~$5,860–$6,860 |
| 10 kW | ~$9,500–$11,500 | ~$2,485 | ~$7,015–$9,015 |
Gross cost estimates from SolarQuotes July 2026. STC rebate uses Zone 3 rating 1.382, 5 deeming years, $36/STC net. Costs are for quality mid-market systems; budget installs or premium components will differ. Always verify with at least three CEC-accredited installer quotes.
Prices have been falling roughly 5–8% per year as the market matures, though the rate of decline has slowed. For a detailed breakdown of what drives solar cost, what to look for in quotes, and red flags to avoid — including inverter brands, panel warranties, and CEC accreditation requirements — see our forthcoming Complete Guide to Solar Panel Costs in Australia.
Should I wait for better rebates or technology?
No — for most households, waiting costs money.
Two forces run against you if you delay:
1. The STC rebate declines every January. The federal rebate is delivered through Small-scale Technology Certificates (STCs), administered by the Clean Energy Regulator. The rebate formula is: STCs = system kW × zone rating × deeming years. The deeming period steps down by one year every 1 January, which means the rebate shrinks every year until the scheme ends on 31 December 2030.
| Install year | Deeming years | Approx. rebate (6.6 kW, Zone 3) |
|---|---|---|
| 2026 | 5 years | ~$1,640 |
| 2027 | 4 years | ~$1,310 |
| 2028 | 3 years | ~$985 |
| 2029 | 2 years | ~$655 |
| 2030 | 1 year | ~$330 |
| 2031+ | 0 | No rebate |
Zone rating 1.382, $36/STC net. STC spot price fluctuates — verify with your installer. Source: CER, how STCs work.
Waiting from 2026 to 2027 costs approximately $330 in lost rebate on a 6.6 kW Zone 3 system — equivalent to about three extra months of payback. Over four years of waiting, you lose the entire rebate and forfeit four years of bill savings. Installed costs have been falling, but at 5–8%/year, that fall does not offset the combined rebate decline and foregone savings.
2. Future technology is not a sufficient reason to wait. Battery prices are falling and panel efficiency is improving, but waiting for the "next generation" is an evergreen argument that has no terminal point. The panels available today carry 25-year warranties. The economics today are already positive for most households. If there is a meaningful efficiency jump or a dramatic price fall, you can consider adding panels later — most modern inverters accept additional panels.
The one genuine reason to wait: if your rooftop solar tariff rate is expected to improve with a future state scheme or virtual power plant product, and you can quantify that improvement concretely. In most states, that is not the situation — FiTs are flat or declining.
Who solar is NOT for
Honesty is more useful than a blanket "everyone should get solar" pitch. For some households, the economics are weaker or the timing is wrong:
Low daytime usage. If nobody is home between 9 am and 4 pm on weekdays — no home worker, no EV charging, no midday dishwasher — self-consumption will be 15–20% rather than 30–40%. At 15% self-consumption, the 6.6 kW Zone 3 payback stretches to 7+ years. A smaller system sized to what you can actually absorb delivers better economics than a large system exporting cheap power.
Heavily shaded roof. Shading from trees, chimneys, neighbouring buildings, or dormer windows reduces output significantly and can cause inverter-level losses if string panels (not microinverters) are used. A 30% shading loss on a $8,000 system means your effective output is equivalent to a smaller, cheaper system. Get a shading assessment — not just a visual estimate — before committing.
Planning to move within two to three years. Solar likely adds resale value (see below), but it takes at least two to three years of bill savings to recover the net installation cost on most systems. If you are selling before the payback period, you are relying entirely on the property premium. That premium is real but not guaranteed to fully cover installation costs in every market and property type.
Very small roof or unusual orientation. A south-facing roof in Melbourne or an east-only roof with significant pitch limitations will generate substantially less than the zone yield figures used in standard calculations. If your usable north-facing roof cannot accommodate at least 3 kW of panels, the economics become marginal at higher installed cost per kW.
