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Solar panels in Bunbury

Bunbury is the capital of the South West, two hours below Perth, with a Mediterranean climate of hot dry summers and mild wet winters that suits solar very well. The Clean Energy Regulator's postcode data on this page covers Bunbury and its suburbs from South Bunbury and Carey Park out to Glen Iris and College Grove, the coastal estates at Dalyellup, and the fast-growing towns of Eaton, Millbridge and Australind across the estuary.

Clean Energy Regulator small-scale installation data across 3 postcodes in the South West, to October 2026. Averages include some business systems.

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Where the installs are going

Australind and Eaton are where the growth has been, with Dalyellup close behind. These are new estates of large single-storey homes on Colorbond roofs, and they have installed solar at a rate the older parts of the city cannot match. Bunbury itself has a mix of older brick homes and post-war weatherboard, plus the heritage streets near the CBD.

Roofs and homes in Bunbury

Salt and wind are the local factors. The sea breeze that makes summer bearable also carries salt well inland, so coastal-rated mounting hardware and stainless fasteners are the right specification for most of the region, not just the beachfront. The South West gets strong winter storms off the Indian Ocean, and roofs on exposed sites at Dalyellup and Binningup should have properly engineered mounting. Tile roofs on the older homes need careful tile-hook work; Colorbond in the estates is straightforward. A roof that is due for new sheeting should get it before the array goes on, not after.

Brick house with solar panels on its roof, on a suburban street

The network: Western Power

Western Power runs the network, and Synergy is the retailer for most households, which makes WA different from the eastern states: the feed-in tariff is set by government under the Distributed Energy Buyback Scheme and pays much more for exports in the late afternoon and evening than during the day. That pushes Bunbury households towards west-facing arrays and towards batteries, which can shift solar into the higher-paying window. Single-phase export limits apply, and larger systems need Western Power's approval.

Suburban street with power poles and overhead lines at sunset

What a system generates in Bunbury

Bunbury averages 5 peak sun hours a day and sits in STC Zone 3. A peak sun hour is an hour of sunlight at full strength, so the figure is what a panel collects once the weaker morning and evening light is added up. On that average, this is what the two most common system sizes produce on a north-facing roof with no shade.

Average daily and yearly solar generation in Bunbury
SystemAverage dayYear
6.6 kW28.1 kWh10,238 kWh
10 kW42.5 kWh15,513 kWh

Worked as system size times 5 peak sun hours times 85%, the allowance our suburb pages make for inverter, heat and wiring losses, over 365 average days. Summer days produce well above the average and winter days well below it, and an east or west-facing array produces less than a north-facing one.

Across the eight capitals, the same 6.6 kW system makes from about 7,576 kWh a year in Hobart to about 11,262 kWh in Darwin. In Bunbury it makes about 6% less than it would in Perth. More sun means more output from the same panels, but it does not change the STC rebate within a zone: that is set by the zone, the system size and the year you install.

Rebates and feed-in tariffs in Bunbury

Federal
Up to $8,000+ in solar and battery rebates in STC Zone 3. See how we calculate this.
Western Australia
up to $1,300 (Synergy) or $3,800 (Horizon Power) from the WA Residential Battery Scheme, stackable with the federal rebate.
Feed-in tariff
Rates in Western Australia are set by the state under the Distributed Energy Buyback Scheme. Compare WA feed-in tariffs.

How much solar panels cost in Bunbury

These are the installed prices our solar panel cost guide works on, with the federal STC rebate for Bunbury taken off. The rebate comes off the quote at the point of sale, so the last column is what you actually pay. In STC Zone 3 it is worth $1,710 on a 6.6 kW system and $2,622 on a 10 kW one.

