Solar Power Calculator Australia
Get accurate estimates for your solar investment with our advanced calculator. Includes 2025 Australian rebates, 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 2025 Australian market rates including installation. We include all available government rebates including federal STCs and state-specific programs.
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 based on Australia's grid emission factor of 0.82 kg CO2 per kWh. Understand the environmental benefits of switching to solar energy.
Australian Solar Rebates in 2025
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
Victoria, South Australia, and other states offer additional rebates and interest-free loans for solar and battery installations.
Up to $1,400 additional in VIC
Battery Rebates
The new federal Cheaper Home Battery Program provides approximately $372 per kWh for battery storage systems from July 2025.
Up to $18,600 for 50kWh batteries
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