Renters. Without ownership of the property, the financial case for solar is not yours to make. Some state programs are exploring solar access for renters via community solar, but as at July 2026, these schemes remain limited. This is a decision for your landlord.
Does solar increase your home's value?
Yes — and the data is now specific enough to be useful.
A 2025 study by Cotality (formerly CoreLogic) in partnership with Commonwealth Bank of Australia found that Australian homes with rooftop solar sold for a 2.7% premium compared to otherwise comparable homes — an average dollar value of approximately $23,100 per home across Australian capital cities.
The premium makes logical sense. A buyer purchasing a home with solar is acquiring a guaranteed bill reduction from day one, with the capital cost already embedded in the property. They are also acquiring a system with remaining warranty life (typically 20–25 years on panels, 5–10 years on inverters).
Some practical caveats:
- The premium is an average and varies by suburb, property type, and local electricity prices. In high-electricity-cost areas like Adelaide and Brisbane, the premium is likely above average. In lower-cost areas, it may be below.
- Older or poorly maintained systems, or systems with expired inverter warranties, may not command the same premium as a recent quality installation.
- This is correlated data — properties where owners invested in solar may differ in other maintenance and quality attributes. The solar premium is likely real but the magnitude should not be taken as guaranteed.
The resale value angle does not change the fundamental economics (bill savings remain the primary driver of return), but it is a legitimate secondary benefit — particularly relevant for households who might move within five years and are concerned about not fully recovering the installation cost through bill savings alone.
State by state: the spread is wide
Solar economics vary significantly across Australia because generation yield (set by your zone), electricity import rates, and feed-in tariffs all differ by state.
| State | Zone | Year 1 gen (6.6 kW) | Import rate | FiT | STC rebate | Net cost | Year 1 saving* | Payback* |
|---|---|---|---|---|---|---|---|---|
| SA (Adelaide) | 3 | 9,108 kWh | ~42¢ | ~6¢ | ~$1,640 | ~$6,280 | ~$1,530/yr | ~4.1 yr |
| QLD (Brisbane) | 2 | 10,230 kWh | ~30¢ | ~6¢ | ~$1,825 | ~$6,095 | ~$1,352/yr | ~4.5 yr |
| NSW (Sydney) | 3 | 9,108 kWh | ~32¢ | ~6¢ | ~$1,640 | ~$6,280 | ~$1,257/yr | ~5.0 yr |
| WA (Perth) | 2 | 10,230 kWh | ~32¢ | 2.25¢ | ~$1,825 | ~$6,095 | ~$1,143/yr | ~5.3 yr |
| VIC (Melbourne) | 3 | 9,108 kWh | ~30¢ | ~5¢ | ~$1,640 | ~$6,280 | ~$1,139/yr | ~5.5 yr |
| TAS (Hobart) | 4 | 7,260 kWh | ~27¢ | ~6.9¢ | ~$1,408 | ~$6,512 | ~$939/yr | ~6.9 yr |
Assumptions: 6.6 kW system, $7,920 gross installed cost, 30% self-consumption, 0.5%/yr panel degradation. Import rate and FiT are approximate mid-2026 residential averages. Zone yields from CER zone data; installed cost from SolarQuotes July 2026; SA and NSW import rates from AER Default Market Offer 2025–26; WA FiT from Synergy DEBS; VIC minimum FiT from ESC; TAS from Aurora Energy. Always verify your specific rates against your electricity bill.
South Australia is the standout. SA residential tariffs are among the highest in the developed world, regularly exceeding 40¢/kWh on standard tariffs. Each self-consumed kilowatt-hour is worth more than anywhere else in Australia, compressing the payback to around four years even though SA's Zone 3 yield is identical to Sydney's.