  • 5 kW

    Installed price
    $4,500 to $6,500
    STC rebate, Zone 3
    $1,292
    You pay after the STC
    $3,208 to $5,208

  • 6.6 kW

    Installed price
    $5,500 to $8,000
    STC rebate, Zone 3
    $1,710
    You pay after the STC
    $3,790 to $6,290

  • 10 kW

    Installed price
    $8,000 to $12,000
    STC rebate, Zone 3
    $2,622
    You pay after the STC
    $5,378 to $9,378

  • 13 kW

    Installed price
    $10,000 to $15,000
    STC rebate, Zone 3
    $3,382
    You pay after the STC
    $6,618 to $11,618

Prices are the national ranges from our solar panel cost guide. Installed prices are before any rebate. The STC rebate is the certificates each system creates in Zone 3 over the 2026 deeming period of 5 years, at $38 a certificate. The deeming period shortens by a year every 1 January, so the same system earns less rebate each year you wait.

The average system installed across Bunbury in the 12 months to October 2026 was 9.1 kW, between the 6.6 kW and 10 kW rows, although that average includes some business systems. Size yours on your own bills and roof, but it is a fair check on what your neighbours are putting up.

What moves a quote up or down: the panel and inverter brands, a second storey or a steep or tiled roof, and switchboard or meter work. The full breakdown is in our solar panel cost guide.

Payback in Bunbury

Payback is the after-rebate price divided by what the system saves each year. The saving comes from two places: the power you use yourself, which you no longer buy at around 31.0c per kWh, and the power you export, which earns the feed-in tariff.

  • 6.6 kW

    Yearly generation
    10,238 kWh
    Yearly saving
    $1,167
    You pay after the STC
    $3,790 to $6,290
    Simple payback
    3.2 to 5.4 years

  • 10 kW

    Yearly generation
    15,513 kWh
    Yearly saving
    $1,768
    You pay after the STC
    $5,378 to $9,378
    Simple payback
    3 to 5.3 years

Assumes 30% of the solar is used in the home at 31.0c per kWh, the average residential usage rate we hold for Western Australia, and the other 70% is exported at 3.0c per kWh, the median feed-in tariff we hold for Western Australia. That 30% is the share our suburb pages and calculators assume for a household out at work during the day. No battery, no price rises and no panel ageing are counted.

Using more of it yourself improves the numbers quickly, because a kWh used at home is worth 31.0c and an exported one 3.0c. At 50% self-consumption, which a household home through the day or one that runs the pool pump, dishwasher and hot water on a timer can reach, the 6.6 kW system saves about $1,740 a year in Bunbury and pays back in 2.2 to 3.6 years.

Your rebate in Bunbury

Up to $8,000+ in solar and battery rebates. One Why Solar Approved installer, one free written quote, and fifteen minutes with a solar expert before you sign.

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Batteries in Bunbury

The federal Cheaper Home Batteries rebate applies in Bunbury as it does everywhere. It is paid on usable capacity, at $258/kWh for the first 14 kWh and at lower rates above that, and like the STC rebate it comes off the price at the point of sale. It steps down on 1 January 2027, when the full rate falls to $217/kWh.

  • 10 kWh

    Federal rebate
    $2,584
    WA Residential Battery Scheme (Synergy)
    $1,300
    Total rebate
    $3,884

  • 14 kWh

    Federal rebate
    $3,610
    WA Residential Battery Scheme (Synergy)
    $1,300
    Total rebate
    $4,910

The state figure is paid at $130 per kWh up to 10 kWh, so it does not grow with a bigger battery. Conditions: Synergy customers only, which is Perth and the South West Interconnected System. Virtual Power Plant participation is mandatory.

Western Australia: up to $1,300 (Synergy) or $3,800 (Horizon Power) from the WA Residential Battery Scheme, stackable with the federal rebate.

Whether a battery pays in Bunbury comes down to the gap between what you pay for power and what you are paid for exporting it. Each kWh a battery moves from export into your evening is worth about 28.0c (31.0c less 3.0c). A 10 kWh battery that filled and emptied every day would be worth up to $1,022 a year on that gap alone; most do less in winter, when there is less surplus to store.

