Residential Solar System

6.6kW, 9.9kW & 13.2kw Solar System: Comparison & Specifications

Solar energy has gained significant popularity in recent years as a clean and sustainable alternative to traditional energy sources. If you’re considering installing a solar panel system for your home, it’s essential to understand the different sizes available and their specifications. In this blog, we will compare and explore the specifications of three solar system sizes: 6.6kW, 9.9kW, and 13.2kW. By the end, you’ll have a clearer understanding of which solar system size is best suited for your home.

Comparison & Specifications Of 6.6kW, 9.9kW & 13.2kW Solar System

Solar panel systems come in various sizes, and each size has its own set of specifications and benefits. Let’s delve into the details of the 6.6kW, 9.9kW, and 13.2kW solar system sizes to help you make an informed decision.

6.6kW Solar System

A 6.6kW solar system is a popular choice for many homeowners due to its balanced power output and affordability. This system size typically consists of around 20-24 solar panels, depending on the panel wattage. The power output of a 6.6kW solar system varies based on factors such as location, orientation, shading, and panel efficiency.

How Much Power Does A 6.6kW Solar System Produce?

On average, a 6.6kW solar system can generate approximately 8,580 to 10,200 kilowatt-hours (kWh) of electricity annually. This amount of energy is usually enough to meet the needs of an average-sized household, reducing reliance on the grid and saving on electricity bills.

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How Many Solar Panels Do I Need For 6.6kW?

To achieve a 6.6kW solar system, you would typically require around 20 to 24 solar panels, depending on the panel’s wattage and efficiency. It’s important to consult with a solar professional to determine the optimal number and configuration of panels based on your specific needs and available roof space.

9.9kW Solar System

For larger homes or households with higher electricity consumption, a 9.9kW solar system may be the ideal choice. This system size provides greater power output, making it suitable for accommodating larger energy demands.

How Much Power Does A 9.9kW Solar System Produce?

A 9.9kW solar system has the potential to generate approximately 12,870 to 15,300 kWh of electricity annually. This increased power production can effectively cover the energy needs of larger households or homes with energy-intensive appliances.

How Many Solar Panels Do I Need For 9.9kW?

To achieve a 9.9kW solar system, you would typically need around 30 to 36 solar panels, depending on the panel wattage and efficiency. The number of panels required can vary based on factors like geographic location, available sunlight, shading, and the specific energy requirements of your household.

13.2kW Solar System

If you have an exceptionally high energy demand or plan to incorporate additional electrical features like electric vehicle charging stations, a 13.2kW solar system might be the best fit for your home. This larger system size can handle substantial energy consumption and is well-suited for larger properties.

How Much Power Does A 13.2kW Solar System Produce?

On average, a 13.2kW solar system can produce approximately 17,160 to 20,400 kWh of electricity per year. This substantial power output allows for the efficient operation of energy-demanding appliances and enables you to reduce or eliminate your reliance on the grid significantly.

How Many Solar Panels Do I Need For 13.2kW?

To achieve a 13.2kW solar system, you would typically require around 40 to 48 solar panels, depending on their individual wattage and efficiency. The specific number of panels needed may vary based on factors such as geographic location, roof orientation, shading, and energy consumption goals.

Choosing The Best Solar Panel System

When deciding on the best solar panel system for your home, it’s crucial to consider several factors. These include your energy requirements, available roof space, budget, and long-term goals. Consulting with a reputable solar provider or installer can help you determine the most suitable system size and panel configuration based on your unique needs and circumstances.


In conclusion, the choice between a 6.6kW, 9.9kW, or 13.2kW solar system depends on your specific energy needs and the size of your property. A 6.6kW solar system is ideal for average-sized homes, while a 9.9kW system offers more power for larger households. For those with high energy consumption or additional electrical features, a 13.2kW system provides ample power generation.

Remember to assess your energy requirements, consult with our professionals, and consider the available space and budget before making a decision. By installing the right solar panel system, you can harness the sun’s energy, reduce your environmental footprint, and enjoy the long-term financial benefits of renewable energy. 

Get a free quote from Isolux Solar, the best solar installer in Sydney.

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