11kW Solar System in Sydney: Key Facts and Figures 2025
The combination of historically low solar costs and attractive government subsidies is leading to a rise in the adoption of 11kW systems in Sydney homes. Examining key numbers such as the pricing, efficiency, returns, and top brands suitable to an 11kW solar system is essential.
Key Takeaways:
Affordable Pricing with Government Rebates
Thanks to government rebates, an 11kW solar system is now more affordable. A high-quality 11kW system with standard installation starts from $13,200.
High Energy Output and Optimisation
A north-facing 11kW solar system in Sydney produces around 44kWh daily, potentially increasing through advanced technology like Enphase microinverters. Strategic panel design and battery storage further enhance energy usage and efficiency.Significant Savings on Electricity Bills
Homeowners can save between $800 and $1,100 per quarter. Solar savings depend on self-consumption and feed-in tariffs. Maximising solar energy use during daylight hours significantly increases savings.Efficient Use of Roof Space
High-efficiency solar panels reduce the number of panels needed for an 11kW system. Fewer panels means smaller roof space required. Using 25 premium 450W panels instead of 33 lower-wattage panels improves efficiency and longevity.
11kW Solar System Price
As Australia continues its shift towards cleaner, more sustainable energy, solar power has become more accessible and affordable for homeowners. To support this transition, the government offers solar rebates to help families make the switch. The exact rebate amount varies by state — but the bigger the system you install, like an 11kW, the larger your rebate could be.
While there are cheaper solar systems on the market, we don’t recommend going for the lowest price if you're thinking long-term. Budget solar panels often compromise on quality and may lack reliable after-sales support.
A high-quality 11kW solar system with standard installation now starts from under $13,200. This includes trusted components like Sungrow inverters and best-value Trina panels, giving you excellent performance and peace of mind.
An 11kW system can save you over $4,000 per year on your electricity bills. To maximise your savings — up to $1,000 per quarter — you'll want to consume around 65 kWh during the day in summer, when your system is producing the most energy.
If you're ready to make the most of your rooftop, investing in a premium 11kW system could see you break even in as little as 4 years — with decades of clean, low-cost power ahead.
11kW Solar System Output
A north-facing solar panel system in Sydney can produce an average of 44kWh of power daily with more power in summer and less in winter. But with innovative technologies and best practices, your system can generate more.
Enphase systems, for example, can typically deliver 10% more power than 44kWh. You could see over 60kWh on a sunny summer day.
However, that output could be a lot if it exceeds your daily needs. How can we make the most of it?
We recommend splitting the panels across two directions. This distributes power generation throughout the day, ensuring you have power when you need it most.
Consider adding battery storage. Solar battery such as Tesla Powerwall 2 allows you to save excess solar power during the day and use it in the evenings or during blackouts.
11kW Solar System - The Key Numbers
| 11kW System | |
|---|---|
| Number of Panels | 25 x 450W Panels |
| Output | 43kWh a day average (see below) |
| Potential Savings | $800 - $1100 a bill depending on your cost of power |
| Average Payback Period | 3 to 4 years |
| Cost | From around $13,200 |
| Suited to | Medium to large homes using on average around 44kWh a day during the daytime (or over 24 hours with battery storage) |
11kW Solar System Potential Savings
The amount of money you save with an 11kW solar system depends on how much of the solar power you use at home when it's generated. Usually, you'll save about 22 to 30 cents for each unit of solar power you use, depending on how much you normally pay for electricity.
Also, your electricity provider might pay you around 5 to 13 cents for each unit of extra solar power you send back to the grid. So, with an 11kW solar system, you could save around $800 to $1100 on your quarterly bill.
More information is available here: How Solar Power Reduces Your Power Bill
Number of Solar Panels in an 11kW Solar Panel System
Larger solar systems like an 11kW solar system require a lot of solar panels to reach your energy goal. To address this, we recommend using highly efficient solar panels.
High-efficiency panels generate more power per square foot. This means, that for an 11kW system, we can use just 25 high-efficiency 450W panels instead of the older 33 bulkier 335W panels. That frees up valuable roof space.
Moreover, quality panels are built to last, giving you peace of mind and maximising your return on investment over the system's lifespan.
Our Recommendations: 11kW Microinverter System
Over 80% of our designs incorporate Enphase's microinverter technology for maximum performance even in events of partial shading.
This innovation of inverters offers real-time monitoring of individual panel performance. It provides valuable insights into system efficiency and identifies potential issues promptly.
The advantage of microinverters aside from maximising your system efficiency is to improve safety and reliability. They mitigate the impact of single-point failures.
In contrast to string inverters, where a failing panel can disrupt the entire array, microinverters confine the effects of any malfunction to the individual panel. It results in minimising downtime and optimising system uptime.
To learn more about the potential of microinverters, you can explore this resource of 10 key benefits of microinverter systems.
More Helpful Articles:
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