Should I Get A 10kW Solar System?

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Investing in a 10kW solar system can be a game-changer for high-energy-consuming households and small businesses. Typically requiring 25-30 panels and around 80 square meters of roof space, a 10kW system costs between $8,000 and $11,000 across major Australian cities. This system can generate electricity of 33-52kWh daily, depending on location, significantly reducing electricity bills. For households using over 40 kWh daily, this system size offers excellent savings.

The payback period ranges from 2 to 5 years, with quicker returns for higher self-consumption rates. Compare local quotes to find the best fit for your energy needs and enjoy long-term financial and environmental benefits.

Do I Need A 10kW Solar System?

Investing in a 10kW solar system can be a transformative decision for both homeowners and small businesses in Australia. This article will guide you through the essential considerations, including pricing, energy production, and financial returns, to help you determine if a 10kW solar system is the right choice for you.

How Many Panels and How Much Roof Space?

A 10kW solar system typically requires 25 to 30 solar panels, each with an output rating between 330W and 400W. These panels usually measure about 1.7 meters by 1 meter, translating to approximately 80 square meters of roof space. Choosing more efficient panels can reduce the required roof space but might increase the overall cost due to the advanced technology used.

How Much Does a 10kW Solar System Cost?

The cost of a 10kW solar system in Australia varies depending on several factors, including your location, the type of roofing, and the quality of the solar equipment. As of July 2024, the average cost is around $10,390 after the federal STC rebate. Here’s a breakdown of average costs by major Australian cities:

  • Adelaide, SA: Starting from $8,500
  • Brisbane, QLD: Starting from $8,500
  • Canberra, ACT: Starting from $8,300
  • Darwin, NT: Starting from $11,000
  • Hobart, TAS: Starting from $10,000
  • Melbourne, VIC: Starting from $8,200
  • Sydney, NSW: Starting from $8,000
  • Perth, WA: Starting from $9,500

How Much Energy Will a 10kW Solar System Generate?

The energy production of a 10kW solar system depends on factors such as geographic location, panel orientation, tilt angle, shading, and operating temperature. Here’s an estimate of the daily energy output for a north-facing 10kW system in various Australian cities based on our calculators which you can find here:

  • Adelaide: 42kWh
  • Brisbane: 45kWh
  • Canberra: 42kWh
  • Darwin: 52kWh
  • Hobart: 33kWh
  • Melbourne: 37kWh
  • Perth: 47kWh
  • Sydney: 40kWh

modern 10kw solar system

Is a 10kW Solar System Right for You?

A 10kW solar system is ideal for homes with high electricity consumption or small businesses with moderate energy needs. If your daily energy usage exceeds 40 kWh, this system size might be appropriate. The following table provides a general guide:

Daily Energy ConsumptionSolar System Size
5-10 kWh2kW
11-15 kWh3kW
16-20 kWh5kW
21-25 kWh7kW
26-30 kWh10kW

Remember, it’s crucial to self-consume at least 30% of the solar energy produced to ensure you get the best savings. By self-consuming more of your solar energy, you can reduce your electricity bills significantly.

Payback Period by Capital City

The payback period for a 10kW solar system varies by city and self-consumption rate. Here’s an indicative overview of a household using 35 kWh of electricity per day based on our calculator which can be found here.

CitySystem CostSelf-Consumption RateAnnual SavingsPayback Period (Years)
Sydney$8,00030%$2,247.493 years, 6 months, 24 days
60%$3,473.392 years, 3 months, 20 days
Brisbane$8,50030%$2,516.863 years, 4 months, 17 days
60%$3,889.692 years, 2 months, 7 days
Melbourne$8,20030%$2,057.583 years, 11 months, 29 days
60%$3,179.902 years, 7 months, 1 days
Perth$9,50030%$2,630.973 years, 7 months, 12 days
60%$4,066.042 years, 4 months, 2 days
Adelaide$8,50030%$2,381.563 years, 6 months, 27 days
60%$3,680.602 years, 3 months, 22 days
Hobart$10,00030%$1,876.645 years, 3 months, 29 days
60%$2,900.263 years, 5 months, 13 days
Canberra$8,30030%$2,362.003 years, 6 months, 7 days
60%$3,650.362 years, 3 months, 9 days
Darwin$11,00030%$2,913.383 years, 9 months, 13 days
60%$4,502.492 years, 5 months, 11 days


A 10kW solar system can be a fantastic investment for high-energy-consuming households and small businesses. By carefully considering your energy needs, roof space, and local costs, you can make an informed decision that maximises your financial returns and contributes to a sustainable future. If you’re ready to explore solar options, compare quotes from local installers to find the best solution for your energy needs.

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