Solar System Size in Melbourne (2026)
Melbourne's lower winter sun pushes households toward a larger system to cover cold-season load.
Your solar system size details
We estimate system size from typical household consumption per bill bracket.
Your estimate sits within the typical range.
Where the money goes
Estimated breakdown for your configuration
💰 Ways to save
- Size to your actual usage, oversizing wastes money, undersizing leaves savings on the table.
- Make sure the federal STC rebate is shown as an upfront discount in the quote.
or from $31/week over 5 years , indicative finance
How we estimate this
Solar in Australia in 2026 typically costs $900–$1,300 per kW installed after the federal rebate, so a 6.6kW system runs roughly $5,000–$8,000 and a 10kW system $9,000–$13,000.
Pricing reviewed: June 2026.
What a solar system size costs in Melbourne
Melbourne gets fewer peak-sun hours than the northern capitals, with overcast, cold winters cutting generation when reverse-cycle heating demand peaks, so households here often size a system larger than a Brisbane home with the same bill would, to capture enough through the shoulder seasons and offset winter use. The brick-veneer and period housing usually offers workable roof area, though heritage-overlay terraces and shaded inner-suburb blocks can limit the array.
The right size leans on when you use power: a daytime-heavy household captures more of a big summer yield, while an evening-peak home gains from a battery or a system sized to shift load. Melbourne's deep installer market makes a larger array competitively priced. In a climate whose winter sun is modest, erring toward a bigger system, roof space permitting, is usually the sounder call than under-sizing and buying back expensive grid power.
Compare against the national picture: Solar System Size in Australia →
Solar System Size in other cities
Frequently asked questions
What size solar system do I need?
It depends on your consumption. As a guide, a ~$500 quarterly bill suits a 6.6kW system; a $1,000+ bill may need 13kW. The calculator estimates this from your bill.
How much does solar cost in Australia?
About $900–$1,300 per kW installed after rebate in 2026, roughly $5,000–$8,000 for 6.6kW and $9,000–$13,000 for 10kW.
Is a solar battery worth it?
Batteries increase self-sufficiency and backup but roughly double the project cost. Payback depends on your usage pattern and any battery rebates.