A$5,500 - A$8,500
Installed price in Australia
4,250 kWh
Annual output
8-11 years
Payback period
5kW Solar System Cost in Australia
A 5kW solar panel system in Australia costs between A$5,500 - A$8,500 fully installed, including panels, inverter, mounting, and all electrical work. This price includes VAT and assumes a standard roof installation.
With annual savings of A$800-A$1,250 on electricity bills and additional export income of A$50-A$130 through Solar Rebates (STCs), a 5kW system typically pays for itself in 8-11 years. After payback, you benefit from effectively free electricity for the remaining 15+ years of panel life.
5kW System Specifications
| System Size | 5kW |
| Number of Panels | 12-14 |
| Roof Area Required | 25-30 m² |
| Annual Generation | 4,250 kWh |
| Price Range (AUD) | A$5,500 - A$8,500 |
| Annual Savings | A$800-A$1,250 |
| Export Income | A$50-A$130/year |
| Payback Period | 8-11 years |
| CO2 Savings | 1.3-1.6 tonnes/year |
| Best For | 3-4 bedroom house |
* Prices include installation. Actual costs vary by location, roof type, and installer. Get CEC-certified quotes for an accurate price.
Is a 5kW Solar System Right for You?
A 5kW system is the sweet spot for growing families and households with above-average electricity consumption. With 4,250 kWh of annual generation, it provides meaningful surplus for EV charging, battery storage, or export income.
Ideal for
- 3-4 bedroom family homes
- Households using 4,000-5,000 kWh per year
- Homes with or planning an electric vehicle
- Families wanting to future-proof their energy supply
- Properties with heat pumps or high hot water usage
EV-Ready Solar
One of the key advantages of a 5kW system is its ability to contribute meaningfully to electric vehicle charging. On sunny days, the surplus generation can add 30-50 miles of EV range. Paired with a 6-8kWh battery, you can charge overnight using stored solar energy rather than expensive grid electricity.
Cost vs Value
At A$5,500 - A$8,500, a 5kW system costs roughly 15-20% more than a 4kW system but generates about 25% more electricity. This makes it excellent value per kWh, especially for households that can use most of the energy produced. With savings of A$800-A$1,250 per year plus A$50-A$130 in export income, payback is typically 8-11 years.
Ensure your installer is CEC-certified to qualify for Solar Rebates (STCs) and meet all Australian safety standards.
Battery Pairing for 5kW Systems
A 6-8kWh battery is the ideal pairing for a 5kW system. This allows you to store surplus daytime generation for evening use, increasing self-consumption from around 40-50% to 70-80%.
Recommended Size
6-8kWh
Self-Consumption With Battery
70-80%
Self-Consumption Without
40-50%
Read our complete battery storage guide for brand comparisons, costs, and installation details.
Compare 5kW with Other Sizes
3kW
A$3,500 - A$5,500
2,550 kWh/year
1-2 bedroom flat or house
4kW
A$4,500 - A$7,000
3,400 kWh/year
2-3 bedroom house
6kW
A$6,500 - A$10,000
5,100 kWh/year
4+ bedroom house
8kW
A$8,000 - A$13,000
6,800 kWh/year
Large property or small commercial
10kW
A$10,000 - A$16,000
8,500 kWh/year
Very large home or commercial property
5kW Solar System FAQs
Is a 5kW solar system good for a family home?
Can a 5kW system charge an electric vehicle?
What battery size pairs best with a 5kW system?
How does a 5kW system compare to a 4kW in Australia?
Get Free 5kW Solar Quotes
Compare prices from CEC-certified installers in Australia. Free, no-obligation quotes tailored to your home.