PV panels are installed at permanent angles. The angle is usually predetermined so that there is an optimum solar radiation being received, by the panel, throughout the year. Efficiency can be increased by mounting the PV panels on a double axis, where two panels are mounted in such a way that they face away from each other, at an angle, as shown in figure 1 (Sampson 2009). This is opposed to a single axis mounting where the panel (or panels) is mounted on one side of the mounting structure as shown in figure Double fixed tilt mounting system is usually more expensive than single fixed tilt mounting system because double fixed tilt mounting structures require more materials than their single mounting counterparts do. However, double fixed tilt mounting system results to higher PV performance since the panels’ exposure to solar radiation is higher than in single fixed tilt mounting systems.
Azimuth (Sun Tracking) PV Mounting System
This mounting system aims at maximizing panel’s exposure to the sun, which results into an increase in power output. It is essentially a combination of the single and doubles axis fixed tilt mounting systems whereby an automatic adjustment system makes a single axis fixed tilt mounting system operate like a double axis mounted fixed tilt mounting system. The automatic adjustment system changes the panel’s angle with respect to the sun’s position, in the sky, and the PV array as shown in figure 3. There are two mounting arrangements under the azimuth mounting system: single axis and double axis tracking system. ...Show more