Gridly
NSW 2515 · Wollongong
Solar Panel Installation in Thirroul, NSW
Find a vetted solar installer in Thirroul. Compare quotes, check local solar data, and get a system designed for your roof.
Get Free Solar QuotesSolar Snapshot for Thirroul
Key data for sizing a solar system in Thirroul, NSW 2515.
4.3/day
Peak Sun Hours
8,287
Est. Annual Output (6.6 kW)
$1,284
Est. Annual Savings
4.2 yrs
Est. Payback (6.6 kW)
$2,808
STC Rebate (6.6 kW)
Zone 3
Dwelling Mix in Thirroul
Breakdown of dwelling types based on census data — relevant for understanding rooftop solar potential.
Houses
81%
3,367 dwellings
Townhouses
10%
417 dwellings
Apartments
8%
337 dwellings
Thirroul is predominantly freestanding houses, ideal for rooftop solar installation.
Solar Adoption in Thirroul 2515
Installation data from the Clean Energy Regulator, refreshed monthly.
2,098
Solar Systems Installed
Since 2001
6.3 kW
Avg System Size
13.1 MW
Total Installed Capacity
342
Battery Systems
Thirroul (2515) has 2,098 registered solar panel installations with a combined capacity of 13.1 MW. The average system size in this postcode is 6.3 kW.
Installations fell 17% in 2025 compared to 2024's 181 systems.
Is Solar Worth It in Thirroul?
Thirroul gets 4.3 peak sun hours per day — slightly below the national average. A 6.6 kW system here would produce roughly 8,287 kWh per year, saving an estimated $1,284 annually and paying itself off in 4.2 years.
At $5,392 after rebates, the upfront cost represents 4% of Thirroul's median household income ($125,736/year). A relatively small outlay for a 20+ year asset that generates returns from day one.
A 4.2-year payback is solid by Australian standards. After that, every kilowatt-hour your system generates is essentially free electricity for the remaining 15–20 years of the system’s life.
Why Install Solar in Thirroul?
Thirroul receives 4.3 peak sun hours daily. While this is lower than northern states, a well-sized system still generates significant savings. A 6.6 kW system can produce around 8,287 kWh per year, saving approximately $1,284 annually.
NSW households pay some of the highest electricity rates in Australia at around 35c/kWh, making solar an especially strong investment.
The median household income in Thirroul is $125,736 per year. At $5,392 after rebates, a 6.6 kW system represents 4% of annual household income, with savings that continue for 20+ years after the 4.2-year payback.
Estimated Solar Output & Payback in Thirroul
Based on 4.3 peak sun hours/day, 35c/kWh electricity, and STC Zone 3 rebate.
| System Size | Annual Output | Annual Savings | Cost After Rebate | Payback |
|---|---|---|---|---|
| 5 kW | 6,278 kWh | $973 | $4,355 $2,145 STC rebate | 4.5 yrs |
| 6.6 kW Most popular | 8,287 kWh | $1,284 | $5,392 $2,808 STC rebate | 4.2 yrs |
| 10 kW | 12,556 kWh | $1,946 | $7,210 $4,290 STC rebate | 3.7 yrs |
| 13 kW | 16,323 kWh | $2,530 | $8,923 $5,577 STC rebate | 3.5 yrs |
Estimates assume 80% system efficiency, 35% self-consumption rate, 5c/kWh feed-in tariff, and STC Zone 3 ($39/STC, 8-year deeming period). Actual results vary based on roof orientation, shading, and usage patterns.
Solar Rebates in New South Wales
Available incentives that reduce the cost of solar installation in NSW.
Small-scale Technology Certificates (STCs) provide an upfront discount worth $2,500 to $4,000 depending on system size and location.
NSW Peak Demand Reduction Scheme offers incentives for solar-battery systems that reduce evening grid load.
Popular Solar Panels
Top-rated panels available for installation in Thirroul.
Solahart Silhouette Series
455W, 22.8% efficiency
$165
Solahart SunCell Series
440W, 22% efficiency
$140
Canadian Solar TOPHiKu 6
440W, 22.5% efficiency
$130
Trina Solar Vertex S+
440W, 22% efficiency
$120
How Solar Installation Works
Site Assessment and Quote
An installer visits your property, assesses your roof, checks shading, and provides a detailed quote based on your energy usage.
System Design and Approval
Your system is designed to maximise output. Council approval may be needed for heritage properties, but most residential installs are exempt.
Installation
A residential solar installation typically takes one day. The team mounts panels, installs the inverter, and connects the wiring.
Grid Connection and Meter
Your installer lodges paperwork with your distributor. Once approved, your meter is upgraded to a bi-directional meter and you start exporting.
Frequently Asked Questions
How many peak sun hours does Thirroul get? ▼
Thirroul receives approximately 4.3 peak sun hours per day, based on its cool temperate climate zone. This means a standard 6.6 kW system can generate around 8,287 kWh annually.
What size solar system do I need in Thirroul? ▼
The right system size depends on your electricity usage. Average household consumption in New South Wales is 18 to 22 kWh per day. A 6.6 kW system suits most homes, while larger households or those with pools or EV chargers may benefit from a 10 kW or 13 kW system.
How much does solar installation cost in Thirroul? ▼
A 6.6 kW solar system in Thirroul costs approximately $8,200 before rebates. Thirroul is in STC Zone 3, which provides a rebate of $2,808 on a 6.6 kW system. After rebates, expect to pay around $5,392.
What is the payback period for solar in Thirroul? ▼
A 6.6 kW solar system in Thirroul has an estimated payback period of 4.2 years, based on 4.3 peak sun hours per day and annual savings of $1,284. After the payback period, the system continues generating free electricity for its remaining 20+ year lifespan.
Do I need council approval for solar in Thirroul? ▼
In most of NSW, residential solar installations are classified as exempt development and do not require council approval. Heritage-listed properties or conservation areas in Wollongong may have additional requirements. Your installer will advise during the site assessment.
How Thirroul Compares to Nearby Suburbs
Solar potential compared with neighbouring suburbs in the Wollongong area.
| Suburb | Sun Hours | 6.6 kW Output | Payback | Solar Adoption |
|---|---|---|---|---|
| Thirroul 2515 | 4.3h | 8,287 kWh | 4.2 yrs | — |
| Unanderra 2526 | 4.3h | 8,287 kWh | 4.2 yrs | — |
| Wollongong 2500 | 4.3h | 8,287 kWh | 4.2 yrs | — |
| Mount Ousley 2519 | 4.3h | 8,287 kWh | 4.2 yrs | — |
| Marengo 2453 | 4.9h | 9,443 kWh | 3.7 yrs | — |
All estimates assume a 6.6 kW system. Sun hours, output, and payback are based on the same methodology. Solar adoption shows CER-registered installations as a percentage of dwellings.
Nearby Suburbs
Solar installers in suburbs near Thirroul.
Related Products
Data sources: Clean Energy Regulator (installation counts), ABS 2021 Census (population and dwellings), Bureau of Meteorology (solar exposure). Solar output estimates assume north-facing panels with no shading. Electricity rates are state averages and may differ from your retailer's pricing. Get a personalised quote for accurate savings.