In the rapidly evolving solar industry, maximizing energy production from every installed panel is crucial for project success. Single axis solar trackers have emerged as a powerful solution, significantly outperforming traditional fixed mounting systems by continuously aligning photovoltaic (PV) panels with the sun's movement throughout the day.

This article explores the technology behind single axis tracking systems, their benefits, applications, and what to consider when implementing them in your solar project.

What Are Single Axis Solar Trackers?

Single axis solar trackers are mounting systems that enable solar panels to follow the sun's path across the sky, rotating around a single axis. Unlike fixed-tilt systems that remain stationary at a predetermined angle, these trackers adjust their position throughout the day to maintain optimal alignment with the sun's rays.

There are two primary types of single axis trackers:

• Horizontal Single Axis Trackers (HSAT): The axis of rotation is horizontal to the ground, typically aligned along the north-south direction. These are particularly effective in low-latitude locations where the sun's path is high in the sky.

• Tilted Single Axis Trackers (TSAT): The rotational axis is tilted at an angle corresponding to the site's latitude, optimizing performance across different seasonal sun angles.

Key Benefits of Single Axis Tracking Systems

Enhanced Energy Production

The primary advantage of single axis trackers is their ability to boost energy output significantly. According to industry data, these systems can increase electricity generation by 15-35% annually compared to fixed-tilt systems . This enhanced performance comes from the tracker's ability to maintain a more direct angle to the sun throughout the day, capturing more sunlight during early morning and late afternoon hours when fixed systems perform poorly.

Improved Land Utilization

By producing more energy from the same number of panels, single axis trackers offer better land utilization. Projects can generate the same amount of power with fewer panels, or maximize output from limited space. This is particularly valuable in areas where available land is constrained or expensive.

Cost-Effectiveness

While single axis trackers involve higher initial investment than fixed mounting systems—typically around $0.18-$0.25 per watt compared to $0.08-$0.12 for fixed systems —the increased energy production often justifies the additional expense. The return on investment is especially favorable in regions with high electricity rates and good solar resources.