Queensland and WA benefit from Zone 2 yield. Both sit in Zone 2, meaning each installed kW generates about 1,550 kWh per year versus 1,380 kWh in Zone 3 — an extra 1,120 kWh from the same 6.6 kW system. Note that regional QLD (Ergon network) has a QCA-mandated feed-in tariff of 6.006¢/kWh from 1 July 2026, down from 8.66¢/kWh in 2025–26 — a meaningful reduction for regional customers.
Western Australia requires special attention. Synergy's DEBS pays only 2.25¢/kWh for exports — the lowest structured feed-in rate in Australia. Self-consumption is even more critical in WA than anywhere else. At 50% self-consumption the WA payback drops to around 3.5 years; at 20% it extends to 7+ years. WA households should size their system to their daytime usage, not total usage.
Tasmania is the weakest case due to lower solar yield (Zone 4, 1,100 kWh/kW/yr) and lower grid prices. At nearly seven years payback at average assumptions, it still makes financial sense over a 25-year panel life, but the margin is thinner and oversizing is less justified.
Solar first, or battery first?
Solar comes first — always.
A battery stores daytime solar surplus for use at night. Without solar panels, charging a battery from the grid only makes sense with a very wide time-of-use tariff spread and high overnight usage discipline. Most households do not have either.
The correct sequence: install an appropriately sized solar system. Run it for at least 12 months to understand your actual daily export — how many kWh your panels send to the grid on an average day. Then use that data to evaluate whether a battery is justified and what size makes sense.
Whether a battery makes financial sense on its own is a separate question — and the honest answer is that for most households on flat tariffs, it still does not pay within the 10-year battery warranty unless combined with time-of-use tariffs, state incentives, and a Virtual Power Plant contract. The full analysis is in Is a Home Battery Worth It in Australia in 2026?
Before you commit: five things to check
1. Your annual electricity usage. Read the total kWh from your last four quarterly bills. This is the primary sizing input — use the Solar System Size Estimator to convert usage into a target system size.
2. Your electricity import rate. Check your bill for the per-kWh consumption rate (not the daily supply charge). This is the figure that drives your savings more than any other single variable.
3. Your feed-in tariff. If your bill does not show it, call your retailer or check their website. If it is below 3¢/kWh, maximise self-consumption and consider whether load scheduling could significantly change your numbers.
4. Roof orientation and shading. North-facing delivers the highest annual yield; east-west split is viable but reduces output by roughly 15–20% versus north-facing at the same pitch. Shading from trees, chimneys, or adjacent structures reduces output and can cause string-level losses on non-microinverter systems. Insist on a proper shading assessment — not just a visual look.
5. Get three quotes from CEC-accredited installers. Mid-market installed cost for a quality 6.6 kW system is approximately $7,500–$8,500 before rebate in mid-2026 with Tier-1 panels (SolarQuotes). Quotes significantly outside this range warrant scrutiny. Verify panel brand tier, inverter brand and warranty, CEC accreditation of the installer, and what the warranty covers if the installer business closes.
Frequently asked questions
Is solar still worth it in Australia in 2026?
For most households, yes. The typical payback on a quality 6.6 kW system is 4.5–6.5 years against a 25-year panel warranty. The key change is that solar value now comes almost entirely from electricity you self-consume during daylight hours, not from export earnings. Feed-in tariffs have fallen to 2–8¢/kWh depending on state, while grid import rates have risen to 28–45¢/kWh. The spread between those two numbers — the self-consumption premium — is what makes solar economics work in 2026.
Is solar still worth it with such low feed-in tariffs?
Yes, but only if you structure your usage around self-consumption. The old model of earning significant money from grid exports is gone. A kilowatt-hour you export earns roughly 6¢; a kilowatt-hour you use yourself avoids paying roughly 32¢ — more than five times the value. Households that shift daytime appliance use into the solar window (dishwasher, washing machine, hot water, EV charging between 10 am and 3 pm) can reach 40–50% self-consumption and achieve paybacks of 3.6–4.2 years. Households that cannot shift usage and export most of their generation will see 6–7 year paybacks at current tariffs.
