Gridly
WA 6968 · Cockburn
Solar Panel Installation in Spearwood, WA
Find a vetted solar installer in Spearwood. Compare quotes, check local solar data, and get a system designed for your roof.
Get Free Solar QuotesSolar Snapshot for Spearwood
Key data for sizing a solar system in Spearwood, WA 6968.
5/day
Peak Sun Hours
9,636
Est. Annual Output (6.6 kW)
$1,359
Est. Annual Savings
4 yrs
Est. Payback (6.6 kW)
$2,808
STC Rebate (6.6 kW)
Zone 3
Dwelling Mix in Spearwood
Breakdown of dwelling types based on census data — relevant for understanding rooftop solar potential.
Houses
0%
0 dwellings
Townhouses
0%
0 dwellings
Apartments
0%
0 dwellings
Spearwood is predominantly freestanding houses, ideal for rooftop solar installation.
Solar Adoption in Spearwood 6968
Installation data from the Clean Energy Regulator, current to May 2026.
7
Solar Systems Installed
Since 2001
2.8 kW
Avg System Size
0.0 MW
Total Installed Capacity
Spearwood (6968) has 7 registered solar panel installations with a combined capacity of 0.0 MW. The average system size in this postcode is 2.8 kW.
Is Solar Worth It in Spearwood?
Spearwood gets 5 peak sun hours per day — above the national average. A 6.6 kW system here would produce roughly 9,636 kWh per year, saving an estimated $1,359 annually and paying itself off in 4 years.
With a payback under 4 years and 20+ years of remaining system life, solar in Spearwood is one of the stronger return-on-investment cases in Western Australia. The question isn’t really whether solar is worth it here — it’s what size system to get.
Why Install Solar in Spearwood?
With 5 peak sun hours per day, Spearwood receives above-average solar irradiance for Australia. A standard 6.6 kW rooftop system here can generate approximately 9,636 kWh per year, saving an estimated $1,359 annually on electricity bills.
Western Australia's solar-friendly climate combined with electricity rates around 31c/kWh makes solar a strong choice for WA households.
Estimated Solar Output & Payback in Spearwood
Based on 5 peak sun hours/day, 31c/kWh electricity, and STC Zone 3 rebate.
| System Size | Annual Output | Annual Savings | Cost After Rebate | Payback |
|---|---|---|---|---|
| 5 kW | 7,300 kWh | $1,029 | $4,355 $2,145 STC rebate | 4.2 yrs |
| 6.6 kW Most popular | 9,636 kWh | $1,359 | $5,392 $2,808 STC rebate | 4 yrs |
| 10 kW | 14,600 kWh | $2,059 | $7,210 $4,290 STC rebate | 3.5 yrs |
| 13 kW | 18,980 kWh | $2,676 | $8,923 $5,577 STC rebate | 3.3 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 Western Australia
Available incentives that reduce the cost of solar installation in WA.
STCs provide an upfront discount of $2,500 to $4,000 depending on system size.
Synergy and Horizon Power offer time-of-use tariffs that improve solar self-consumption economics.
Popular Solar Panels
Top-rated panels available for installation in Spearwood.
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 Spearwood get? ▼
Spearwood receives approximately 5 peak sun hours per day, based on its warm temperate climate zone. This means a standard 6.6 kW system can generate around 9,636 kWh annually.
What size solar system do I need in Spearwood? ▼
The right system size depends on your electricity usage. Average household consumption in Western Australia is 17 to 21 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 Spearwood? ▼
A 6.6 kW solar system in Spearwood costs approximately $8,200 before rebates. Spearwood 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 Spearwood? ▼
A 6.6 kW solar system in Spearwood has an estimated payback period of 4 years, based on 5 peak sun hours per day and annual savings of $1,359. After the payback period, the system continues generating free electricity for its remaining 20+ year lifespan.
Do I need council approval for solar in Spearwood? ▼
In Western Australia, most residential solar installations are considered exempt development. Heritage-listed properties or certain zones in Cockburn may require approval. Your installer will confirm during the site assessment.
Nearby Suburbs
Solar installers in suburbs near Spearwood.
Related Products
Solar output estimates use Bureau of Meteorology irradiance data and assume north-facing panels with no shading. Population and dwelling data: ABS 2021 Census. Electricity rates are state averages and may differ from your retailer's pricing. Get a personalised quote for accurate savings.