6.6 kW solar system in Brisbane: A Complete Guide

If you are searching for a solar system for your home, it will not be long until you start seeing the advertisements for a 6.6 kW solar system all around the web you surf. You must wonder what exactly a 6.6 kW solar system is and why everyone is telling you to buy it. Well, we will notify you of this and more about what a solar system is and what it comprises of in our complete guide to the 6.6 kW solar system in Brisbane.

Read through the end of the article to know about the fundamentals of a solar system and why a 6.6 kW size is considered adequate for most households living in Australia.

The Fundamentals of a Solar System

Before jumping into what is a 6.6 kW solar system in Brisbane, let’s first discuss what exactly is a solar system and what its are fundamentals. This information will help you in understanding the concept of a 6.6 kW solar system better.

Note – To clear out for some readers who are new to the solar industry, kWh is spelt as “kilowatt-hour” and is a term that is used to tell about the capacity of the energy generated or supplied by something. To put it into perspective, an average Australian home consisting of 4 members consume around 16 to 20 kWh of power in a day which can be fulfilled by either using solar panels or the grid or, better, both!

There are mainly four pillars of a solar system, namely –

  • Solar Panels
  • Solar Inverters
  • Racking for Solar Panels
  • Monitors which note your consumption

No. 1 – Solar Panels

Solar panels are the most fundamental part of solar and are known by the majority of people. To put it in simple words, it is the equipment that converts the sunlight into energy which you can use in your homes or sell to the grid to enjoy feed-in tariffs (we will talk about this in detail later in the article)

The solar panel comprises solar cells arranged in a pattern. You have majorly two options for cell types in solar panels, and they are the monocrystalline cells and the polycrystalline cells. If you are confused already about which one to choose, let me tell you that the difference between them is negligible and you can choose anyone you want or the one you find for cheap. Also, to clear it out, the polycrystalline panels are generally found in the traditional blue colour, and the monocrystalline ones are located in the industrial black colour.

No. 2 – Solar Inverters

Your solar panels generate energy which is in the form of Direct Current or DC. This type of energy is unsuitable for your home use because all of your appliances run on Alternating Current or AC. That’s where the requirement of a solar inverter becomes vital.

A solar inverter is a device that converters the DC energy generated by your solar panels into AC which is suitable for your home appliances.

Also, you should keep in mind that the inverter is the heart of your solar system, and the failure of it will make your whole solar system die, so getting a quality inverter is mandatory, even if it costs some bucks more than its alternatives. Our brand of choice will be Fronius as their inverters are trusted globally in the market, and they are also the largest manufacturer of solar inverters in the world.

Types of Inverters

So when talking of inverters, it will be best to brief you about the types of inverters available in the market for you to buy. Majorly there are two of them, i.e. String Inverters and the Micro-Inverters

String Inverters

If you get a string inverter, it is the only thing needed to complete your inverter needs, It might sound funny, but you will get more sense of it after knowing about micro inverters.

The String Inverters are named so because all the solar panels are connected through a string with the inverter. The string inverter is much more prominent in size when compared to the microinverters, and the failure of it will fail the whole system.

Micro Inverters

The Micro inverters, unlike the string ones, are connected individually to all the solar panels to convert the energy of each forum one by one. These inverters are called micro because they are much smaller in size when compared t the string inverters.

The Micro inverters carry many advantages compared to string inverters because as they are individually connected to each solar panel, then the failure of one of the inverters will not cost the system to stop, which is seen in the case of string inverters. Also, as they are individually connected, they can be configured separately, which helps in increasing the overall efficiency of your system.

No. 3 – Solar Panel Racking

Racking is a place for your solar panels to rest for the period of their operation. In other words, it is an aluminium frame on which the solar panels are kept for their excellent working. The racking is created for each solar setup as it is different for every system. The racking quality is something you should keep an eye on as solar panels are a long term investment, and the racking will handle those panels for over 30 years.

No. 4 – Consumption Monitor

The consumption monitor is a device used to track your energy generation and consumption to get a better idea of your solar system.

This monitor helps monitor your solar system with ease, and it is highly recommended to get one. The consumption monitor is not a necessary part of the working of your solar system, as your solar panels will generate energy without that.

But getting one will bring you many benefits like:

·       To Know if your investment is paying off: solar panels are a hefty investment and is not something everyone can afford. If you have one, then you should keep track of the energy usage to know if your investment is paying off itself or not.

