Solar & Battery Rebates in Queensland, Australia Incentives & Costs

Energy Usage

Energy consumption patterns in Queensland reflect the state's subtropical and tropical climate, with higher cooling needs during hot, humid summers. The average Queensland household uses between 20-30 kWh per day, with Brisbane and coastal properties typically consuming more during summer months for air conditioning. Energy-efficient properties throughout Queensland often use significantly less through modern insulation, efficient air conditioning systems, and smart home technologies.

Before installing solar, consider reducing your energy consumption through improved insulation and energy-efficient appliances. This is particularly valuable in Queensland, where high solar generation potential means reducing consumption can significantly lower the required system size and improve returns, especially given the state's generous feed-in tariffs.

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 in Queensland. We recommend sizing between 9.9kW and 13.2kW for optimal results, accounting for daily and seasonal variations. Queensland enjoys excellent solar potential, with Brisbane averaging around 4.5-5.0 kWh/kW/day annually, amongst the highest in Australia, with consistent generation throughout the year.

A 6.6 kW system in Queensland generates approximately 29.1 kWh daily on average, with seasonal variation from 3.72 kWh/kW/day in June to 4.87 kWh/kW/day in October. Queensland's exceptional solar irradiance, combined with generous feed-in tariffs (especially in regional areas) and competitive installation costs, makes solar particularly attractive for homeowners across the state.

With solar-only (no battery), a 6.6 kW system provides approximately 50% self-usage in Queensland, depending on your consumption patterns, drawing 50% from the grid. Adding a 10 kWh battery increases energy independence to approximately 86% annually, reducing grid reliance to 14%. Battery storage is valuable in Queensland, allowing you to store excess daytime generation for evening use and maximising the value of your solar investment, especially as feed-in tariffs vary by retailer.

Feed-in tariffs in Queensland are amongst the most generous in Australia, especially in regional areas, typically ranging from 8-12 cents per kWh. The federal Cheaper Home Batteries Program (from July 2025) provides around 30% discount on battery installations. Queensland's high solar adoption rate (50% of detached homes) reflects the state's excellent conditions for solar investment. For accurate battery savings and ROI calculations specific to your location and retailer, use the full Photonik design tool.

Understanding Solar & Battery System Costs

A 6.6 kW solar system in Queensland costs approximately $7,661, while adding a 10 kWh battery increases the total to around $12,904. Queensland benefits from competitive installation costs, with Brisbane and major cities offering excellent installer coverage and competitive pricing, thanks to high market competition. Solar-only systems typically pay for themselves in around 5.1 years in Queensland, whilst adding battery storage usually extends payback but significantly improves energy independence. The federal STC rebate reduces upfront costs by 25-30%, and Queensland's generous feed-in tariffs and excellent solar generation mean many systems achieve payback in under 4-5 years, amongst the fastest in Australia.

The cost breakdown shows estimates for equipment costs, installation labour, and GST. Adjust system size and battery storage to see how it affects total investment and payback periods. Queensland has excellent installer coverage, with Clean Energy Council (CEC) accredited installers operating throughout Brisbane, Gold Coast, Sunshine Coast, Townsville, Cairns, and regional areas, providing competitive pricing and quality installations.