Norway’s Over Easy says its pilot vertical solar PV system in Oslo achieved remarkable performance through a snowy winter. In 2022, the vertical system produced 1,070 kWh per installed kilowatt, which the company says compares to about 800 kWh per installed kilowatt for a conventional rooftop system.
“The annual specific yield is up to 30% higher than with traditional flat roof solutions.” managing director Trygve Mongstad told pv magazine.
In 2022, a vertical solar power system was born 1,070 kWh per installed kilowatt. Mongstad says this is comparable to approx 800 kWh per kilowatt installed in a conventional roof system installed in the same location.
“Two other installations with 5 kW HJT cells have also been operational in February and May 2022 in Oslo, Norway, and have demonstrated over 30% higher energy yield over time compared to traditional 10-degree-tilt flat-roof solar cells,” Mongstad added. “Snow is usually not a problem in terms of energy production, the panels stick to the roofs even with a meter of snow on the ground.”
Currently, the company uses PERC cells with 77-81 percent bifaciality or HJT cells with 90 percent bifaciality in its demonstrations.
“The ground cover rate of the installations is about 50%,” Mongstad explained. “The solar panels are about 20 cm high and the distance between the rows is 40 cm. The installations were placed on general dark or lighter gray bituminous roofing membranes.
The units include the mounting system and solar panels in one pre-assembled package, which makes them easy to install, according to the manufacturer. Each unit measures 1600 mm x 1510 mm x 350 mm and weight 24.5 kg. They also have an IP68 enclosure rating and 3.2mm double hardened glass.
Over Easy said he would cooperation with production partners in China and Spain and the goal is to start production of solar modules in the fall. CIt currently uses solar cells from undisclosed Asian manufacturers.
“We we do assembly at locations in Norway and Spain, and the units in our pilot installations are 100% manufactured in Europe, including the solar panels,” Mongstad said. pv magazine in May.