en.Wedoany.com Reported - Vertical solar specialist Over Easy Solar has deployed its first roof-mounted vertical solar installation on a building in the Willets Point industrial area of Queens, New York City, USA. The system, integrated with the building's green roof, was delivered by Over Easy Solar's partner Sempergreen USA, the largest producer and supplier of pre-grown vegetation mats for green roofs in North America.
The 100 kW vertical array utilizes Over Easy Solar's xM3 VPV units, a prefabricated vertical bifacial system designed for flat roofs. It uses Huasun's heterojunction technology (HJT) solar cells, rated at 256 W per unit with a bifaciality of 95-96%, and requires no ballast or roof penetration for installation. Dick Bernauer, Vice President of Sales at Sempergreen USA, said: "Due to its unique wind uplift resistance, this ultra-lightweight system (2.4 lbs/sq ft) can be combined with a green roof without requiring additional ballast. It's an excellent solution for flat roofs with lower load-bearing capacity."
Trygve Mongstad, Founder and CEO of Over Easy Solar, told pv magazine that the vertical system allows complete coverage of the vegetation surface by rain and sunlight, maintaining rainwater retention and plant health, which is difficult to achieve with traditional ballasted systems. He added that the project was initially planned with a traditional tilted PV layout but was changed to a vertical configuration to meet the New York City Department of Environmental Protection's requirements for green roof performance.
Mongstad also noted that vertical bifacial solar installations have similar energy yield per unit as traditional installations. He explained: "In New York, a 100 kWp vertical solar panel installation can produce 100,000 to 140,000 kWh annually, depending on factors like albedo, orientation, and local shading. Using the same irradiance data, a traditional east-west flat roof solar installation (10-degree tilt) would produce about 116,000 kWh per year." In terms of specific yield, vertical solar installations produce 1,000 to 1,400 kWh/kWp per year, while traditional systems produce about 1,300 kWh/kWp.
Over Easy Solar has begun developing an energy yield portal allowing users to explore the impact of albedo, orientation, and location on vertical bifacial solar systems. The company has added data for New York, as well as Berlin, Madrid, Oslo, and Tromsø. Last September, the company deployed a 320 kW system in Tromsø, breaking its own record for the world's largest roof-mounted vertical solar array. Earlier this year, a case study found that vertical roof-mounted solar panels could produce up to 30% more energy than traditional systems during snowy months. In January, Sydney-based Smart Commercial Energy announced a partnership with Over Easy Solar to introduce vertical roof-mounted solar systems to the Australian market.
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