Solar & Battery Installation Cairns Local Installers & Quotes
ℹ️ Get quick estimates for solar and battery sizing, costs, and savings in Cairns using these simplified calculators. For more accurate, advanced calculations, use the full Photonik design platform.
Solar Design Cairns
Energy Usage
The right solar system size for your Cairns property depends on how much electricity you use each day. Whilst typical Cairns households consume 25 kWh daily, homes with good insulation and modern appliances often use far less energy.
Consider reducing your energy consumption first through better insulation and efficient appliances, as this can reduce the solar system size needed and improve your investment returns.
Typical energy usage per person per day in Cairns:
Note: Actual usage varies depending on property size, building efficiency, climate, and appliances.
Solar System Sizing
You'll need around 6.6kW of solar to match your average consumption. Systems sized between 9.9kW and 13.2kW perform best, accounting for natural fluctuations in solar production.
A 6.6 kW system in Cairns generates approximately 30.0 kWh daily on average, with seasonal variation from 4.08 kWh/kW/day in June to 4.90 kWh/kW/day in March.
Solar & Energy Savings
Calculate Heat Pump & EV Savings
Electrify your home by replacing gas heating, petrol vehicles, and other fossil fuel appliances with electric alternatives powered by clean solar energy. This delivers significant additional financial savings and substantial carbon emission reductions. Our calculator helps you compare costs and model the financial impact of switching to electric appliances and vehicles.
How Solar Reduces Your Electricity Bills
The calculations below show how your electricity bills change with solar. Your Old Bill of - per month (- annually) is calculated from your total energy consumption multiplied by the grid electricity rate. Your New Bill of - per month (- annually) accounts for solar generation, the percentage you use directly (self-consumption), remaining grid consumption, and feed-in credits for excess energy exported to the grid. This results in monthly savings of - (- annually).
Battery Storage Cairns
Solar Battery Sizing
A 6.6 kW solar-only setup in Cairns delivers around 50% self-sufficiency, leaving 50% dependent on grid electricity. Including a 10 kWh battery typically raises annual self-sufficiency to around 86%, with grid reliance dropping to 14%.
For accurate battery savings and ROI calculations, use the full Photonik design tool.
Energy Self Sufficiency Calculator*
*Note: This calculator provides simplified battery self-sufficiency estimates. For accurate per-hour simulations that account for solar generation patterns, consumption timing, battery charging/discharging cycles, and efficiency losses across all seasons, use the full Photonik design tool.
Panel Placement Tool Cairns
This is a simple panel placement tool that lets you quickly estimate panel count for a single roof area. Try Photonik for advanced features:
- Multiple panel groups
- Custom roof angles
- Panel orientation
- Shade loss calculations
- Panel selection (1000+ models)
- Full integration with our design tool
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Solar & Battery System Cost Cairns
Understanding Solar & Battery System Costs
Solar installation costs in Cairns start at approximately $7,661 for a 6.6 kW system, with a 10 kWh battery bringing the total to around $12,904. Solar-only systems typically pay for themselves in around 5.0 years, whilst adding battery storage usually extends payback whilst increasing energy independence.
The cost breakdown shows estimates for equipment costs, installation labour, and applicable taxes. Adjust system size and battery storage to see how it affects total investment and payback periods.
STC Rebates Cairns
STC rebates in Cairns are calculated based on your system size, location zone factor, and deeming period until 2031.
Use our full design tool for detailed system design, panel placement, and professional proposals.