A 10kW solar system in Australia costs about A$8,410 to A$11,080 fully installed in seven of the eight capital cities as at November 2026, and A$9,830 on average nationally, according to the Solar Choice Price Index. Those prices are after the federal STC discount, worth roughly A$2,200 to A$2,800 at this size. Expect 20 to 24 panels, about 46 square metres of roof and 32 to 47 kWh a day depending on your city.
This is independent desk research. Solar Cobber did not request quotes, and no installer paid to be mentioned.
Key facts
- The Solar Choice Price Index for November 2026 puts the average installed price of a 10 kW solar system in Australia at A$9,830 after the STC discount, including GST.
- The November 2026 Solar Choice average for a 10 kW solar system runs from A$8,410 in Perth to A$11,080 in Hobart, with Darwin at A$14,930.
- A 10 kW solar system installed in Sydney, Brisbane, Perth, Adelaide or Canberra during 2026 earns 69 small-scale technology certificates (STCs), worth about A$2,620 to A$2,760 at A$38 to A$40 a certificate.
- From 1 January 2027 a 10 kW solar system in Sydney, Brisbane, Perth, Adelaide or Canberra earns 55 STCs instead of 69, about A$530 to A$560 less.
- A 10 kW solar system needs 23 panels at 440 W each (10.12 kW) or 20 panels at 500 W, and roughly 46 square metres of usable roof.
- Clean Energy Council guide figures put the average daily output of a 10 kW solar system at 37 kWh in Melbourne, 40 kWh in Sydney, 45 kWh in Brisbane and 47 kWh in Perth.
10kW solar system price list (November 2026)
A standard 10 kW solar system costs A$8,410 to A$14,930 depending on the capital city, and a premium one A$9,930 to A$18,250. The table shows Solar Choice Price Index averages dated 1 November 2026 (checked 12 November 2026), which include the STC discount and GST. The last two columns are our working at A$39.60 a certificate.
| Capital city | Standard 10 kW after STCs | Premium 10 kW after STCs | STCs in 2026 | Standard before STCs (approx.) |
|---|---|---|---|---|
| Perth | A$8,410 | A$9,930 | 69 | A$11,140 |
| Canberra | A$8,580 | A$10,160 | 69 | A$11,310 |
| Adelaide | A$8,610 | A$10,220 | 69 | A$11,340 |
| Sydney | A$8,810 | A$10,380 | 69 | A$11,540 |
| Melbourne | A$8,870 | A$10,330 | 59 | A$11,210 |
| Brisbane | A$9,350 | A$11,000 | 69 | A$12,080 |
| Hobart | A$11,080 | A$12,670 | 59 | A$13,420 |
| Darwin | A$14,930 | A$18,250 | 76 | A$17,940 |
SolarQuotes, on its 10 kW page updated 10 June 2026, puts a good quality 10 kW solar system slightly higher, at about A$10,000 to A$12,000 out of pocket. These are averages, not quotes.
What changes the price of a 10kW solar system
Equipment tier and site difficulty move a 10 kW solar system price most, with A$1,460 to A$3,320 separating standard and premium offers in the November 2026 Solar Choice index. Solar Choice estimates mainstream panels at A$80 to A$150 each and premium panels at A$250 or more (see our solar panel cost guide).
Three phase, hybrid and microinverter systems cost more than a single phase string inverter. Two storeys, tiles, several roof faces and an old switchboard add labour. Darwin and Hobart sit well above the mainland capitals.
How the STC discount applies to a 10kW system
The STC discount on a 10 kW solar system installed in 2026 is 59 to 76 certificates in the capitals, worth roughly A$2,240 to A$3,040. A small-scale technology certificate (STC) is a tradable certificate created under the federal Small-scale Renewable Energy Scheme, which you assign to your installer in return for an upfront discount.
The Clean Energy Regulator’s formula is system size in kW, multiplied by the postcode zone rating, multiplied by the deeming period, rounded down. The deeming period is 5 years in 2026 and 4 years in 2027.
- Sydney, Brisbane, Perth, Adelaide, Canberra (zone 3, rating 1.382): 10 x 1.382 x 5 = 69 STCs, or A$2,622 to A$2,760 at A$38 to A$40 each. In 2027: 55 STCs.
- Melbourne, Hobart (zone 4, rating 1.185): 59 STCs, or A$2,242 to A$2,360. In 2027: 47 STCs.
- Darwin (zone 2, rating 1.536): 76 STCs, or A$2,888 to A$3,040. In 2027: 61 STCs.
