Perth is located in the Southern Hemisphere, which means the best orientation for solar panels is north-facing. North-facing panels receive the most direct sunlight throughout the day, ensuring optimal energy production.
However, there are instances where homeowners may not have a suitable north-facing roof space. In such cases:
- East-facing panels can generate good energy output in the morning, making them ideal for households that consume more electricity early in the day.
- West-facing panels perform well in the afternoon, benefiting households that use more energy later in the day.
- South-facing panels are generally not recommended in Perth due to lower sunlight exposure, but in some circumstances, they may still provide value when combined with a battery storage system.
Optimal Angle for Solar Panels
The tilt angle of solar panels plays a significant role in maximising energy efficiency. In Perth, the recommended tilt angle for fixed solar panels is between 25 and 35 degrees. This angle allows the panels to capture the most sunlight throughout the year.
For households with flat roofs, panels can be mounted on tilt frames to achieve the ideal angle. Alternatively, some homeowners opt for lower-tilt panels to maintain a more aesthetically pleasing roofline.
Impact of Shading on Solar Panels
Shading from trees, nearby buildings, or other roof structures can significantly reduce solar panel performance. Even a small amount of shade on one panel can impact the overall system efficiency. To prevent this:
- Trim overhanging tree branches that may cast shadows on your panels.
- Position panels away from chimneys, antennas, or other obstructions.
- Use micro-inverters or optimisers to minimise shading effects on your system.
While fixed panels work well year-round, adjusting panel angles seasonally can further optimise energy generation:
- Summer: A lower tilt angle (around 15 degrees) can capture more direct sunlight.
- Winter: A steeper tilt angle (around 45 degrees) helps collect more solar energy when the sun is lower in the sky.
However, for most residential solar panel installations, a fixed tilt between 25-35 degrees is sufficient to provide high energy yields throughout the year.
Considerations for Battery Storage:
If you are considering adding a battery storage system, optimising solar panel placement becomes even more important. A mix of east, north, and west-facing panels can help ensure a more balanced energy production throughout the day, allowing the battery to charge efficiently and provide power when needed.
What this means:
By ensuring the right orientation, angle, and shading considerations, homeowners in Perth can maximise their solar energy efficiency. At SolArk Electrical, we specialise in designing and installing solar panel systems that suit your roof and energy needs. If you’re looking to install or upgrade your solar system, get in touch with our expert team today for a consultation!
For more expert solar advice, contact SolArk Electrical—your trusted local solar specialists in Perth.
