Tracking systems can be divided primarily according to the number of planes in which the photovoltaic modules move. Single-axis and dual-axis systems can thus be distinguished. The former, as the very name suggests, only rotate in one plane. In the morning, the modules are oriented towards the east, where they start their journey to further rotate towards the south during the day and head towards the west in the evening. The angle relative to the ground surface is not adjustable. Two-axis trackers allow movement in two planes. Not only do they rotate from east to west, but at the same time the angle of inclination of the panels relative to the earth surface is to be changed, thus further enhancing performance.
When differentiating between the types of tracking systems, the control system deserves some attention as well as since it can be based either on established mathematical models or on sensors. It is also possible to control the position of the tracking system by searching for the maximum power point and positioning the tracker in such a way that the PV modules achieve the greatest power.
- The CORAB TRACKER WS T-001 system can track solar radiation through the optimal positioning of modules. The whole system is fully automatic and maintenance-free. Among other things, the system is distinguished by slide-in installation, the possibility of using any PV modules, and the use of an advanced system of weather monitoring sensors. ‘All this is done to achieve maximum yield from the installation,’ says Paweł Wiktorowicz, Sales Support Manager at Corab.
The device offered by the Olsztyn manufacturer works well regardless of weather conditions. Be it gale, fog or heavy rain, tracker WS T-001 automatically switches into the most suitable and safe mode. Additionally it can use rainwater to wash the installed photovoltaic panels. It is worth stressing that the Corab offer includes bifacial modules of the Encor brand, which cooperate perfectly well with a tracker and achieving the desired effects from the operation of the tracking system.
‘We have developed a system characterized by an outstandingly small number of components, in result, it is failure-free and durable. Our R&D department has implemented solutions thanks to which the tracker adjusts the modules to the actual solar radiation,’ Paweł Wiktorowicz points out. As he adds, the WS T-001 model has been tested for operational safety, which is confirmed by CE and TUV safety certificates. Good resistance to corrosion of a tracker covered with a special Magnelis coating is also important.