The Clean Energy Regulator’s clearing house price is fixed at A$40 excluding GST, and certificate trader Demand Manager showed a spot price of A$39.60 on 12 November 2026. Waiting until 2027 costs a zone 3 buyer 14 certificates, about A$530 to A$560. Our STC rebate explainer covers eligibility.
10kW solar system: how many panels and how much roof?
A 10 kW solar system uses 20 to 24 panels and needs about 46 square metres of usable roof. The count depends on panel wattage: 24 panels at 415 W (9.96 kW), 23 at 440 W (10.12 kW), 21 at 475 W (9.98 kW) or 20 at 500 W (10 kW).
Roof area assumes about 2 square metres per panel including gaps, as in our guide to what size solar system you need.
How much power does a 10kW solar system produce?
A 10 kW solar system produces roughly 32 to 47 kWh a day averaged over a year in the state capitals, or about 11,850 to 17,150 kWh a year. Clean Energy Regulator zone ratings are conservative because they set the rebate. Clean Energy Council figures, from its June 2020 business solar guide, are closer to a well-sited array.
| Capital city | Clean Energy Regulator deemed output (kWh/day) | Clean Energy Council guide output (kWh/day) |
|---|---|---|
| Darwin | 42 | 52 |
| Perth | 38 | 47 |
| Brisbane | 38 | 45 |
| Adelaide | 38 | 42 |
| Canberra | 38 | 42 |
| Sydney | 38 | 40 |
| Melbourne | 32 | 37 |
| Hobart | 32 | 34 |
These are annual averages: output is higher in summer and lower in winter.
Inverter sizing and export limits: single phase vs three phase
A 10 kW solar system is usually paired with an 8 kW or 10 kW inverter, and on single phase power most networks will connect it but cap fixed exports at 5 kW. An export limit is the maximum power your network lets your system send to the grid at any moment.
Under the one third oversizing rule in our sizing guide, 10 kW of panels needs at least a 7.5 kW inverter. The table shows residential limits from SolarQuotes’ state grid connection pages (updated September and October 2026) and Ausgrid’s solar page, checked 12 November 2026. Limits vary by street.
| Network | Single phase solar inverter limit | Single phase export | Three phase export |
|---|---|---|---|
| Ausgrid | 10 kW | 10 kW flexible, 3 kW fixed (new connections, late 2026) | 30 kW flexible |
| Endeavour Energy | Under 10 kW | 10 kW flexible, 5 kW fixed | 30 kW flexible |
| Essential Energy | 5 kW urban, 3 kW rural (automatic approval) | Usually 5 kW | Usually 5 kW |
| Energex, Ergon Energy | 10 kW | 5 kW fixed, 10 kW dynamic | 15 kW fixed, 30 kW dynamic |
| Victorian networks | 10 kW (Jemena, AusNet) | 5 kW | 15 kW |
| SA Power Networks | 10 kW | 10 kW flexible, 1.5 kW fixed | 30 kW flexible |
| Evoenergy | 10 kW | 5 kW | 15 kW |
| TasNetworks | 10 kW | 10 kW | 30 kW |
| Western Power | 30 kVA including battery | 1.5 kW to 5 kW | 1.5 kW to 5 kW |
| Power and Water | 10 kW (see below) | 5 kW | 7 kW |
In Western Australia, SolarQuotes reports (7 October 2026) that only systems with 5 kW or less of solar inverter capacity receive the Distributed Energy Buyback Scheme payment. In the Northern Territory, it reports an inverter above 5 kW must be three phase.
A 5 kW export limit does not waste a 10 kW solar system, because the house uses power before anything is exported. See single phase versus three phase power.
10kW vs smaller systems on price
A 10 kW solar system costs about A$0.98 per watt against A$1.06 for 6 kW, so the larger system is cheaper per unit of output. The table uses Solar Choice national averages for November 2026.
| System size | National average after STCs | Price per watt | Deemed output, zone 3 (kWh/year) |
|---|---|---|---|
| 6 kW | A$6,350 | A$1.06 | 8,292 |
| 7 kW | A$7,080 | A$1.01 | 9,674 |
| 10 kW | A$9,830 | A$0.98 | 13,820 |
For the standard size, see is a 6.6kW solar system right for you.
