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High-latitude tests show vertical rooftop PV yields 30% more energy in winter – pv magazine International


Norway’s Over Straightforward says its pilot vertical PV system in Oslo achieved excellent efficiency all through the winter season. By 2022, the vertical array has generated 1,070 kWh per kilowatt put in, which the corporate says compares to round 800 kWh per kilowatt put in for a standard rooftop array.

Norwegian startup Over Straightforward experiences preliminary outcomes of its vertical bifacial rooftop PV system, which makes use of specifically designed photo voltaic modules. The Norwegian Institute for Power Know-how (IFE) helps the corporate in measuring the efficiency of the array, which is positioned in Vestby, close to Oslo.

“The overall annual particular yield is as much as 30% greater than typical flat roof options,” CEO Customs of Trygve Mongstad pv journal.

In 2022, the vertical PV system is created 1,070 kWh per kilowatt put in. Mongstad says it compares to the surroundings 800 kWh per kilowatt put in for a standard rooftop array put in in the identical location.

“Two extra 5 kW installations with HJT cells have additionally been working since February and Might 2022 in Oslo, Norway, and have proven greater than 30% greater vitality yield in these durations in contrast in typical 10-degree tilted flat roof photo voltaic installations,” Mongstad added. “Snow is mostly not an issue for vitality manufacturing, the panels keep on the roofs even with 1 m of snow on the bottom.”

The corporate at the moment makes use of PERC cells with a bifaciality of 77% to 81% or HJT cells with a bifaciality of 90% in its demonstrators.

“The bottom cowl ratio of the installations is about 50%,” Mongstad defined. “The photo voltaic panels are about 20 cm excessive and the pitch between the rows is 40 cm. The installations are positioned on generic darkish or lighter grey bitumen roofing membranes.”

The models embody a mounting system and photo voltaic panel in a pre-assembled bundle, which the producer says is straightforward to mount. Every unit measures 1,600 mm x 1,510 mm x 350 mm and weighs 24.5 kg. In addition they function an IP68 enclosure ranking and are 3.2 mm double-tempered glass.

Over Straightforward mentioned its plan is working with manufacturing companions in China and Spain and intends to start manufacturing photo voltaic modules within the fall. cat the moment, it makes use of photo voltaic cells provided by undisclosed producers in Asia.

we assembles at places in Norway and Spain, and the models for our pilot installations have to this point been 100% made in Europe, together with the photo voltaic panels,” Mongstad mentioned. pv journal in Might.

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