Solar Power Calculator Australia
Get accurate estimates for your solar investment with our advanced calculator. Includes current Australian rebate assumptions, realistic performance data, and 20-year projections.
Solar Calculator
Enter your details to get personalized solar estimates
Roof Details
Common sizes: 6.6kW (standard), 10kW (large home), 13.2kW (very large). Use slider for custom sizes.
Average Australian rates: $0.25-$0.35/kWh. Check your electricity bill for your exact rate.
What you earn for excess solar sent to the grid. Typical range: $0.05-$0.15/kWh. Premium plans may offer up to $0.20/kWh.
Select Your Location
Choose your city to see personalized solar estimates
How Our Solar Calculator Works
Solar Generation Estimates
We use Bureau of Meteorology solar irradiance data for 20+ Australian cities to calculate how much electricity your panels will generate based on your location, roof orientation, and shading.
Current Market Pricing
System costs reflect current Australian market assumptions including installation. Solar STCs are treated as usually already included in installer prices, with battery support shown separately.
20-Year Financial Projections
Our long-term projections account for 2.5% annual electricity price increases and 0.5% panel degradation per year, giving you a realistic view of lifetime savings.
Environmental Impact
See your potential CO2 reduction using a conservative national planning factor. Actual avoided emissions vary by state, season, and time of day.
Australian Solar Rebates in 2026
Federal STC Rebate
The Small-scale Technology Certificate (STC) scheme provides upfront discounts on solar systems nationwide. The rebate varies by location and system size.
Typically $2,000-$4,500 for residential systems
State Programs
Some states and local programs offer additional rebates, loans, or battery incentives. Eligibility changes often, so confirm current program rules before signing.
Check state and local eligibility
Battery Rebates
The federal Cheaper Home Battery Program provides STC-based support for eligible batteries. From May 2026, support tapers above 14 kWh of usable capacity.
STC-based discount for eligible systems
Why Use Our Calculator?
Our calculator uses real Australian data to provide accurate, personalized estimates for your solar investment
Accurate Cost Estimates
Get realistic pricing based on current Australian market rates and government rebates.
Long-term Projections
See 20-year savings projections accounting for electricity price increases.
Personalized Results
Calculations tailored to your location, roof, and household characteristics.
Energy Independence
Understand how much of your electricity needs solar can meet.
Risk Assessment
Payback period analysis helps you understand investment quality.
Environmental Impact
See your potential carbon footprint reduction with solar energy.
Calculator FAQ
Common questions about our solar savings calculator
Last reviewed May 2026
Calculator results are estimates based on published scheme settings and typical market assumptions. Confirm your exact STC value, tariff, and state eligibility before accepting a quote.