Building A House With Solar Panels
Key Takeaways
- Solar power planning is required when building a new home.
- The efficiency of solar panel in Perth installations need to consider the shape of the block, shading, roof orientation and design.
- Government rebates and incentives for solar power change, so it is important to stay up-to-date on the latest information.
- Pre-installing wiring and laying solar panels can save time and money.
- Good communication between the builder, architect, and solar installation company is key.
- It is important to consider the following when installing solar panels. The size and location of the solar panels, the placement of the inverter and battery, and electric car chargers.
Things to consider when building
Block location and direction
Roof size and shape
- Roof orientation: North facing roofs are ideal for solar systems due to their ability to capture more sunlight. East and West-facing roofs can be used for solar power systems. However, they may need extra panels to capture enough energy.
- Roof space: The amount of roof space available will determine the amount of panels. Generally speaking, each square metre of roof provides 250-300 watts of electrical energy.
- Roof design: The angle and design of the roof should allow for support of the panels and not have too much shading reducing performance.
- Safety considerations: It is important to use scaffolding and harnesses, where appropriate. Therefore avoiding accidents or damage.
- Additionally, pre-wiring cables before walls are gyprocked helps ensure a neat and tidy install.

Batteries and EV chargers
Single or Three Phase
Pre wire and Panel plonk

Duration of build
Conclusion
Frequently Asked Questions
What is the maximum solar system size I can install on my new Perth home?
With single-phase electricity supply, the largest allowed solar on a home is 6.6kW, although extra solar can be installed when a battery is present. If you want a larger system, you will need three-phase electricity supply instead. Three-phase also offers higher efficiency and faster electric car charging.
Why does roof direction matter for solar panels in Perth?
North-facing roofs are ideal for optimal energy production because they capture more sunlight. East and west-facing roofs can work too, but they may need extra panels to capture enough energy. The roof should face an angle that allows for optimal efficiency with minimal shading.
How much electrical energy can I get from my roof space?
Generally speaking, each square metre of roof provides 250-300 watts of electrical energy. The amount of roof space available will determine how many panels you can install.
When should I get quotes for solar installation on my new home?
It is recommended that homeowners get firm quotes during the design process, or at least 3-4 months before handover. This timing is important because government rebates change each year, so it helps with pricing the job correctly.
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