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Compare Solar Panel Systems by Size 2024

Are you considering having a solar panel system installed on your home? If so, it’s important to consider the size of the panels and how they will affect your electricity usage. Many factors go into choosing the right size for you, but we’re here to help. We want to make sure that you have all of the information available before making such an important decision.
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Updated: 24 May 2024

This article outlines the various sizes of solar power systems in Australia and which may be the best solar panels for your home. Differently sized solar panels may be better suited for certain homes than others based on their location and energy needs. That’s why we recommend comparing different sizes and doing some research before making any decisions about what type of system would work best for your house or business.

Key facts

What size solar panel system do I need?

The size of a solar system someone should install at their property depends on the household’s annual electricity needs, whether battery storage will be added and where restrictions exist. The most popular sizes of solar systems installed in Australia are 5kW-7 kW. These can power your household during the day and cut down on expensive electricity bills, making them a great investment for homeowners who want quick returns on their investments. The more electricity a solar system generates, the fewer households need to rely on their local grid.

Tips for choosing the right solar power system size

There are multiple factors to consider when choosing the correct solar panel system size for your home. These factors include the space of your roof, the location you wish to set your solar panel system up in, the energy requirements your household needs, and your budget.

Compare solar panel systems

How much roof space do I need?

Solar panels typically come with standard dimensions of 1 meter by 0.7 meters (3’x2′), making them ideal candidates to be installed on homes. With lower power output, 250-360 watts per module compared against 400+ W. If you’re looking to go the solar route and have a 5kW system or higher, it is important that your roof can accommodate at least 24-30 250W panels. You’ll need about 25 square feet for every 1000 watts of power generated by these systems, which come out between 18 -34 meters squared.

Frequently Asked Questions and Answers

When considering the size and energy needs for a solar panel system, it is important to consider how many panels you will need. A typical 3×5 foot array can produce about 20% more than what one person requires daily – this means that 300 square feet (or 55 cubic meters)of space might be required if such an installation met all their needs.

With solar power continuing to grow in popularity, it is no surprise that the size of typical systems has increased as well. Systems now typically range from 6-kW upsized installations for those with batteries or 10+ kW models capable of storing energy when there’s plenty around but not needed immediately. A 6.6kW system can power a medium-sized home in Australia.

When it comes to solar power, larger is not always better. A 5kW kit will require about 400 square feet of space for installation and can produce an estimated 650-kilowatt hours (kWh) worth per month. This is ideal for small or medium-sized households that don’t use too much electricity. This size solar panel system can also be used as a backup generator.

There are a few factors you need to consider when choosing the ideal sized solar panel system for your home. You first need to look at how much energy and electricity you need to produce, how much space on your roof you have to install the system itself, your budget, and if you will want to extend your system in the future.

When designing your system, it’s important that you take into account the maximum output of each component. For example, suppose there is more than one inverter in use or different types (e.g., solar power plus battery storage). In that case, they should be able to provide enough energy for all components with varying needs – which means larger sizes! A good rule-of-thumb when installing systems outdoors: aim 10% bigger than what will fit onto the site; 30 degree+ climates require increased dimensions up to 33%.



Megan has extensive experience writing about health and life insurance in Australia. Megan has a special interest in health and wellness. She relies on her background in counselling psychology to convey the latest findings in a manner that is most beneficial to ComparingExperts readers. In every article she writes, Megan aims to uphold the standards of the Private Health Insurance Intermediaries Association (PHIAA) which ComparingExpert is part of.

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