Solar installers Kirwan
Townsville's biggest suburb: 1970s to 1990s block homes with big roofs, cyclone-rated mounting and 8,836 systems already on.
- 30-year workmanship
- NETCC approved
- QLD #88205-licensed
- Postcode
- 4817
- Council
- Townsville City Council
- Network
- Ergon (regulated)
- From our Ormeau depot
- Partner crew, QVolt design
- Wind region
- Region C, cyclonic
- Sun-hours per day
- 5.7 avg
- STC zone
- Zone 2 (1.536)
What makes Kirwan different
Kirwan is Townsville's most populous suburb, on the western side of the city around the Willows and Thuringowa Central. It was built out from the 1970s to the 1990s. The homes are low-set concrete block with tile or tin roofs on flat 700 to 800 m2 blocks. Very little shade, big hipped roofs and strong dry-season sun make Kirwan a high-yield suburb. 8,836 homes in postcode 4817 have already installed.
- 8,836 rooftop systems in postcode 4817, the most of any Townsville postcode we serve
- 634 new systems in the year to July 2026, averaging 10.4 kW each
- 600 batteries installed across 4817 in the 12 months to July 2026
- Flat blocks and wide hipped roofs regularly fit 23 to 30 panels across two faces
- Ergon's regulated feed-in tariff of 13.4 cents/kWh makes every exported kWh worth more than in the south-east
What postcode 4817 has already put on its roofs
Every accredited solar and battery install in Australia is registered with the Clean Energy Regulator by postcode. These are the numbers for 4817, which covers Kirwan.
Source: Clean Energy Regulator, postcode data for small-scale installations, data as at 31/07/2026. Counts are for the whole postcode, and the last 12 months will still rise because installers have a year to register certificates.
Kirwan sunshine through the year
Twenty years of satellite-measured sunlight at the Kirwan centroid, turned into the kilowatt-hours a 6.6 kW system would produce each month.
- Best month
- Nov
- Lowest month
- Jun
- Winter low as a share of summer peak
- 55%
- Annual output, 6.6 kW
- 11,741 kWh
- Hottest month, average max
- 42°C
Source: NASA POWER, MERRA-2 / CERES SYN1deg climatology, 20-year Meteorological and Solar Monthly & Annual Climatologies (January 2001 - December 2020). Output assumes a north-facing array and an 85% performance ratio.
Solar savings estimate for Kirwan
Pre-loaded with Kirwan's own sun-hours, Ergon (regulated) tariffs and a typical local home. Slide the bill to match yours.
Preset for a typical Kirwan home: 1980s block home, ducted air, family of five. Adjust to match yours.
Kirwan households run air conditioning hard through the wet season, and pools are common. Daytime self-consumption of 40 percent plus exports at the regulated tariff make 10 kW the right size.
- Share of your bill covered
- 90%
- Indicative installed price
- $10,000
- Used at home / exported
- 7,111 / 10,666 kWh
- STC rebate (Zone 2)
- about 76 STCs, $2,964
Estimate only. Uses NASA POWER 20-year average sun-hours for Kirwan, Ergon (regulated) tariffs from the 2026 Default Market Offer, a 85% performance ratio and 2026 installed prices after the STC rebate. STC value assumes $39 per certificate and a 5-year deeming period. Your roof, shading and quote will change the numbers.
Open the full calculator with 4817 filled inCan you export solar in Kirwan?
Ergon (regulated) publishes how much solar each street transformer can still absorb. See the Kirwan snapshot and check your own address in about ten seconds.
What we find on Kirwan roofs
Kirwan homes have the classic Townsville block-wall construction with a hipped roof and a wide north or west plane, which suits 10 kW. Older tin roofs from the 1970s are quick to fit; the tile roofs need care as the tiles have weathered forty years of wet seasons. Everything is fixed for wind Region C with cyclone-rated clamps and closer rail spacing. Good airflow under the panels keeps them cooler on 35 degree days.
- Housing era
- 1970s to 1990s concrete block homes
- Roof material
- Concrete tile and corrugated tin
- Roof pitch
- Low to moderate, 15 to 22 degrees, hipped
- Typical block
- Flat, 700 to 800 m2
- Home type
- Low-set detached family homes
- Shading
- Low, some mature mango and poinciana trees
Panel counts at 440 W per panel, about 2 m² each. We confirm the real count from satellite imagery before quoting.
| System | Panels | Roof area |
|---|---|---|
| 6.6 kW | 15 | about 30 m² |
| 10 kW | 23 | about 46 m² |
| 13 kW | 30 | about 60 m² |
1980s block home, ducted air, family of five: 10 kW, self-consumption around 40%.
What applies to a Kirwan install
Council and network
Kirwan is straightforward from a planning point of view: no heritage overlays, and rooftop panels are accepted development under the Townsville City Plan. What matters is the engineering. Cyclone wind Region C sets the rail spacing and clamp count on every roof, and Ergon Energy's connection rules cap single-phase export at 5 kW on a standard connection. Regional Queensland's regulated feed-in tariff of 13.4 cents applies to whatever you export. Low-lying streets near the Bohle River and Louisa Creek fall within the flood overlay, which sets how high the inverter and battery are mounted.
STC rebate in Kirwan
Kirwan is in STC Zone 2 (rating 1.536). With a 5-year deeming period, a 6.6 kW system earns about 50 certificates, roughly $1,950 at $39 each, and a 10 kW system about 76, roughly $2,964. We claim it for you and take it off the quote.
Battery discount
The federal Cheaper Home Batteries Program cuts roughly 30 percent off the installed cost of a home battery, stepping down each year to 2030. Postcode 4817 added 600 batteries in the year to July 2026. We size the battery to your evening use, not the biggest unit on the truck.
Asked by Kirwan homeowners
Are my 1970s tiles too old for solar?
Usually not. Concrete tiles carry panels easily; the issue is brittleness after decades of wet seasons. We walk the roof carefully, replace any tiles that crack and photograph everything before and after.
How is the mounting different in a cyclone region?
The rails are spaced closer, there are more clamps per panel and the roof fixings are rated for Region C uplift under AS/NZS 1170.2. It is engineered for your specific roof, not a generic layout.
Is the Ergon feed-in tariff really better?
Yes. Regional Queensland's feed-in tariff is regulated by the Queensland Competition Authority and currently sits at 13.4 cents per kWh, compared with about 6 cents in south-east Queensland. It makes a larger system pay back faster in Kirwan.
Suburbs we cover near Kirwan
Kirwan installs are coordinated through QVolt's partner crew with our design, equipment selection and 30-year workmanship warranty.
30 year workmanship warranty
30 year panel warranty
10 year inverter warranty
10 year battery warranty
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