10kW solar system with battery
A 10 kW solar system with a 13.5 kWh battery works out at roughly A$16,000 to A$20,000 in Sydney in November 2026, after both federal discounts. That adds A$8,810 for solar to the A$11,000 to A$15,000 range in our battery cost guide, less 91 battery STCs worth A$3,460 to A$3,640.
The Cheaper Home Batteries Program factor is 6.8 STCs per usable kWh until 31 December 2026 and 5.7 from 1 January 2027, according to the Clean Energy Regulator. See solar and battery package prices.
Is a 10kW solar system worth it? A worked payback example
A 10 kW solar system pays for itself in about 4 to 7 years for a Sydney home that uses much of the power, but the extra panels over a 7 kW system take about 14 years to pay back if their output is all exported. This is our calculation.
Assumptions: Ausgrid network, A$8,810 installed (Solar Choice, November 2026); 13,820 kWh a year (Clean Energy Regulator deemed output); usage rate 33.1 c/kWh (Australian Energy Regulator 2026-27 Default Market Offer); feed-in tariff 4 c/kWh (within IPART’s 2026-27 benchmark of 3.4 to 6.5 c/kWh); no export clipping.
| Scenario | Used at home (kWh) | Exported (kWh) | Annual benefit | Simple payback |
|---|---|---|---|---|
| 40 per cent self-consumed | 5,528 | 8,292 | A$2,162 | 4.1 years |
| 20 per cent self-consumed | 2,764 | 11,056 | A$1,357 | 6.5 years |
| Extra 3 kW over 7 kW, all exported | 0 | 4,146 | A$166 | 13.9 years |
The third row is where 10 kW does not pay. The extra panels cost A$2,300 in Sydney and earn only export credits. Current rates are in our feed-in tariff tracker.
What to check on your 10kW quote
A sound 10 kW quote states the exact array size, inverter model and approved export limit. Check:
- Panel count, wattage and total kW.
- Inverter model, size and phase.
- The approved export limit, fixed or flexible.
- The number of STCs and the price per certificate.
- The retailer’s listing on the Clean Energy Council approved retailer list (New Energy Tech Consumer Code) and the installer’s on the Solar Accreditation Australia register. Check both yourself.
Star ratings will not separate installers: of the 1,222 rated companies in the Solar Cobber directory, 571 sit at exactly 5.0, as the five-star problem explains. Get three written quotes, read how to compare solar quotes, and browse our directory.
FAQ
How much does a 10kW solar system cost in Australia?
A 10 kW solar system costs A$9,830 on average in Australia as at November 2026, after the STC discount, according to the Solar Choice Price Index. City averages run from A$8,410 in Perth to A$14,930 in Darwin.
How many panels are in a 10kW solar system?
A 10 kW solar system has 23 panels at 440 W each, or 20 panels at 500 W.
How much power does a 10kW solar system produce per day?
A 10 kW solar system produces about 32 to 47 kWh a day on average across the year in the state capitals. Clean Energy Council guide figures range from 34 kWh in Hobart to 47 kWh in Perth.
Can I install a 10kW solar system on single phase power?
Yes, most Australian networks let a single phase home connect up to 10 kW of solar inverter capacity. Essential Energy, Western Power and Power and Water differ.
What is the 10kW single phase export limit?
The single phase export limit for a 10 kW solar system is 5 kW on a fixed connection with Energex, Ergon Energy, Evoenergy and the Victorian networks, as at September 2026. Ausgrid, Endeavour Energy and SA Power Networks offer flexible exports of up to 10 kW.
Is a 10kW solar system worth it?
A 10 kW solar system is worth it for households that use 25 kWh or more a day, charge an electric vehicle or plan a battery. It is poor value if almost all the extra output would be exported for a few cents per kWh.
Sources
- Solar Choice Price Index, November 2026
- SolarQuotes: 10 kW solar systems
- Clean Energy Regulator: calculate STC entitlements
- Clean Energy Regulator: postcode zone ratings
- Clean Energy Regulator: buy and sell STCs
- Demand Manager certificate prices
- Clean Energy Council: Guide to installing solar PV for business and industry
- SolarQuotes grid connection rules by state
- Ausgrid: choosing a solar system
- Australian Energy Regulator: Default Market Offer 2026-27
- IPART: solar feed-in tariff benchmark
About this guide
Written by the Solar Cobber editorial team from independent desk research, checked in November 2026. Solar Cobber is a free directory that may earn referral or advertising fees from installers. Commercial relationships never affect our content. Prices are published averages, not quotes, and nothing here is financial advice. Send corrections via /contact.
Filed under Solar Systems
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