10kw solar panel system price nsw, number of panels, daily produce, payback period in details

A 10kw Solar System is likely to be the biggest as residential systems get. But it is also the common name among many residential and commercial solar users in Sydney. The 10kw solar system can absorb 37kw power/per day on average. With 28 panels of 370 watts each.

10kW solar installation

Why one should go for a 10kw Solar System?

There are some certain reasons to go for a 10kw Solar System, the reasons are: 

  • If someone uses more than 35kw electricity per day then this system is the best option. ∙ When the electricity demand is higher during winter 
  • If anyone has a plan to add the battery. 
  • If anyone plans to get an electric vehicle 


Size Limits for Solar in Sydney: 

In Sydney, a Single phase connection is allowed to have a solar system sized up to 6.5kw And a three-phase connection is allowed to install a solar system sized up to 30kw. 

Most businesses have a three-phase connection, but in terms of houses, a single-phase connection is common in Sydney. But many houses have a three-phase connection. So a 10kw system is allowed for those houses. They could easily go for a 10kw solar system if their electricity demand is high

10kw solar system price nsw

Is the 10kw System the best option?

Average consumption of electricity per day is the main fact to be analyzed for knowing whether the 10kw system is right for you or not. If your daily consumption of electricity is between 32kwh to 40kwh then u must go with the 10kw system because this is said to be the ideal size of a solar system for houses and business that uses 40kwh electricity daily during daylight. This would generate a similar amount of electricity daily and also would allow you to increase comfortably your daily consumption of electricity if needed.  

This system is also recommended to ensure the maximum return from your solar system.  

But for a note: all the heavy appliances should not be run at a time; the run time should be divided so that the solar system can ensure the supply of power to meet the requirement. 

Though 5kw and 6.6kw systems are very common in Sydney 10kw system is also on the large side. This is the perfect choice for houses that use large amounts of electricity daily and also for the business with consumption of electricity on average 40kwh per day.  So, the bigger is the better.

10kw solar system size

A 10kW solar system is one of the largest solar PV systems available for domestic use, and is ideal for large houses and home offices. Here’s what you should know before you buy one. This solar system is usually set with 27pcs of 370w solar panels  (27 PCs X370w) =9.990 kW known as 10 kW, just short of 0.01 kW. Another format of 10 kW Solar systems usually consists of 28 panels. To be more specific a 10 kW solar system needs 28 panels if each panel is 370w. So, the calculation is such: 28 X 370W = 10360w

How much does a 10 kw solar panel system cost in Sydney?

Generally, to install a 10kw solar panel you have to spend about $5000 to $7000 in Sydney. The price or cost of the 10kw Solar system varies depending on the quality of the component.  

If you want to get your 10kw Solar System with a good quality installed by professionals or a renowned solar company in Sydney, you have to spend about $10000. 

But as of January 2022, the average cost of a 10kw Solar panel in Sydney is $0.70per Watt or $7000 after rebate. The package consists of Panels, roof mounting, and an electrical kit. price may change any anytime please call us (1300 131989) or send a message for today’s best price.

How much roof space is occupied by a 10kw Solar System? 

Generally, it would need 600 square feet of roof space to install a 10kw solar system. But still, it depends on the size and wattage of the panels.  

As a 10 kW Solar System consists of 28  panels then it would occupy an area of 51.338  square meters.  Visit for Size & Dimension.

If it needs 34 panels so it would need 54.4 square meters of roof space because usually, each panel is about 1.6m x 1m.  

It will need more space if a tilt frame is required. 

How Much energy can be generated by this system? 

The amount of energy generation by 10kw Solar system depends on: 

  • Location of the House 
  • Position of the Panels 
  • Local climate
  • Sunlight peak hour 
  • Angel of the panels. 
  • Position of the system 
  • Shade casting 
  • Quality of the panels 
  • Individual performance of battery, inverter, and panels. 

Depending on the above factors a 10kw Solar System produces 35-40kw energy per day in Sydney. 

Australia’s Capital cities wise Solar Energy chart :

10kW solar system output by capital city (per day)
Adelaide36 – 41 kWh
Brisbane39 – 41 kWh
Canberra36 – 41 kWh
Darwin42 – 46 kWh
Hobart29 – 33 kWh
Melbourne31 – 36 kWh
Perth40 – 44 kWh
Sydney35 – 40 kWh

This system produces enough power for a big house if the bill is above $1100 per quarter.  

