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Solar panels in Perth

Perth has more sunshine than any other Australian capital and some of the country's highest rooftop solar uptake to show for it. Long, dry, hot summers drive the air conditioning bills, and the sea breeze that arrives most afternoons keeps panel temperatures, and output, a little higher than the inland numbers would suggest. The Clean Energy Regulator's postcode data on this page covers the metropolitan area from Two Rocks in the north to Rockingham in the south and out to the hills.

Clean Energy Regulator small-scale installation data across 127 postcodes in Greater Perth, to October 2026. Averages include some business systems.

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Where the installs are going

The growth corridors are where the volume is: Alkimos, Yanchep and Butler in the north, Baldivis, Byford and Piara Waters in the south and south east, and Ellenbrook to the north east. These are estates of single-storey homes on big blocks with tile or Colorbond roofs and, increasingly, three-phase supply. The established suburbs install steadily as their sixties and seventies roofs are replaced.

Roofs and homes in Perth

Perth is a tile city. Clay and concrete tiles cover most roofs outside the newest estates, and they take panels well provided the tile-hook work is done carefully and cracked tiles are replaced as they are found. Salt is a factor anywhere near the coast, which in Perth is a long strip of suburbs, so coastal-rated hardware is worth specifying from Fremantle up to Two Rocks. Shade is rarely the problem it is in the eastern capitals; heat is, and an inverter placed out of the afternoon sun keeps its output and its life.

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 nearly every household, so the feed-in tariff is set by the state under the Distributed Energy Buyback Scheme, which pays much more for exports in the late afternoon and evening than in the middle of the day. That changes the design: a west-facing array is worth considering, and a battery that shifts solar into the paid window does real work. Single-phase homes have an export limit, larger systems need Western Power's approval, and the WA Residential Battery Scheme stacks with the federal rebate.

Suburban street with power poles and overhead lines at sunset

What a system generates in Perth

Perth averages 5.3 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 Perth
SystemAverage dayYear
6.6 kW29.7 kWh10,853 kWh
10 kW45.1 kWh16,443 kWh

Worked as system size times 5.3 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. 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 Perth

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 Perth

These are the installed prices our solar panel cost guide works on, with the federal STC rebate for Perth 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
    $5,000 to $6,500
    STC rebate, Zone 3
    $1,710
    You pay after the STC
    $3,290 to $4,790

  • 10 kW

    Installed price
    $7,200 to $9,500
    STC rebate, Zone 3
    $2,622
    You pay after the STC
    $4,578 to $6,878

  • 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

The 6.6 kW and 10 kW prices are the Perth figures from our solar panel cost guide; the 5 kW and 13 kW prices are its national ranges. 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 Perth in the 12 months to October 2026 was 9.3 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 Perth

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
    10,853 kWh
    Yearly saving
    $1,237
    You pay after the STC
    $3,290 to $4,790
    Simple payback
    2.7 to 3.9 years

  • 10 kW

    Yearly generation
    16,443 kWh
    Yearly saving
    $1,875
    You pay after the STC
    $4,578 to $6,878
    Simple payback
    2.4 to 3.7 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 $1,845 a year in Perth and pays back in 1.8 to 2.6 years.

Your rebate in Perth

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 Perth

The federal Cheaper Home Batteries rebate applies in Perth 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 Perth 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 Perth

Our guide to the best solar installers in Perth looks at 5 companies that install across Greater Perth: Regen Power, Solargain, PSW Energy, Perth Solar Force and Solahart (Perth dealers). It compares accreditation, customer reviews, warranty terms, years in business and pricing.

Best solar installers in Perth

The guide is editorial: a company appearing in it is not the same as holding Why Solar approval.

When you check your rebate with us, you are matched with one Why Solar Approved installer in Perth. 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

Perth is 127 postcodes. Check yours, or any other.

What Perth homeowners ask us

Perth homeowners ask about the WA battery scheme first, because with the federal rebate on top it has made storage realistic for the first time, and about how to face the panels under the buyback scheme's time-of-day rates. They ask whether an older system can take a battery, which usually depends on the inverter. And they ask about door-to-door sales, which Perth gets more of than most cities. No installer in our network sells at the door, and none will call you until you choose a time.

Questions people ask

How many homes in Perth installed solar in the last 12 months?
26,832 small-scale solar systems were installed across Perth's 127 postcodes in the 12 months to October 2026, averaging 9.3 kW. The figures are the Clean Energy Regulator's postcode data, not estimates.
What solar rebates apply in Perth?
Up to $8,000+ in solar and battery rebates apply in Perth, 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 Perth?
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 Perth?
A 6.6 kW system in Perth costs about $5,000 to $6,500 installed. The federal STC rebate in Zone 3 takes $1,710 off, so you pay about $3,290 to $4,790. A 10 kW system is $7,200 to $9,500 before the rebate and $4,578 to $6,878 after it. Prices move with the panels, the inverter, the roof and any switchboard work.
Is it worth getting solar in Perth?
For most owner-occupiers with a roof that gets sun, yes. A 6.6 kW system in Perth makes about 10,853 kWh a year from 5.3 peak sun hours a day. Using 30% of that at home and exporting the rest saves about $1,237 a year at today's rates, which pays back the after-rebate price in 2.7 to 3.9 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 Perth?
There is no single best installer for every home. Our guide to the best solar installers in Perth compares 5 companies, including Regen Power, Solargain and PSW Energy, on accreditation, reviews, warranty terms and years trading. Whoever you choose, check the SAA accreditation, the workmanship warranty and how long the company has traded under its current ABN. If you check your rebate with us, you are matched with one Why Solar Approved installer 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 Perth figures

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Best solar installers in Perth

Your rebate, one Why Solar Approved installer in Perth, 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