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The Price, Output and Payback Period of a 10kW Solar System In Sydney In 2024

Searching for a solar energy solution for your home? A 10kW solar system might be the perfect fit for you. In this guide, we'll explore the key factors to consider when making this decision. We'll delve into why a 10kW system is a popular choice. Let's uncover the financial benefits, and guide you through the different system options. By the end, you'll be equipped to assess if a 10kW solar system is the right solution for you.
Tom Sedgwick
Updated at
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3 min

The Price of a 10kW Solar System in Sydney

The cost of going solar has dropped significantly, making it a more accessible option than ever for Sydney families. You might be surprised to learn that a high-quality 10kW system can be installed for less than $9,000.

However, for larger homes, maximising the benefits of solar means considering additional features. Almost all our customers prefer to get a system with panel-level optimisation because it gives them a lot of benefits in managing, monitoring, performance, and system longevity.

A 10kW SolarEdge system starts at about $9,000, while a 10kW Enphase system starts at around $11,500, including installation.

Let's talk about some important numbers, like the price of a 10kW solar power system. Which brands should you consider for this system size?

In Sydney, a good 10kW solar power system starts at $9,000 including a SolarEdge inverter, top-quality solar panels like Trina Vertex Modules, and standard installation.

It's good to know that with solar panels, usually, the more you pay, the better quality you get. Most of our customers go for high-quality panels from brands like 1KOMMA5°. These top solar panels with Enphase Microinverters cost around $13,000.

You might find a cheaper 10kW solar system for under $8,000, but usually, these have cheap panels and after-sales support.

For bigger residential systems, it's smart to spend a bit more upfront to make sure it's reliable, has good output, and lasts long.

As a rough guide, a 10kW solar power system can save up to about $4,000 per year on your power bills. But to save $1,000 in a quarter, you should use a lot of power during the day, especially in summer.

Because of this, many customers considered adding battery storage to their solar panels. If you use your 10kW system well, spending $14,000 on a top-quality system could pay off in less than 5 years.

10KW LG Solar Enphase Prospect

The Price Of A 10kW Solar System With Battery Storage in Sydney

A 10kW solar system with battery storage will often be enough to eliminate a household’s power bills completely.

A 10kW solar system with Tesla Powerwall battery storage starts at $22,500 fully installed. This includes a good quality solar system using Trina Vertex panels and a string inverter. A 10kW Smart Solar System from Enphase with battery storage starts at around $26,000, fully installed.

10kW Solar System Solar Panels In A 10kW Solar System 10kW Cheap Solar Price Good Quality 10kW SystemSolarEdge 10kW System Top Of The Range (Enphase)
10kW Solar System Price23 x 440W Panels Less than $8,000From $7,690From $8,790From $13,290
10kW Solar System Finance23 x 440W Panels From $164.59 per month*From $185.62 per month*From $271.66 per month*
10kW Solar System With Battery Storage23 x 440W Panels + 13.5kWh battery From $22,500From $25,000$From $26,000

*Credit eligibility criteria, terms & conditions, fees & charges apply. The 5.54% variable interest rate is current as of 15/01/2024 and subject to change without notice. The comparison rate of 6.52% is based on an unsecured loan amount of $30,000 over a loan term of 5 years. 

The output of a 10kW Solar System in Sydney

Clean Energy Council guidelines suggest a north-facing 10kW system produces an average of 39 kWh daily. This estimate translates to a higher generation in summer and lower in winter.

However, you can achieve more by opting for premium brands like our Enphase systems. Enphase systems, for instance, can deliver an average of 110% more output for our customers. Imagine sunny summer days when your system generates 60-70 kWh!

While that is impressive, a surplus power might exceed household needs. We often advise splitting the panel array across two orientations to spread power output throughout the day. Additionally, we recommend considering battery storage to contain excess solar power and use it during the evening.

10kW output by month

The key numbers for a 10kW solar system in Sydney

10kW Solar SystemThe Key Information
Number of Panels23 x 440W panels or 24 x 425W panels
Output39kWh a day average (see below)
Potential savings$700 to $1000 a quarter, depending on your cost of power
Average payback period3 to 6 years on average
InvestmentFrom around $9,000 for a top quality system with SolarEdge, or from $13000 using Enphase
Suited toMedium to large homes using on average around 40 kWh a day during the daytime (or over 24 hours with battery storage)

How Much Will a 10kW Solar System Save Me?

Reduce your electricity bill by using more self-generated solar power during the day. Here's where you can maximise your energy savings using solar:

  • Depending on your local rate, you'll save between 22 and 30 cents per kilowatt-hour (kWh) on your electricity bill.

  • Any excess power you generate gets sent back to the grid. Your electricity provider may compensate you for this at 5-8 cents per kWh.

With a 10kW system, you could save $700 to $1000 per quarter on your electricity bill. For more details on how solar power reduces your electricity costs, check out this resource to learn more.

How Many Solar Panels Do I Need for a 10kW System?

The larger the system, the more it will require solar panels. The good news with highly efficient panels is that they require fewer modules and less roof space to achieve your desired energy output.

A 10kW system could utilise 24 high-efficiency 415W panels instead of the standard 30x300W panels. This design has better space utilization on your roof for a cleaner and more aesthetically pleasing installation.

10kW Enphase Microinverter Solar System

Enphase microinverters are flexible when it comes to designing your solar system. They can work with diverse roof configurations, panel orientations, and shading profiles.

It means the designer of your solar setup can arrange everything to get the most power out of your panels. It's like having a puzzle piece that fits perfectly no matter the shape of the puzzle.

The scalability of microinverters translates into cost-effective system growth. Homeowners can expand their solar installations incrementally, spreading the cost of investment over time.

flexible solar array

On larger residential systems, the panels in the middle of the array can get quite hot during summer as airflow under them is less than ideal. When panels get too hot, the output can be significantly reduced. Because of this, we recommend using microinverter technology; in fact, over 80% of our systems now include this technology.

Find out all you need to know about Enphase: 10 key benefits of microinverter systems.

10kW String inverter solar system

String inverters are a good fit for roofs with full sun all day. If you have a wide and open space for 28 to 38 panels (all in one area or maybe two), a string inverter system will work well.

But watch out for shade. Even a little shade on one panel can slow down the entire group of panels connected to it, like a chain reaction. To avoid this, make sure your roof gets consistent sunlight throughout the day.

With a 10kW system, you'll likely have two groups of panels. It's important to choose a trusted brand for your inverter, especially for this size system. Look for companies with a good reputation and long warranties, like Sungrow with their 10-year warranty. This way, you'll be covered if experience any issues with your inverter.

Call us today at 1300 525 451 or fill in your details below to request for a solar and home battery storage quote today to see how much you can save!


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