Ready to Cut Your Power Bills?

If you’re considering solar, knowing how much you could save is a great place to start. This guide walks you through the steps to estimate your annual electricity bill savings and choose the right system size for your home.

Step 1: Find Your Annual Electricity Usage

Start by reviewing your last 4 electricity bills and add up the total kilowatt-hours (kWh) used—or look for the yearly total listed by your provider. This figure is key to sizing your solar system.

Step 2: Estimate the Right System Size

Based on your usage and the size of your home, here’s a guide to choosing a realistic solar system size:

Household Type	System Size	Notes
Small Home / Townhouse	4–5kW	Only suitable where roof space is limited
Standard 3-Bed Home (2–3 people)	6.6kW (15 × 440W panels)	Minimum recommended size
Medium Home (3–5 people)	8–10kW	Ideal for families with higher energy needs
Large Home (5+ people)	Up to 13.2kW (30 × 440W panels)	Max for single-phase power; requires large roof

Note: The bigger the system, the more STC (rebate) credits you’ll receive—so larger systems often offer better value over time.

 

Step 3: Estimate Your Solar Production

In Brisbane, solar panels generate about 4.2 kWh per kW per day. Multiply that by your system size and then by 365 to get your estimated annual output.

Example for 6.6kW system:

 6.6 × 4.2 × 365 = ~10,100 kWh per year

 

Step 4: Estimate Your Electricity Bill Savings

Now take your estimated annual solar output and multiply it by your current electricity rate (e.g. $0.28 per kWh).

Example:

 10,100 kWh × $0.28 = ~$2,828 in potential annual bill savings*

*Actual savings may be lower depending on usage habits and feed-in tariff rates, especially if you’re not using the power during the day.

 

Step 5 (Optional): Consider Adding a Battery

Adding a battery allows you to store your unused solar energy for use at night—further reducing reliance on the grid. From July 1, 2025, the Cheaper Home Batteries Program offers a 30% rebate on home battery installations, making this option more affordable.

Final Thoughts

Solar isn’t one-size-fits-all. Your savings depend on how much electricity you use, your roof size, and when you use power during the day. But with Brisbane’s sunny climate and generous rebates, the payback period for solar is getting shorter every year.

Ready to start saving with solar?

Contact Solenergi for a free quote and expert advice on the right solar system for your home. Let’s make the switch to solar energy simple and stress-free.

The Influence of Location on Solar Savings

Brisbane’s diverse suburbs experience varying levels of solar irradiance, which can influence the efficiency of solar panels.

For instance:

Sunnybank Hills:

• Average Annual Solar Production: Approximately 14,400 kWh
• Potential Annual Savings: Up to $2,200

Carindale:

• Average Annual Solar Production: Around 13,900 kWh
• Potential Annual Savings: Up to $2,050

 Ipswich:

• Average Annual Solar Production: Approximately 13,200 kWh
• Potential Annual Savings: Up to $1,950

We’ve calculated the following suburbs based on a 10 kW system (standard for a medium to large home) in the Brisbane region, using an average baseline of ~15,330 kWh/year

• Wynnum: 14,700 kWh  
• Belmont: 14,950 kWh  
• Ashgrove: 15,100 kWh  
• Indooroopilly: 15,200 kWh  
• Kenmore: 15,000 kWh  
• Taringa: 15,150 kWh  
• Mount Ommaney: 14,850 kWh  
• Greenslopes: 14,600 kWh  
• West End: 15,300 kWh  
• New Farm: 15,330 kWh  
• Bowen Hills: 15,250 kWh  
• East Brisbane: 15,100 kWh  
• Buranda: 14,900 kWh  
• Jindalee: 14,700 kWh  
• Pullenvale: 15,000 kWh  
• Upper Brookfield: 15,050 kWh  
• Bellbowrie: 14,800 kWh

These estimates highlight the importance of considering local solar potential when planning a solar installation.

Factors Affecting Solar Efficiency

Several elements can impact the performance of your solar system:

• Roof Orientation and Angle: North-facing roofs with a tilt angle matching the latitude yield optimal results.
• Shading: Trees or nearby buildings can reduce solar panel efficiency.
• System Size: Larger systems can generate more electricity, leading to higher savings.

