What is a solar tracker?

Ground mounted solar installations can use solar trackers to tilt the angle of solar panels throughout the day, maximising generation. They are typically used in large scale commercial or utility projects - not residential - as they come with added setup and maintenance costs, due to the additional moving equipment.

How does a solar tracking system work?

The orientation of the tracking system can either be controlled by a pre-programmed path based on astronomic predictions, or use solar radiation sensors to react to the current position of the sun. Sensors can become disorientated at dawn and in cloudy conditions, so a backup tracking system is necessary in the latter case.

Do solar tracking systems cost more than a fixed array?

All solar tracking systems will cost more money up front than a fixed array, due to the complexity of the technology. With moving parts, they come with added maintenance costs. It’s also worth noting that due to the weight of the equipment, they are too heavy for most roofs, so are only suitable for mounting on the ground.

How do dual axis solar trackers work?

A dual axis system can tilt in two directions. One of the axes works as above, to maximise generation through the day. The other is oriented east-west, allowing a tilt north through south to optimise output during seasonal variations in the sun’s angle relative to the system’s position on the globe. What is the uplift from solar trackers?

How much does a single axis tracker increase output?

Overall, you can achieve an average output increase of 20-25% with a single axis tracker. With a dual axis tracker, expected increase is another 5-10% on top of that, but this rarely justifies the added expense. All solar tracking systems will cost more money up front than a fixed array, due to the complexity of the technology.