When planning a solar system, understanding solar panel sizes and roof space requirements is essential. While solar panel dimensions have remained fairly consistent over time, the amount of power each panel can produce has increased significantly. This means many homeowners can now install larger systems using the same roof area as before. In this guide, Stag Electrical Solar and Refrigeration - Australia explains standard solar panel sizes, how much roof space is needed for common system sizes, and what factors affect how many panels will fit on your home anywhere in Australia.
Standard Solar Panel Sizes in Australia
Most residential solar panels installed on Australian homes measure approximately:
- 1.6 to 1.8 metres tall
- 1.0 to 1.1 metres wide
- Total area of around 1.6 to 1.9 square metres per panel
These panels typically weigh between 18 and 30 kilograms depending on the manufacturer and construction. Despite their similar physical size, modern panels now produce between 350 watts and 500 watts, which allows homeowners to generate more power without needing more roof space.
How Much Roof Space Do You Need for Solar?
A practical way to estimate roof space is to calculate how much area is needed per kilowatt of solar capacity.
As a guide:
- Systems using lower wattage panels may require around 5 square metres per kilowatt
- Systems using higher wattage panels may require closer to 4 to 4.5 square metres per kilowatt
Using these ranges:
- A 6.6 kilowatt system typically needs around 29 to 32 square metres of usable roof space
- A 10 kilowatt system usually requires between 40 and 50 square metres
These figures are estimates only and actual requirements vary based on roof layout, panel orientation, and installation standards.
How Many Panels Will You Need?
The number of panels depends on the wattage of each panel chosen.
Examples:
- A 6.6 kilowatt system using 370 watt panels will require approximately 18 panels
- A 10 kilowatt system using 420 watt panels will require approximately 24 panels
- Larger homes with electric vehicles or high energy use may install 15 kilowatt or larger systems, which typically require 30 to 35 panels
Higher wattage panels reduce the total number of panels needed and help maximise output on roofs with limited space. Use our solar panel calculator.
Why Roof Space Alone Is Not Enough
Even when a roof appears large enough, other factors determine how usable that space is:
- Roof orientation and tilt
- Shading from trees, neighbouring buildings, or chimneys
- Roof features such as skylights, vents, or split roof sections
- Required safety clearances and fire setbacks
For these reasons, Stag Electrical Solar and Refrigeration - Australia always prepares a site specific layout that shows exactly where panels will be installed and how they will perform throughout the year.
What Stag Electrical Solar and Refrigeration - Australia Checks Before Designing Your System
Every Stag Electrical Solar and Refrigeration - Australia quote includes:
- A measured assessment of usable roof space
- Shading analysis and orientation review
- Panel layout planning for optimal performance
- Clear explanation of how many panels will fit and why
- Realistic system performance and timeline ranges
This approach ensures you know exactly what to expect before installation begins.
Choosing the Right Panel for Your Roof
Homes with ample roof space may choose mid range panels that deliver strong value. Homes with limited roof area often benefit from higher efficiency panels that produce more power per square metre. Panel selection should also consider product warranties, expected degradation rates, and long term reliability.
All panels installed by Stag Electrical Solar and Refrigeration - Australia meet Australian standards and Clean Energy Council requirements.
Our Trusted Solar Panel Brands
To ensure consistent performance and long term reliability, Stag Electrical Solar and Refrigeration - Australia installs a carefully selected range of trusted solar panel brands. These manufacturers are chosen for their product quality, efficiency, warranty support, and proven performance in Australian conditions.
AIKO Solar Panels
AIKO panels are known for advanced cell technology and high efficiency, making them well suited to homes where roof space is limited and maximum output per square metre is important.
Jinko Solar Panels
Jinko is one of the world’s most established solar manufacturers, offering reliable performance, strong warranties, and a long track record in Australian residential and commercial installations.
Our team will recommend the most suitable panel brand based on your roof size, energy usage, and long term goals.
Solar System Trends Across Australia
Across Australia, average system sizes are increasing as households electrify appliances and add electric vehicles. Many homeowners are now moving beyond 6.6 kilowatt systems to 10 kilowatts or more. Designing a system that suits your roof today while allowing for future expansion is an important part of long term planning.
Get a Clear Answer for Your Roof
Stag Electrical Solar and Refrigeration - Australia services homes and businesses across Australia. If you want to know exactly how many solar panels will fit on your roof and how much energy they will produce, our team can provide a detailed layout and clear recommendations tailored to your property. Reach out today!
Book an assessment to receive a no obligation roof plan, system sizing advice, and a transparent installation timeline.