Customisation is Key!

Understanding the specific characteristics of your suburb can help in making informed decisions about solar installations. By tailoring your system to local conditions, you can maximise savings and contribute to a greener Brisbane.

Ready to start saving with solar?

Contact Solenergi for a free quote and expert advice on the right solar system for your home. Let’s make the switch to solar energy simple and stress-free.

Understanding Solar Savings in Brisbane

Brisbane’s abundant sunshine makes it an ideal location for harnessing solar energy. By installing solar panels, households can significantly reduce their electricity bills. Let’s delve into the potential savings for different household sizes:

Single-Person Household:

• Average Annual Electricity Bill: Approximately $1,200
• Estimated Savings with Solar: Up to $800 per year

Family of Four:

• Average Annual Electricity Bill: Around $2,000
• Estimated Savings with Solar: Up to $1,400 per year

Large Household (5+ People):

• Average Annual Electricity Bill: Approximately $2,800
• Estimated Savings with Solar: Up to $2,000 per year

These figures are estimates and actual savings can vary based on energy consumption patterns and system efficiency.

Maximising Savings with Battery Storage

Adding a battery to your solar system allows you to store excess energy generated during the day for use at night, further reducing reliance on the grid. With the new 30% federal rebate on home batteries effective from July 1, 2025, the cost of battery installation has become more affordable, enhancing the return on investment.

Final Thoughts

Investing in a solar system is a smart move for Brisbane residents looking to cut down on electricity costs and contribute to a sustainable future. With government incentives and the city’s sunny climate, the transition to solar energy has never been more appealing.

Ready to start saving with solar?

Contact Solenergi for a free quote and expert advice on the right solar system for your home. Let’s make the switch to solar energy simple and stress-free.

Meet the Thompsons: Sarah and James, parents of two young kids, live in Sunnybank Hills in Brisbane’s south. Like many Aussie households, their electricity bills were steadily climbing—averaging around $1,560 a year.

Making the Switch to Solar

In early 2024, the Thompsons decided to take control of their energy costs by installing a 6.6kW solar system through Solenergi. With around 40% of their energy usage during daylight hours, they were able to directly consume a large portion of the power generated from their panels.

After switching to solar, the Thompsons’ annual energy bill plummeted. In fact, thanks to Queensland’s feed-in tariffs and smart daytime usage, they are now in credit most months, with estimated first-year savings of over $1,200.

The Next Step: Battery Storage

To take things even further, the Thompsons have decided to add a 10kWh battery, made more affordable through the federal government’s Cheaper Home Batteries Program—a rebate of 30% off the upfront cost. With the battery storing their excess daytime solar energy for use at night, their reliance on the grid is expected to shrink dramatically.

Once the battery is installed, their total electricity bill is forecast to drop to around $150 per year. That’s a saving of approximately $1,410 annually compared to their pre-solar expenses.

The Results: Real Savings for Real Families

Scenario	Annual Electricity Cost	Annual Savings
Pre-Solar	$1,560	$0
With Solar Only	In credit or < $50	~$1,200+
With Solar + Battery	~$150	~$1,410

 

Why It Works

Daytime Usage: 40% of power used during the day, directly from solar
Smart Feed-in Tariff: Extra energy exported = extra credit
Battery Storage: Reduced grid reliance at night
Rebates & Incentives: Helping make clean energy affordable

Over 20 years, systems like this are projected to save homeowners more than $16,000 in power bills, with a 6–7 year payback period even without including environmental benefits.

Environmental Impact

Choosing solar doesn’t just make financial sense—it’s also better for the planet. A typical 6.6kW solar system like the Thompsons’ saves each year:

• Equivalent to planting 202 trees
• Avoids burning 3,362 litres of petrol
• Saves 3,821 kg of coal from being burned

Thinking About Solar for Your Home?

Now’s the perfect time. With strong government support and smarter, more efficient systems, solar has never been more accessible.

Contact Solenergi today for a free quote and expert advice tailored to your home.
Let’s make your power bills a thing of the past.