An off-grid solar system in Australia costs about A$15,000 to A$30,000 for a small cabin, A$40,000 to A$70,000 for an average three to four bedroom home and A$70,000 to A$120,000 or more for a large home, as at November 2026. That is roughly two to five times the price of a grid-connected solar and battery system, and it is only the cheaper option when a grid connection quote is large.
This is independent desk research. We did not request quotes or test any system. Prices come from installer price pages and published guides, so treat them as ranges, not quotes.
Key facts
- As at November 2026, Energy Matters, an installer, lists off-grid systems at A$15,000 to A$30,000 for a 3 to 5 kW array with 10 to 15 kWh of battery, and A$40,000 to A$70,000 for 8 to 12 kW with 30 to 40 kWh.
- OffGrid WA, a Perth installer, advertised off-grid packages from A$19,000 (11.9 kW solar, 18.1 kWh battery) to A$99,900 (38 kW solar, 54.7 kWh battery) on 14 November 2026, with the estimated federal subsidy already deducted.
- The Clean Energy Regulator (updated 29 October 2026) allows the federal battery discount for one battery per lived-in off-grid dwelling, and a property more than 1 km from the grid does not need a virtual power plant (VPP) capable battery.
- Batteries are typically 40 to 50 per cent of an off-grid system’s cost, according to Energy Matters and Renoz Energy.
- Solar Cobber calculation: sized for a 25 kWh a day home, an off-grid array must be about 1.1 to 2.9 times larger than one sized to the annual average, because June sunshine in southern cities is a fraction of summer’s.
Source: Energy Matters (24 September 2026); OffGrid WA price page, checked 14 November 2026.
How much does an off-grid solar system cost in Australia?
An off-grid system costs from about A$15,000 for a weekender to over A$100,000 for a farm or large home, depending mainly on battery size. A stand-alone power system has no grid to fall back on, so the battery bank, an inverter-charger and usually a backup generator must carry every load through the worst week of the year.
The chart shows the published installed price ranges by property type from Energy Matters (24 September 2026).
- Low end
- High end
Source: Energy Matters, Off-Grid Solar System Cost Australia, 24 September 2026. The large-home range is stated as A$70,000 to A$120,000 or more, so the high end is a floor.
View the data as a table
| Low end | High end | |
|---|---|---|
| Small cabin (3 to 5 kW, 10 to 15 kWh) | A$15,000 | A$30,000 |
| Average home (8 to 12 kW, 30 to 40 kWh) | A$40,000 | A$70,000 |
| Large home (15 to 20 kW, 50 to 80 kWh) | A$70,000 | A$120,000 |
The cost roughly quadruples from a cabin to an average home and nearly doubles again for a large home, because battery capacity grows faster than panel capacity.
| Property type | Solar array | Battery bank | Installed cost | Source |
|---|---|---|---|---|
| Small cabin or weekender | 3 to 5 kW | 10 to 15 kWh | A$15,000 to A$30,000 | Energy Matters, Sept 2026 |
| Average 3 to 4 bedroom home | 8 to 12 kW | 30 to 40 kWh | A$40,000 to A$70,000 | Energy Matters, Sept 2026 |
| Large home or high use | 15 to 20 kW | 50 to 80 kWh | A$70,000 to A$120,000+ | Energy Matters, Sept 2026 |
| Tiny home or weekender (basic) | Not stated | Not stated | from about A$16,500, generator excluded, after rebates | RACV Solar, checked Nov 2026 |
| Single storey home | 6.6 kW | 16 kWh | about A$28,500, generator excluded, after rebates | RACV Solar, checked Nov 2026 |
Other guides sit in the same band: Commodore Australia (February 2026) lists a 10 kWh a day home at about A$35,000 or more and a 50 kWh a day property at about A$100,000 or more. These are installer guides, so we show ranges.
Real packages: what you get for the money
Published packages show where the money goes. OffGrid WA lists hybrid (grid-connected) and off-grid packages with sizes, and we calculated the price per listed battery kWh for each.
Source: OffGrid WA package price page, checked 14 November 2026; Solar Cobber calculation. Solar Cobber calculation: from price divided by listed battery kWh. Prices include the estimated federal subsidy for STC zone 3.