·       To know if the panels require maintenance work: Your solar panels are built to be capable of self-cleaning and don’t require much maintenance. But if you live in an area with high pollution and dust, then care will become essential as the dust and pollution can hinder the efficiency and capacity of your solar panels, which is what you don’t want.

There are many other advantages of getting a consumption monitor, but we will tell you about them in some other article.

These were the fundamentals of a solar system which were essential for you to know to get a basic understanding of it.

Now let’s talk about the much-hyped 6.6 kW solar system.

Panels Required for a 6.6 kW solar system in Brisbane

This depends on what type of solar panels you choose to get for your solar installation, whether they are high power generating or moderate power generating. For example, if you use the modules which can generate up to 370 watts of power, then your solar system will be complete in 18 modules and will yield slightly more than 6.6 kW

Space Required for a 6.6 kW solar system in Brisbane

If you are considering getting the 6.6 kW system installed on your rooftop, then it will depend upon the type of panel you chose for the installation.

To give you a rough idea, a middle-sized solar panel is approx. 1.8 meters tall and 1 meter broad. If you are installing these kinds of panels on your rooftop, then it will take you slightly more than 32 sq. meters of space to get a 6.6 kW system installed. Now you can understand how significant your roof is to occupy these panels, and you can alter your decision well.

Electricity Generation by a 6.6 kW solar system in Brisbane

To sum it all, it majorly depends upon the position of your house and the positioning of your solar panels according to the sun. The quality of panels and inverters you install also plays a significant part in this.

But again, to give you a rough idea, we will take an ideal situation of a 6.6  kW solar system in Brisbane. An average solar setup installed in Brisbane will generate more or less 24-kilowatt hours of electricity in a day. As we told you earlier, an average Australian household’s daily usage is around 16 to 20 kWh of energy, so this kind of solar system will be more than enough for you in any case.

Also, you should know that the unused energy will be sold to the grid at a price that depends on your location. In Brisbane, the usual price paid to you by the grid is 17c per kWh supplied to the grid, so you can also enjoy feed-in tariff while minimizing the energy usage from the grid.

You should also know that the more you consume your energy, the more you earn from it because the grid buys the power at a lot less price from you than it supplies it. So if you maximize your self-consumption, you can get the most out of your solar setup.

Cost Required for a 6.6 kW solar system in Brisbane

The cost required in installing a 6.6 kW solar system varies based on the quality of products and the reputation of the installers. But to give you a general idea, the 6.6 kW system costs around $5,500 to $9,000 in Brisbane. This price can go up and down based on the time you are reading this or the installer you are getting your system from.

Payback Period for a 6.6 kW solar system in Brisbane

The Payback period of a 6.6 kW solar system is a lot less than bigger solar setups. That’s why it is called an adequate size for home installation. The general payback period of a 6.6 kW solar system in Brisbane is around 5 to 6 years. This means that the solar panels will pay for themselves in a matter of 5 years, and after that, all the energy they generate will be profit. So, theoretically speaking, the solar panels you install today on your rooftop will cost you ZERO Dollars after five years. Now that’s interesting!

Inverter Required for a 6.6 kW solar system in Brisbane

As you understood in the fundamentals that an inverter is an essential part of any solar system, and so the question can arise that what will be the adequate size of getting an inverter for a 6.6 kW solar system?

Our answer to that will be 5 kW! Now you may debate why not a 6 kW inverter is used with a 6.6 kW solar system? Well, this is because the solar panels you install doesn’t work on the output they are rated for, this is because solar panels lose around 10% of their capacity on 25 degree Celsius of temperature. You are well aware of how hot Australian Summers can get.

Another reason why a 5 kW inverter is recommended with a 6.6 kW installation because it is the maximum limit allowed by the grid to be connected with the solar system.


So here is the complete guide to getting a 6.6 kW solar system in Brisbane. In this guide, we told you everything you need to know about the 6.6 kW solar system, along with the fundamentals of a solar setup.

If you are looking for a residential solar setup, then 6.6 kW will be the adequate size because it will generate more than enough energy for you, which will help you reduce the energy bills.

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About Solar 

About Solar: According to the Australian Energy Council report, around 15% of Australian household has installed a solar system at their home. This shows that the solar revolution has begun in Australia. That means around 1.6 million homes have been producing their own solar energy and reducing carbon footprint & electricity bills. For the last couple of years, you […]

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