Sud Renovables has installed a pilot vertical rooftop PV system on one of its facilities in Barcelona, Spain. The array features two 500 W bifacial modules from US-based SunPower and two microinverters from Enphase Energy.
Spanish rooftop PV installer SUD Renovables has deployed vertical bifacial solar panels on the rooftop of its warehouse in Avinyó, Barcelona, Spain. The system features two 500 W P6 panels from US-based SunPower and two IQ8P microinverters from Enphase Energy.
“The mounting structures have been designed according to the wind characteristics of the area, with stainless steel material,” Sud Renovables Managing Partner Manel Romero told pv magazine.
The company deployed one of the panels with its front side face facing east, and the other facing west. Each one works independently, with maximum power point tracking (MPPT).
“With this configuration, we will experimentally see the behavior of the panel and the generation curve, which will be double if we consider the morning and afternoon peak, and the real value of specific production of the system,” explained Romero.
Sud Renovables acknowledged that it does not seem to make much sense to put vertical panels on a rooftop in low latitudes, but it plans to test them to validate their performance. It said it will consider vertical architectures in projects for which this configuration is appropriate, such as agrivoltaic systems, arrays on acoustic barriers along highways, fencing, or building facades.
“In Spain, it would make a lot of sense to install bifacial panels vertically on the ground and in urban environments with vertical applications,” said Romero.
He said that in these systems, the panel should be installed along the frame, without any objects casting shadows on the back, including metal profiles, wiring trays, microinverters, or optimizers.
However, the vertical placement of panels can expose modules to wind, which is why it is important that they are installed with the appropriate structures. This guarantees that the panels can withstand wind loads, so micro-ruptures of cells do not cause hotspots. SUD Renovables also suggested avoiding larger panels, and to use solar panels measuring approximately 2 square meters.
“The performance, or specific production, of the vertical panels is lower than with lower inclinations, but the drop in the price
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