View the data as a table
| A$ per battery kWh | |
|---|---|
| OffGrid Deluxe (38 kW, 54.7 kWh) | A$1,826 |
| OffGrid Performance (19 kW, 45.6 kWh) | A$1,732 |
| Hybrid Basic (10 kW, 9 kWh) | A$1,493 |
| Hybrid Foundation (20 kW, 18 kWh) | A$1,410 |
| OffGrid Micro (11.9 kW, 18 kWh) | A$1,051 |
| OffGrid Essentials (19 kW, 36 kWh) | A$973 |
| Hybrid Performance (23.8 kW, 36 kWh) | A$938 |
| Hybrid Deluxe (31.8 kW, 54 kWh) | A$913 |
The two big off-grid packages cost about A$1,700 to A$1,800 for each battery kWh, nearly double the mid-size ones, because they add 10 kVA Victron inverter-chargers and much larger solar.
| Package (OffGrid WA) | Type | Solar | Battery | Inverter | From price |
|---|---|---|---|---|---|
| Hybrid Basic | Grid-connected | 9.975 kW | 9.04 kWh | 5 kW single phase | A$13,500 |
| Hybrid Foundation | Grid-connected | 19.95 kW | 18.08 kWh | 10 kW single phase | A$25,500 |
| Hybrid Performance | Grid-connected | 23.75 kW | 36.16 kWh | 15 kW three phase | A$33,900 |
| Hybrid Deluxe | Grid-connected | 31.825 kW | 54.24 kWh | 20 kW three phase | A$49,500 |
| OffGrid Micro | Off-grid | 11.875 kW | 18.08 kWh | 12 kW single phase | A$19,000 |
| OffGrid Essentials | Off-grid | 19 kW | 36.16 kWh | 12 kW single phase | A$35,200 |
| OffGrid Performance | Off-grid | 19 kW | 45.6 kWh | 10 kVA Victron | A$79,000 |
| OffGrid Deluxe | Off-grid | 38 kW | 54.72 kWh | 2 x 10 kVA Victron | A$99,900 |
These are advertised “from” prices, not quotes, and the page says they assume STC zone 3. Compare them with our guides to solar and battery package prices and large home battery prices.
What is in an off-grid system and what each part costs
An off-grid system has five cost blocks: panels, battery bank, inverter-charger, a backup generator and installation with mounting and cabling.
- Battery bank. The largest item at 40 to 50 per cent of the total, per Energy Matters and Renoz Energy. RACV Solar lists PowerPlus lithium batteries with 10 year warranties. See our explainer on LFP batteries and how long solar batteries last.
- Inverter-charger. Off-grid inverters must form their own grid and handle motor start-up surges. RACV lists the Selectronic SP PRO range from 3 kW to 240 kW. Separate prices are not published by the guides we read.
- Panels. Cheap per watt. Solar Choice’s November 2026 index puts a typical grid-connected 10 kW system at A$8,410 to A$14,930 installed by city, including the STC discount.
- Generator. Most off-grid designs include one for long overcast spells. Commodore Australia says a backup generator has an annual cost of around A$250, but no guide we read publishes a purchase price. Ask for it itemised.
- Installation. Ground mounts, trenching, long cable runs and remote travel add cost, according to installer guides.
How many panels do you need off-grid?
An off-grid array is sized for June, not for the average day, so it ends up much larger than a grid-connected one. Winter sunshine in Hobart is less than a quarter of its summer level, and the system must still fill the battery.
The Bureau of Meteorology publishes mean daily solar exposure by month. This is the working behind our calculation, using a 25 kWh a day household load, the June and annual-average figures from the pack, and an assumed 75 per cent allowance for inverter, battery and wiring losses.
- Sized for June
- Sized for annual average
Source: Bureau of Meteorology mean daily global solar exposure, all available years to 2026 (see pack); Solar Cobber calculation. Uses horizontal exposure. Tilted panels collect more in winter, so real arrays are smaller in the south. The 0.75 efficiency is our assumption.
