Gridly
NSW 2760 · Penrith
Solar Panel Installation in St Marys East, NSW
Find a vetted solar installer in St Marys East. Compare quotes, check local solar data, and get a system designed for your roof.
Get Free Solar QuotesSolar Snapshot for St Marys East
Key data for sizing a solar system in St Marys East, NSW 2760.
4.5/day
Peak Sun Hours
8,672
Est. Annual Output (6.6 kW)
$1,344
Est. Annual Savings
4 yrs
Est. Payback (6.6 kW)
$2,808
STC Rebate (6.6 kW)
Zone 3
Dwelling Mix in St Marys East
Breakdown of dwelling types based on census data — relevant for understanding rooftop solar potential.
Houses
70%
8,735 dwellings
Townhouses
21%
2,620 dwellings
Apartments
9%
1,087 dwellings
St Marys East is predominantly freestanding houses, ideal for rooftop solar installation.
Solar Adoption in St Marys East 2760
Installation data from the Clean Energy Regulator, refreshed monthly.
4,409
Solar Systems Installed
Since 2001
7.5 kW
Avg System Size
32.9 MW
Total Installed Capacity
459
Battery Systems
St Marys East (2760) has 4,409 registered solar panel installations with a combined capacity of 32.9 MW. The average system size in this postcode is 7.5 kW.
Installations fell 20% in 2025 compared to 2024's 372 systems.
Is Solar Worth It in St Marys East?
St Marys East gets 4.5 peak sun hours per day — on par with the national average. A 6.6 kW system here would produce roughly 8,672 kWh per year, saving an estimated $1,344 annually and paying itself off in 4 years.
At $5,392 after rebates, the upfront cost represents 7% of St Marys East's median household income ($81,900/year). Most households finance this over 3–5 years, with loan repayments typically offset by immediate savings.
With a payback under 4 years and 20+ years of remaining system life, solar in St Marys East is one of the stronger return-on-investment cases in New South Wales. The question isn’t really whether solar is worth it here — it’s what size system to get.
Why Install Solar in St Marys East?
St Marys East receives 4.5 peak sun hours per day, which is solid for solar generation. A 6.6 kW system here can produce approximately 8,672 kWh annually, translating to estimated savings of $1,344 per year.
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 St Marys East is $81,900 per year. At $5,392 after rebates, a 6.6 kW system represents 7% of annual household income, with savings that continue for 20+ years after the 4-year payback.
Estimated Solar Output & Payback in St Marys East
Based on 4.5 peak sun hours/day, 35c/kWh electricity, and STC Zone 3 rebate.
| System Size | Annual Output | Annual Savings | Cost After Rebate | Payback |
|---|---|---|---|---|
| 5 kW | 6,570 kWh | $1,018 | $4,355 $2,145 STC rebate | 4.3 yrs |
| 6.6 kW Most popular | 8,672 kWh | $1,344 | $5,392 $2,808 STC rebate | 4 yrs |
| 10 kW | 13,140 kWh | $2,037 | $7,210 $4,290 STC rebate | 3.5 yrs |
| 13 kW | 17,082 kWh | $2,648 | $8,923 $5,577 STC rebate | 3.4 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 St Marys East.
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 St Marys East get? ▼
St Marys East receives approximately 4.5 peak sun hours per day, based on its warm temperate climate zone. This means a standard 6.6 kW system can generate around 8,672 kWh annually.
What size solar system do I need in St Marys East? ▼
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 St Marys East? ▼
A 6.6 kW solar system in St Marys East costs approximately $8,200 before rebates. St Marys East 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 St Marys East? ▼
A 6.6 kW solar system in St Marys East has an estimated payback period of 4 years, based on 4.5 peak sun hours per day and annual savings of $1,344. After the payback period, the system continues generating free electricity for its remaining 20+ year lifespan.
Do I need council approval for solar in St Marys East? ▼
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 Penrith may have additional requirements. Your installer will advise during the site assessment.
How St Marys East Compares to Nearby Suburbs
Solar potential compared with neighbouring suburbs in the Penrith area.
| Suburb | Sun Hours | 6.6 kW Output | Payback | Solar Adoption |
|---|---|---|---|---|
| St Marys East 2760 | 4.5h | 8,672 kWh | 4 yrs | — |
| Penrith 2750 | 4.5h | 8,672 kWh | 4 yrs | — |
| Claremont Meadows 2747 | 4.5h | 8,672 kWh | 4 yrs | — |
| Penrith Plaza 2750 | 4.5h | 8,672 kWh | 4 yrs | — |
| Cambridge Park 2747 | 4.5h | 8,672 kWh | 4 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 St Marys East.
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.