Battery prices by size, before and after the federal rebate, are in our battery cost guide, and the WA battery rebate page has the state detail.

Installers in Bunbury

We have not published an installer guide for Bunbury yet. Our national installer directory lists SAA-accredited installers with customer reviews.

When you check your rebate with us, you are matched with one Why Solar Approved installer in Bunbury. An installer has passed all six of our checks: credentials, staying power, proof of work, who actually turns up to do the job, what goes in, and how they handle trouble. They earn it before they see a single homeowner, and they lose it if they let one down. The installer never cold-calls you; the one call is from a solar expert, fifteen minutes before you sign.

Installer in hi-vis and a safety harness fitting solar panels to a tin roof

What's actually happening on roofs near you

Bunbury is 3 postcodes. Check yours, or any other.

What Bunbury homeowners ask us

Bunbury homeowners ask about the WA battery scheme, which stacks with the federal rebate and has been a genuine reason to add storage here, and about the buyback scheme's time-of-day rates, which change the answer to how a system should face. They also ask about installers from Perth versus local ones. Either can be fine, but a company that services the South West every week will be there when a fault develops in winter, and that matters more than the last few hundred dollars on the quote. One more thing worth asking is whether the quote includes the Western Power connection application and the meter change, because a surprising number of South West quotes leave one of them out and add it later.

Questions people ask

How many homes in Bunbury installed solar in the last 12 months?
811 small-scale solar systems were installed across Bunbury's 3 postcodes in the 12 months to October 2026, averaging 9.1 kW. The figures are the Clean Energy Regulator's postcode data, not estimates.
What solar rebates apply in Bunbury?
Up to $8,000+ in solar and battery rebates apply in Bunbury, calculated from STC Zone 3 and the federal battery rebate. Western Australia: up to $1,300 (Synergy) or $3,800 (Horizon Power) from the WA Residential Battery Scheme, stackable with the federal rebate.
What is the best feed-in tariff in Bunbury?
Feed-in tariffs in Western Australia are set by the state under the Distributed Energy Buyback Scheme, so compare plans once your system is in.
How much does it cost to install solar panels in Bunbury?
A 6.6 kW system in Bunbury costs about $5,500 to $8,000 installed. The federal STC rebate in Zone 3 takes $1,710 off, so you pay about $3,790 to $6,290. A 10 kW system is $8,000 to $12,000 before the rebate and $5,378 to $9,378 after it. Prices move with the panels, the inverter, the roof and any switchboard work.
Is it worth getting solar in Bunbury?
For most owner-occupiers with a roof that gets sun, yes. A 6.6 kW system in Bunbury makes about 10,238 kWh a year from 5 peak sun hours a day. Using 30% of that at home and exporting the rest saves about $1,167 a year at today's rates, which pays back the after-rebate price in 3.2 to 5.4 years. It pays back faster if you use more of the power during the day, and more slowly on a shaded roof or a small bill.
Who is the best solar installer in Bunbury?
There is no single best installer for every home. Look for SAA accreditation, a written workmanship warranty and a company that has traded under the same ABN for years; our national installer directory lists accredited installers with reviews. If you check your rebate with us, you are matched with one Why Solar Approved installer in Bunbury who has passed all six of our checks.
What is the 20% rule for solar?
It is the rule of thumb that the panels should be rated 20 to 33 per cent above the inverter, such as 6.6 kW of panels on a 5 kW inverter. Panels rarely produce their full rating, so a slightly larger array keeps the inverter working near its capacity for more of the day. The Clean Energy Council's design guidelines, which the STC rules follow, allow panels up to a third larger than the inverter. That is why 6.6 kW is the standard size on a 5 kW inverter, and why 13.3 kW is the largest array on a 10 kW single-phase inverter.

Suburbs in the Bunbury figures

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Your rebate, one Why Solar Approved installer in Bunbury, and a solar expert on the phone before you sign.

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Up to $8,000+ in solar and battery rebates · Federal rebates step down in 80 daysSee how we calculate this