View the data as a table
| Sized for June | Sized for annual average | |
|---|---|---|
| Darwin | 6.1 kW | 5.6 kW |
| Brisbane | 10.1 kW | 6.5 kW |
| Perth | 12.6 kW | 6.2 kW |
| Sydney | 13.8 kW | 7.3 kW |
| Canberra | 14.6 kW | 7.1 kW |
| Adelaide | 15.0 kW | 6.8 kW |
| Melbourne | 18.7 kW | 8.0 kW |
| Hobart | 25.1 kW | 8.7 kW |
Sizing for June needs about 6 kW in Darwin but 15 kW in Adelaide and 25 kW in Hobart on this flat-plane basis, which is why southern and Tasmanian off-grid systems lean on generators or on tilted arrays. See our guide to panel angle and orientation.
| City | June kWh/m2 per day | Annual kWh/m2 per day | kW for 25 kWh a day (June) | kW (annual average) | kW for 10 kWh a day cabin (June) |
|---|---|---|---|---|---|
| Darwin | 5.50 | 5.94 | 6.1 | 5.6 | 2.4 |
| Brisbane | 3.31 | 5.14 | 10.1 | 6.5 | 4.0 |
| Perth | 2.64 | 5.36 | 12.6 | 6.2 | 5.1 |
| Sydney | 2.42 | 4.58 | 13.8 | 7.3 | 5.5 |
| Canberra | 2.28 | 4.67 | 14.6 | 7.1 | 5.8 |
| Adelaide | 2.22 | 4.92 | 15.0 | 6.8 | 6.0 |
| Melbourne | 1.78 | 4.17 | 18.7 | 8.0 | 7.5 |
| Hobart | 1.33 | 3.83 | 25.1 | 8.7 | 10.0 |
Source: Bureau of Meteorology climate averages tables, checked 14 November 2026. Stations: Perth Metro, Brisbane, Sydney Airport, Canberra Airport, Adelaide Airport, Melbourne Airport, Hobart Airport West, Darwin Airport.
Off-grid vs a grid connection: which costs less?
Off-grid is cheaper up front only when the grid connection quote exceeds the gap between the two systems. Energy Matters prices a grid-connected solar and battery system for the same home at A$12,000 to A$20,000, against A$40,000 to A$70,000 off-grid.
Solar Cobber calculation: the gap for an average home is A$20,000 (A$40,000 minus A$20,000) to A$58,000 (A$70,000 minus A$12,000). If the network quotes more than that to extend poles and wires, off-grid wins on upfront cost, before ongoing bills.
Quotes vary hugely. Western Power’s standard obligation covers connections within 100 m of its existing network, according to Renoz Energy (updated 2 September 2026), and beyond that the applicant pays. The same guide reports community-posted costs from about A$20,000 for a short extension to A$100,000 or more near 1 km, which we could not verify against a network tariff. Ask your distributor for a written quote first.
After connection, a grid-connected home pays electricity bills, an off-grid home pays for fuel, maintenance and battery replacement. Our guide to grid-tied vs off-grid solar covers the trade-offs.
Rebates that apply to off-grid systems
Off-grid solar panels and batteries both earn small-scale technology certificates (STCs), which your installer deducts from the invoice. For the battery, the Clean Energy Regulator (updated 29 October 2026) states the rules in the table.
| Rule | What the Clean Energy Regulator says |
|---|---|
| Where | The battery must be on a lived-in dwelling; sheds and bore pumps do not qualify |
| How many | One battery per off-grid dwelling; a granny flat or caravan with its own solar can claim its own |
| More than 1 km from the grid | The battery does not need to be VPP capable |
| Less than 1 km from the grid | The battery must be VPP capable, or you provide written evidence that connecting would cost more than A$30,000 |
Source: Clean Energy Regulator, Solar batteries, https://cer.gov.au/schemes/renewable-energy-target/small-scale-renewable-energy-scheme/small-scale-renewable-energy-systems/solar-batteries, checked 14 November 2026.
For the amounts, the certificate factor is 6.8 per usable kWh for installations from 1 May to 31 December 2026, applied at 100% to 14 kWh, 60% from 14 to 28 kWh and 15% from 28 to 50 kWh, falling to 5.7 on 1 January 2027, as detailed in our large home battery price guide. At about A$39.85 per certificate (Demand Manager, October 2026), the working is below.
| System | Certificates | Approximate discount (at A$39.85) |
|---|---|---|
| 15 kWh battery | 99 (95.2 + 4.08, rounded down) | about A$3,945 |
| 30 kWh battery | 154 | about A$6,137 |
| 40 kWh battery | 164 | about A$6,535 |
| 10 kW solar, zone 3, installed 2026 | 69 (10 x 1.382 x 5 years) | about A$2,750 |
Solar Cobber calculation. The 10 kW solar figure uses the Clean Energy Regulator zone 3 rating of 1.382 and the 2026 deeming period of 5 years. Solar zones are by postcode, so Alice Springs (zone 1) earns more and Hobart (zone 4) less. Our STC explainer, federal battery rebate guide and state battery rebates guide cover the rest. State schemes often exclude properties without a grid connection, so check yours.
