Factors to Consider for Optimal System Performance
Correct solar panel installation is crucial to installing an effective solar power system and ensuring maximum sunlight exposure. The panels should be positioned to capture as much sunlight as possible based on location and orientation. Here are some factors to consider for optimal solar panel installation in Australia.
Hire a Fully Licensed Electrician with CEC Solar PV Accreditation
It is essential to entrust the installation of solar panels to a fully licensed electrician with Solar PV Accreditation from the Clean Energy Council. This accreditation is vital to ensure that the installer has the necessary skills, knowledge, and experience to safely and effectively install solar panels. Proper installation of solar panels is essential for the long-term performance of your solar power system. Even if the components chosen for the system are the best on the market, the system will not provide maximum output if not installed correctly.
Location Factors to Consider for Solar Panel Installation
Sunlight availability, panel orientation, panel shading, climate, and location-specific factors are some critical aspects to consider when evaluating a site for solar panel installation.
Sunlight Availability
Solar panels need direct sunlight to produce electricity, so ensuring that the installation location receives ample sunlight is crucial. The best way to determine this is to take several visual inspections throughout the day, noting any obstructions that could affect sunlight availability.
Panel Orientation
The angle and direction of your solar panels can significantly impact their energy output. In Australia, solar panels should face north and have an inclination of 30-45 degrees to maximise efficiency.
Panel Shading
Obstructions such as trees, buildings, or other objects that cast shadows on your solar panels can reduce energy output. Be sure to evaluate your site for shading, especially during peak sunlight hours.
Climate
Climate conditions can affect solar panel performance. In areas with extreme temperatures, high winds, or heavy snowfall, you may need to take additional precautions to ensure the longevity and efficiency of your solar panels.
Location-Specific Factors
Some locations may have specific regulations or requirements for solar panel installations. Your local solar installer should know this well and comply with local laws and guidelines.
Optimal Solar Panel Mounting Angle
Choosing the correct mounting angle for solar panels is essential for optimising their energy output. Here are some factors to keep in mind:
Direction
In the southern hemisphere, the optimal direction for solar panels to face is north. If your roof faces NW or NE, you can still generate a good amount of power, with only a negligible power loss of around -2.9% to -4.1%. However, if your roof faces in a westerly or easterly direction, the power loss could be anywhere from -14.9% to -21%. If you have a south-facing roof, your installer may be able to compensate with mounting frames to flatten the panel angle out.
Latitude
The best angle for a solar panel to face the sun is 90°, but this is not always possible with a fixed panel mounting. The best solar panel angle is calculated based on your latitude, representing the sun's perspective halfway between the middle of winter and the middle of summer. The latitude of your city will give you the best all-year-round sunlight.
| City | Angle |
|---|---|
| Sydney | 33.8° |
| Canberra | 35.3° |
| Melbourne | 37.8° |
| Hobart | 42.8° |
| Adelaide | 34.9° |
| Perth | 31.9° |
| Broome | 17.9° |
| Darwin | 12.4° |
| Cairns | 16.9° |
| Brisbane | 27.4° |
Time of Day
Solar panels produce the most energy between 9 am and 3 pm. Therefore, the angle of your solar panels should be optimised for the middle of the day, when the sun is at its highest point in the sky.
Conclusion
Proper installation of solar panels is essential for the long-term performance of your solar power system. Considering the abovementioned factors, you can ensure that your solar power system delivers optimal performance and meets your energy needs. Remember to hire a fully licensed electrician with Solar PV Accreditation to install your solar panels safely and effectively.
