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We all know the value of harnessing the sun’s power for your home or business in South Africa. However, many don’t know how much energy you can harness from the sun by correctly positioning your solar panels.
While we are blessed with endless sunshine compared to nations in Europe, we all could use more power from our solar panels.
Here’s a simple guide to help you understand how to position your solar panels to harvest the most from the sun.
Understanding the Sun’s Path
The sun’s path will differ depending on which hemisphere you’re located in, southern or northern.
In the Northern Hemisphere, solar panels should be positioned and angled towards a southerly direction, but we’re in the Southern Hemisphere, so our panels need to face northwards.
This is because, in the Southern Hemisphere, the sun is mostly in the northern part of the sky throughout the day. Thus, a northern-facing panel receives the most sunlight.
Make sure that your panels face true north, which isn’t magnetic north. Based on your geographic location, you will need to use a GPS to determine the real direction of true north.
Also, when installing your panels, ensure no obstructions, such as a tree or large building, are in the sun’s path.
As you know, the sun moves from the east to the west during the day, and shadows cast by obstructions will significantly reduce panel efficiency.
Optimal Tilt Angle
When you’ve determined the best position for your solar panels, it’s time to consider their tilt angle. The tilt angle of your solar panels is equally important as their orientation.
The best angle for your solar panel depends on your property’s latitude. The correct tilt will help your panels capture the maximum sunlight year-round.
To calculate the best tilt angle for your solar panels, you should equal your property’s latitude.
For example, if you live in Johannesburg, your home will be 26 degrees south, so the optimal angle for your panels is approximately 26 degrees.
You can also fine-tune this tilt angle with seasonal changes. Reduce the summer’s angle by 10-15 degrees while doing the opposite for winter, increasing the tilt by 10-15 degrees.
By adjusting for the seasons, you can improve the overall performance of your panels.
Fixed vs. Adjustable Mounts
You can choose from two types of solar panel mounts: fixed or adjustable. Both have pros and cons.
Fixed Mounts:
As their name suggests, fixed mounts are mounted into place and set at a specific angle and orientation. When using fixed mounts, you want to calculate the best average performance across the year.
While they are easier to install and maintain, a major disadvantage is that you can’t easily adjust them to capture the maximum potential energy during specific seasons.
They are also more affordable compared to their counterparts.
Adjustable Mounts:
As you can imagine, adjustable mounts allow you to change the tilt of your panels according to the season, improving efficiency during peak months.
Although more costly, adjustable mounts are ideal for maximising solar production throughout the year. Also, although they are easy to adjust, climbing on and off a roof can be dangerous.
Local Climate Considerations
Local climate plays a vital role in panel performance. Panels will naturally perform well in regions with lots of sunshine, such as South Africa.
This being said, there are elements to be aware of.
In hot climates, solar panel performance can decline if the temperatures get too high. When installing your solar panels, make sure that there is enough airflow flowing over them to regulate temperatures.
If you are in an area locally where you receive frequent rain or occasional snow, consider slightly steeper tilt angles to allow the water or snow to run off. Also, this steeper angle will help keep your panels clean.
Maximising Efficiency: Regular Maintenance
Even if your solar panels are perfectly aligned, they will lose some efficiency if not maintained properly.
Performing a regular cleaning routine and inspection will ensure that your system continues to perform at its best.
Solar panel maintenance is easy. It means cleaning the panels’ surface at least twice a year or more frequently if you live in a dusty or coastal area.
When cleaning your panels, make sure to visually check the mounting system for any signs of damage or corrosion.
When In Doubt, Call Someone To Help
Ensuring your solar panels are correctly aligned is essential if you want their best performance.
By following our tips, you will be on the right path to capture more sunlight and generate more electricity throughout the year.
But if you’re concerned about performing any of these tasks independently, contact us for advice.