Is an off-grid system worth it? A worked example
Take a house far from the nearest pole, with a hypothetical connection quote of A$60,000 and a 25 kWh a day load. Under the Energy Matters ranges, a grid-connected solar and battery system costs A$12,000 to A$20,000, so the grid option is A$72,000 to A$80,000 plus bills. The off-grid option is A$40,000 to A$70,000 plus fuel and eventual battery replacement. Off-grid is the cheaper path, and the A$60,000 quote is above the A$20,000 to A$58,000 break-even gap.
If the quote were A$15,000, grid connection wins, with a total of A$27,000 to A$35,000 up front. The A$60,000 figure here is hypothetical, not a published quote.
What to check on your quote
An off-grid quote should itemise every block, state the design assumptions and name who services it.
- Daily load in kWh, how it was measured and how many days of autonomy the battery gives.
- Panel kW sized to winter output, not an annual average.
- Usable battery capacity, chemistry, warranty years and the cycle limit.
- Inverter-charger brand and surge rating, and whether it starts the generator automatically.
- Generator size, fuel type and purchase price, shown separately.
- Accreditation: check the installer on the Clean Energy Council and Solar Accreditation Australia registers yourself. We do not verify accreditation.
- Written STC treatment, including the 1 km and VPP rule.
Our guides to comparing solar quotes and the best off-grid solar installers help, and you can browse specialists in our installer directory.
FAQ
How much does an off-grid solar system cost in Australia?
A typical off-grid system costs A$15,000 to A$30,000 for a small cabin and A$40,000 to A$70,000 for an average home, as at November 2026. Large homes and farms start around A$70,000 and can exceed A$120,000. Prices vary with battery size, generator and site.
Is off-grid solar cheaper than connecting to the grid?
Only when the grid connection quote is large. A grid-connected solar and battery system costs about A$12,000 to A$20,000 against A$40,000 to A$70,000 off-grid for an average home, so a connection quote above roughly A$20,000 to A$58,000 tips the balance towards off-grid.
How much does an off-grid battery bank cost?
The battery is typically 40 to 50 per cent of the total cost. For a 30 to 40 kWh bank in an average home system that implies roughly A$16,000 to A$35,000, our calculation from the A$40,000 to A$70,000 range.
Can I get the battery rebate for an off-grid system?
Yes, for one battery per lived-in off-grid dwelling, according to the Clean Energy Regulator (29 October 2026). A property more than 1 km from the grid does not need a VPP capable battery. Within 1 km you need a VPP capable battery or written proof that connecting costs more than A$30,000.
How big a solar array do I need off-grid?
Size it for June output. For a 25 kWh a day home our calculation gives about 10 kW in Brisbane, 15 kW in Adelaide and 25 kW in Hobart on horizontal exposure. Tilted panels reduce those figures, and your installer should model your site.
Do off-grid systems need a generator?
Almost always. Most Australian off-grid designs include a backup generator for long overcast spells, according to the guides we read. Commodore Australia puts its annual running cost at around A$250, though that is a vendor figure.
How long does an off-grid battery last?
Lithium batteries listed by RACV Solar carry 10 year warranties. Commodore Australia says inverters and batteries may need replacement after 15 or more years. Budget for at least one battery replacement over the system’s life.
Sources
- Energy Matters, Off-Grid Solar System Cost Australia, 24 September 2026
- OffGrid WA package prices, checked 14 November 2026
- RACV Solar, residential off-grid solar systems
- Clean Energy Regulator, Solar batteries, updated 29 October 2026
- Clean Energy Regulator, STC calculation and zone ratings
- Bureau of Meteorology, climate averages: Perth Metro (009225)
- Solar Choice, solar panel prices November 2026
- Demand Manager, Certificate Report October 2026
- Renoz Energy, grid connection vs off-grid WA, 2 September 2026
- Commodore Australia, going off-grid costs
About this guide
By the Solar Cobber editorial team. Independent desk research checked in November 2026. Solar Cobber is a free directory that may earn referral or advertising fees from installers, but commercial relationships never affect content. This is general information, not financial advice. Corrections are welcome via /contact.
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