During your research, you may have come across a solar system with tilts added underneath the panels. Are they necessary for your system and what is the ideal angle to tilt at?
What Does Tilting Do and What is the Best Angle to have a titled solar system?
The reason behind tilting solar panels is to further maximise the amount of solar energy captured. More sunlight exposure to the panels results in more power to your home or business.
The optimum angle to tilt depends on a few factors, including the location of the system, local weather, and which way the roof faces.
The Australian Standard for Solar Installation (AS5033-2014) advises that the ideal angle should be around 10º of the location latitude of the system. For example, the latitude of Melbourne is 37.8º, so the best tilt angle would be within 10º of that.
Sydney, Brisbane, Adelaide, and Perth would have an optimum panel angle of 33.9º, 27.5º, 34.9º, and 31.9º respectively.
An important thing to keep in mind is the weather in your area. If you live in a sunny spot such as Darwin or Queensland, the tilt angle won’t make much of a difference in summer months. Consider your tilting angle when winter rolls around and the sun is hiding away more often. A common rule is to increase tilt 15º from the latitude of the home in winter months.
What Happens if I Decide not to have a tilted solar system?
The most cost-effective system would be to have your panels lying flat on your roof. The output efficiency of this will differ from roof to roof. You may have a roof pitch that varies only slightly from the location latitude, in this case it wouldn’t really be necessary to add tilts. However, the position of your roof may have poor sunlight exposure and adding tilts may be necessary to combat this.
Generally, if your rooftop panels are sitting outside of their optimal range, you would lose around 1.5% efficiency.
If your rooftop is flat, electricity production decreases significantly more depending on location. For example, in Adelaide where the optimum angle is around 34.9º and your roof is flat, electricity production can decrease in efficiency at around 13%. But if you live in a lower latitude area like Darwin (12.5º), Panels lying flat on a roof won’t see a lot of reduction in efficiency at all.
So, What is the Perfect Tilt Angle For Me?
When deciding on whether to tilt or not, it can be difficult to know if it is necessary and at what angle. Is your roof already pitched at that perfect angle but facing in completely the wrong direction for maximum energy output? Maybe your area often has strong winds which may damage your tilted system?
There are multiple elements to think about, which can be overwhelming. Luckily, the friendly team at Solar Link Australia will guide you through this step and answer any questions you have regarding tilting as one of the many options to maximise your energy output.