The average cost of a 6.6kW solar system in Brisbane

When seeking a solar panel installation quote, the most common system size for Brisbane homes is 6.6kW. This is because it’s large enough to cover the energy needs of a typical family and maximises the federal government rebate without being excessive. In 2025, the price for a fully installed 6.6kW system in Brisbane generally falls between $5,000 and $9,000.

This price range is influenced by three main factors:

• Quality of Components: Premium panels and inverters cost more upfront but often deliver better performance and longer warranties.

• Installer Experience: Highly reputable installers may have higher labour costs but provide superior workmanship and after-sales support.

• Installation Complexity: Factors like roof type (tile vs. tin), height, and accessibility can affect the final cost.

Here is a breakdown of what you can expect from a quote in different price brackets:

Solar panel rebates and incentives in Brisbane for 2025

The most significant financial incentive available for a new solar panel installation in Brisbane is the federal government’s Small-scale Renewable Energy Scheme (SRES). This isn’t a direct cash rebate but an upfront discount on your system’s cost.

Here’s how it works:

• The scheme provides a number of Small-scale Technology Certificates (STCs) based on your system’s size and location.

• Brisbane is in a high sun exposure zone, which means you receive a favourable number of STCs.

• Your solar installer will claim these certificates on your behalf and apply their value as a discount on your final quote. For a 6.6kW system, this discount is typically between $2,000 and $2,500.

It’s important to note that the value of STCs is gradually decreasing each year until the scheme is phased out in 2030. Therefore, the incentive received in 2025 is slightly less than in previous years, encouraging earlier adoption.

While some state-specific battery rebates have been available in Queensland previously, the primary incentive for a new solar panel system remains the federal SRES.

How to find the best solar installers in Brisbane

Choosing the right installer is just as important as selecting the right panels. A quality installation ensures safety, performance, and longevity. When reviewing Brisbane solar panel installation companies, look for these key indicators of quality: AU Solar Panels’s Pro Tip:Ask potential installers for a copy of their public liability insurance certificate. A reputable company will provide this readily. This ensures you are protected in the unlikely event of property damage during the installation.

• SAA Accreditation: The installer must be accredited by Solar Accreditation Australia (SAA). This is the new industry standard, replacing the previous CEC accreditation, and is a non-negotiable requirement for a compliant and safe installation.

• In-House Installers: Companies that use their own dedicated installation teams often have better quality control and accountability than those who subcontract the work.

• Positive Customer Reviews: Look for consistently high ratings on independent platforms like Google Reviews or ProductReview.com.au. Well-regarded Brisbane installers include MC Electrical, Sunlogics Solar & Electrical, and Optimum Solar Energy, who are frequently praised for professionalism and workmanship.

• Detailed, Transparent Quotes: A good quote will clearly list the exact make and model of the solar panels and inverter, not just vague terms like “tier one panels”. It should also detail all warranties.

• Local Experience: An installer familiar with the local network distributor, Energex, will be better equipped to manage the grid connection process smoothly.

Types of solar panels available in Brisbane

The solar panels offered in your quote will have the biggest impact on your system’s performance. Most modern panels use monocrystalline cells, which offer high efficiency and a sleek black appearance. They can be broadly categorised into two tiers:

• Great Value Panels: Brands like Trina Solar and Jinko Solar are the most popular choices in Australia. They offer a fantastic balance of high performance, reliability, and cost-effectiveness, backed by strong 25-year warranties.

• Premium Panels: Brands such as REC and SunPower are considered top-of-the-line. They come at a higher cost but deliver market-leading efficiency rates and often have even longer warranty periods, making them ideal for maximising power generation on smaller roofs.

The Brisbane solar panel installation process

Understanding the timeline from signing a quote to generating power helps set clear expectations. The entire process in Brisbane typically takes between 4 and 12 weeks.

• Step 1: Consultation and System Design (1-2 weeks): After you accept a quote, the installer will conduct a final site inspection to confirm all measurements and design the optimal panel layout.

• Step 2: Energex Grid Connection Approval (1-5 weeks): Your installer submits a connection application to Energex. For standard 6.6kW systems, this approval is often quick, but more complex systems may require a technical review.

• Step 3: Installation (1-2 days): The physical installation of the panels, mounting hardware, and inverter is usually completed within a couple of days.

• Step 4: Meter Exchange and Commissioning (1-4 weeks): After installation, your installer submits compliance forms. Your electricity retailer then requests Energex to exchange your old meter for a smart meter that can track exported energy. Once this is complete, the system is officially commissioned.

Brisbane’s solar generation potential

Brisbane is one of Australia’s best capital cities for solar energy generation due to its high number of sunny days. The city averages around 4.8 to 5.1 peak sun hours per day, which is the key metric for calculating solar output.

For a well-positioned 6.6kW system in Brisbane, you can expect to generate an average of 27-28 kWh of electricity per day throughout the year. This is typically more than enough to cover the daily consumption of an average family, with the excess energy exported to the grid for a feed-in tariff credit on your bill.

Case Study: A Family in Chermside The Nguyen family was dealing with quarterly electricity bills approaching $700. They received a quote for a 6.6kW solar system using Trina panels and a Sungrow inverter for a total cost of $5,800 after the STC rebate. Their average daily energy production is now over 27 kWh, which has slashed their grid electricity usage. Their annual savings are now over $1,100, putting them on track for a payback period of just over 5 years, and their last bill was in credit.

Key questions to ask your solar panel installer

Before signing any contract, make sure you have clear answers to these critical questions:

• Who is performing the installation? Are they an in-house team or subcontractors?

• What are the full warranty details? You should receive separate warranties for the panels (product and performance), the inverter, and the installer’s workmanship. A 10-year workmanship warranty is a sign of a confident installer.

• Is the quote fully inclusive? Does it cover all costs, including safety equipment, metering changes, and any potential switchboard upgrades?

• How do you calculate the projected savings and system size? A good installer will ask about your energy usage patterns, not just look at your total bill, to ensure the system is sized correctly for your needs.

• What after-sales support do you offer? Reputable companies will provide support with system monitoring and help with any warranty claims down the line.

Getting a Brisbane solar panel installation quote is the first step toward reducing your energy bills and embracing renewable energy. By focusing on quality components, a reputable SAA-accredited installer, and a system sized for your needs, you can ensure a valuable long-term investment.

If you’re ready to explore your options, we can help. We can connect you with trusted local experts who can provide a detailed, no-obligation quote tailored to your home.