When we talk about the 6.6 KW system, it is a standard system installation, but the question is, why does everyone offer a 6.6 KW System? Here is the reason for all your queries regarding the 6.6 KW System. Here you can see more about what the features and products present in 6.6 KW: https://esteemenergy.com.au/packages/ 6.6 kW System generates 22-30 kWh. The solar system generates more electricity per day, which will be fed into the house first, i.e., what you consume will be saved as money as you are not taking this electricity from the grid to any higher price. The remaining excessive electricity that has not been destroyed will be sent into the grid,and from that, the electricity retailer will provide credit, known as the Feed Tariff.

Tip: The most effective and efficient way to increase your savings from the system is to consume electricity as much as you can.

At the time of quoting, we have seen a 6.6 Kw system goes with a 5kw inverter, so here are all the reasons:

In Australia, a federal-based incentive goes with solar, known as STC or small trade certificate, which is calculated on the size of the solar system, installation state/territory, and deeming period for these STCs. It is a financial incentive for households and businesses to install solar power systems, thereby promoting the use of clean energy sources.

The STC scheme allows for solar inverter capacity to be oversized by 33% compared to the power of the solar panels installed at the premises. This means that the inverter’s degree can be larger than what the panels can generate by up to 33%. This might be done to accommodate potential future expansion of the solar panel array or to take advantage of higher energy generation during certain conditions. And this same rule applies across the Clean Energy Council and electricity distributors. This could mean that the Clean Energy Council, a trade association representing Australia’s clean energy sector, and the electricity distributors who manage the poles and wires for electricity distribution also adhere to this 33% rule in some capacity, likely about solar power system installations.

For a 6.6kw system, one has to pay around $5000- $9000 for better product, installation, and service, of course, done by one good solar company. 

We have seen that most of the time, everyone has to enter the postcode for details and offers that any company offers, which creates a long-term process for them to come to any conclusion, and after that, they back off from installing solar. 

To avoid that situation, we can have some options for them, which are:

1. Choose your references.
2. Research different solar panels, features, prices, companies, and packages to choose wisely.
3. To save time, directly call the customer service number.

Key Features of a 6.6 Kw system

Here are all the features mentioned below of the 6.6 kW system:

System Size and Number of Panels:

A 6.6kW solar system using 330W to 400W modules typically consists of 17 to 20 solar panels, saving up to $ 400 – $600 on your electricity bill. The exact number of meetings can vary based on the wattage of each panel.

Panel Dimensions:

Each solar panel generally measures around 1.7 square meters (m2). This measurement can vary slightly based on the manufacturer and specific model of the board.

Roof Area Requirement:

To install a 6.6kW solar system, you’ll need approximately 34 to 38 square meters of roof area. This area considers the panel’s; size and their arrangement on the roof. The required area can vary depending on factors like the tilt of the meetings, spacing between boards, and the roof layout.

Tilt Frames:

Tilt frames are additional structures that allow solar panels to be angled for optimal sunlight exposure. They require more spacing between boards than panels mounted flush on the roof. If you choose to use tilt frames, the roof necessary area might be slightly larger to accommodate the spacing needed for the tilted panels. 

Working with a qualified solar installer to assess your specific roof layout, orientation, shading, and local regulations is important before installing a solar system. They can provide a more accurate estimate of the number of panels needed and the precise roof area required to achieve the desired energy output.

Energy produced by 6.6 KW system:

The actual power output of a solar power system, including a 6kW system, can vary significantly based on various factors. These factors can impact the overall energy production and efficiency of the system. Here are the main variables that influence the power output of a solar power system:

Location and Local Climate:

The sunlight a solar system receives greatly depends on the geographic location and local climate conditions. Areas with more sun exposure will generally generate more energy. Cloud cover, air pollution, and atmospheric conditions also affect sunlight availability.

Orientation and Tilt Angle:

The direction your solar panels face (north, south, east, or west) and the angle at which they are tilted can impact the system’s efficiency. Optimal orientation and tilt angle will vary based on your location’s latitude and the desired energy generation pattern.


Shade cast on solar panels, even partial shade on a small portion of a forum, can significantly reduce energy production. It’s important to minimize shading, either by trimming nearby trees or positioning panels to minimize obstruction.

Component Performance:

The quality and efficiency of the solar panels and inverter used in the system can impact energy production. High-quality panels and inverters have better performance and conversion rates, leading to higher output.

System Efficiency:

The system’s efficiency, including wiring, connections, and conversion losses, affects the amount of energy that reaches your home’s electrical system. A system efficiency rate of 75% is relatively conservative, but factoring in these losses is important.

As for the rough approximations you&’ve mentioned based on Bureau of Meteorology and PVWatts data, it’s important to consider these as general estimates. Actual energy yields can vary from these estimates due to the dynamic nature of weather conditions, panel degradation over time, and other unforeseen factors.

Your note about energy yields being higher in summer and lower in winter is correct. Solar panels typically generate more energy during sunnier and longer summer days and less power during shorter, cloudier winter days.