Should I wait for better rebates or solar technology?
No, for most households. The STC rebate declines by roughly $330 per year on a 6.6 kW Zone 3 system and reaches zero after 31 December 2030. Every year you wait also means another year of paying full grid prices. Installed costs have been falling at about 5–8% per year, which partially offsets the rebate decline, but not the foregone bill savings. Future panel efficiency improvements are incremental at this stage — modern Tier-1 panels are already highly efficient, and they carry 25-year warranties. "Waiting for better technology" is an evergreen argument with no natural endpoint.
Which Australian state has the best solar economics?
South Australia offers the strongest economics in 2026 because of its exceptionally high electricity prices, which regularly exceed 40¢/kWh on standard residential tariffs. A 6.6 kW system in Adelaide pays for itself in approximately 4.1 years at 30% self-consumption. Queensland and Perth also benefit from Zone 2 solar yield — higher generation per installed kW — which shortens payback through volume. Western Australia is a special case: excellent yield but the Synergy DEBS pays only 2.25¢/kWh for exports, making self-consumption more critical than anywhere else in Australia.
Who is solar NOT right for?
Solar is a weaker proposition if you have low daytime usage (nobody home during peak solar hours and no load-shifting opportunity), a heavily shaded roof (a shading assessment is essential before quoting), or if you are planning to sell within two to three years and cannot rely on bill savings to recover the install cost before then. Very small usable roof areas, south-facing roofs in southern states, and rented properties are also cases where solar may not be suitable or viable. A smaller system sized to actual daytime consumption generally outperforms an oversized system with heavy export at current feed-in rates.
Does solar increase your home's value?
Yes. A 2025 study by Cotality (formerly CoreLogic) in partnership with Commonwealth Bank of Australia found that Australian homes with rooftop solar sold for an average 2.7% premium compared to comparable homes without solar — approximately $23,100 per home. The premium is logical: a buyer acquires guaranteed bill reductions from day one with the capital cost already embedded in the property price. The premium varies by location and system age, and is likely strongest in high-electricity-cost areas like South Australia and South East Queensland.
How does the STC rebate work and when does it end?
The STC (Small-scale Technology Certificate) rebate is delivered through the federal Small-scale Renewable Energy Scheme. Your installer creates STCs based on your system size, solar zone, and remaining deeming years, then applies their value as an upfront discount. In 2026, the deeming period is 5 years — down from 6 in 2025. The formula is: STCs = system kW × zone rating × deeming years. For a 6.6 kW system in Zone 3 (zone rating 1.382), that is approximately 45 STCs worth about $36 each net — around $1,640 total. The deeming period steps down by one year every 1 January and reaches zero after 31 December 2030, after which no STC rebate applies.
How accurate is the solar payback calculator?
The Solar Payback & Savings Calculator uses the correct self-consumption split: self-consumed kWh valued at your import rate, exported kWh at your feed-in tariff. This avoids the common error of applying the import rate to all generation, which can overstate annual savings by 100% or more. Zone yields (1,650 kWh/kW for Zone 1 through 1,100 kWh/kW for Zone 4) are from Clean Energy Regulator zone data. The STC rebate uses the live formula (zone rating × system kW × deeming years × net STC price). Treat results as directional estimates — actual output depends on your specific roof orientation, pitch, shading, and inverter quality.
This article is for general information only and does not constitute financial, energy, or investment advice. Individual circumstances vary significantly. Electricity tariffs, feed-in rates, STC spot prices, and incentive schemes change frequently — verify all figures with your installer and energy retailer before making a purchase decision. Figures cited are as at July 2026. Consult a CEC-accredited installer and, where appropriate, a licensed financial adviser before committing to a solar installation.
Written by
Mahi PatilSoftware engineer & personal finance enthusiast · Melbourne, Australia
Built Dolaro.com.au to create accurate, free Australian finance tools. Invests in Australian and global ETFs and writes about the topics researched firsthand. More about Mahi →