It is also said that 40kw per day is enough to run 2-3 houses in Sydney. Which means it produces approximately 12000 kilowatt-hours a year.  

But the power generation changes with the season. During summer solar panels produces more energy while less energy is produced by solar panels in winter compared to summer.  

Savings or Benefit from a 10 KW Solar system: 

There are two types of saving or benefit that can be got from a 10kw solar system: 

  • Self-Consuming: This is the primary benefit of having a 10kw Solar System. Use as much energy as needed from the generated power by the 10kw solar system directly and reduce your electricity bill up to 80% per quarter. 
  • Feed-in tariff: This can be said the Secondary benefit of having a 10kw Solar system on the roof. After self-consumption, the excess power will go to the electric grid. Though the feed-in tariff price is lower than the price we pay for direct electricity. In Sydney, the Feed-in tariff price is 20 cents per kilowatt-hour. So with the above factors if we consider the below scenario, then the payback would be as such 
  • In the 1st scenario: If you use all the power generated by your 10 kW solar system, then you would likely save approximately $5000 in the first year. 
  • In the 2nd scenario: If you use 50% of the electricity and feed-in tariff the rest, then you would save approximately $2500 in the first year.
  • In the 3rd scenario: If you feed-in tariff all the power generated by your 10kw solar system, then you would save approximately $1200 n the first year. 

So, you should use more power to save more money or get more benefit from your 10kw Solar System. 

The payback time of the 10kw Solar System: 

The payback period depends on how much power is generated by the system and the generation of power depends on the location, climate, panel size, consumption of power, inverter performance, and roof layout.  

If someone uses more than 30/kWh per day, then the payback period most likely would be 6 to 7 years. 

One can make more than $70000 within 25 years of system life. 

If you are using all the electricity on-site then a 10kW will have paid for itself in under i5 years, assuming you pay 30c for your electricity from the grid and electricity prices rise at 5% per year. After that the electricity is free apart from a small maintenance cost (expect to pay $500-$700 every 5 years) and a replacement inverter every 15-20 years. 

payback period 10kw solar panel

Battery Backup with the System: 

It is really great that a 10kw solar system can add battery backup. The battery backup allows using solar energy both day and night. It can be connected with any compliances or electric property of your house to absorb the power directly. But it can prolong the backup period as it costs a little higher.  

It will cost you $10000 to $12000 for the package of 10kw Solar System with a battery backup. The price is not so low I must say.  

Usual grid-connected solar is made to export excess electricity on its own, but while connected to the battery it is not able to do so.  

Moreover, while one can use a 10kw solar system for 25 years without replacing, (with a low maintenance cost) the battery would need a replacement after 10 years. This is not an advantage. 

What size inverter for 10kw solar system?

For a 10 kW solar system, the ideal size of the inverter would be 8.2 kW, because according to the rule, one can have a solar system oversized by 133% in Australia. You can also use a 10 kW inverter, but an 8.2 kW inverter would be more appropriate because 

  • It produces more power. 
  • Easy to get connected with the electrical grid. 
  • It certainly saves money to install a system with a panel capacity bigger than inverter capacity. 
  • Inverter determines the maximum panel capacity 

The 10 kW solar system also needs a three-phase connection. It would be costly to install a 10 kW solar system with a single-phase connection because additional changes need to be done  

Another important implication of size limitations is solar feed-in tariff eligibility. iSystems over a certain size may be approved for installation, but not for exporting energy to the grid, which means no solar feed-in tariff benefit. This in turn means that the household in question should do everything they can to self-consume as much solar energy as possible to ensure that none of it is wasted. Sometimes, the feed-in tariff limit is set by your electricity retailer into the network. 

Another perfect size for high energy-consuming houses and businesses with small needs is a 15 kW Solar system. It occupies more space on the roof as it consists of 37 to 40 panels depending on the capacity of each panel. 

It will cost around $9400 to get the whole 15 kW solar system in Sydney. 

Solar World Power offers a lower price for the package. 

How to get the system: 

First of all, before jumping to buy it you should have market research. Compare the prices. It is easy to get price quotations for solar systems from our company. We provide online quotes through email. You can also call us and ask for the price quotation. We should send you an email with the price quoted. Thus, you can compare the prices and also the quality; I would suggest you go with the quality even with a high price if there is no budget issue. After you have intended to buy the solar system, you just need to call us or message us and provide your details. It will take a max of 2 to 3 days to come to your place and work of 5 to 6 hours to install the system on your roof.