The 7.6 MW system, covering around 30,000 square metres of rooftop area, was connected to the grid in October 2025. Developed and constructed by Solcellespesialisten, the project comprises approximately 12,000 Longi Hi-MO X10 modules and is expected to produce around 6.8 GWh annually. The system is projected to generate more electricity than the facility consumes each year, with roughly 60 to 70 percent of total output exported to the grid.
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Each module delivers up to 670 W, with a module efficiency of 24.8 percent and a cell efficiency of 26.6 percent. The technology is based on Longi’s HPBC 2.0 (Hybrid Passivated Back Contact) platform, combining a zero-busbar design, TaiRay n-type wafer and multi-layer passivation to enhance light absorption and reliability. The Hi-MO X10 offers first-year degradation of around one percent, an annual linear degradation rate of 0.35 percent and a temperature coefficient of -0.26 percent per °C, supporting higher energy yield and durability. Enhanced mechanical strength, including a 16 percent increase in wafer break resistance, along with lower shading and hotspot losses, makes it well suited for commercial rooftops in Nordic climates, where variable light and heavy snow and wind loads demand robust performance.
Rooftop potential in Norway up to 31 GW
The Ahlsell Norge AS warehouse in Deli Forest, Eidsvoll, was completed in 2025 and is one of Norway’s largest and most technically advanced logistics properties. The facility covers 64,000 square metres and sets a benchmark for large, centralised logistics operations in Norway. Located north of Gardermoen, it combines state-of-the-art automation with high-tech infrastructure, including a 36-metre-high automated warehouse and a large rooftop solar installation.
Norway’s solar industry is entering a new phase of expansion. After adding nearly 150 MW of new capacity in 2024, total installations exceeded 750 MW nationwide in 2025, with commercial and industrial rooftops driving much of the growth. Studies published in 2024 estimate that Norway’s rooftops could technically accommodate up to 31 GW, representing potential generation of around 30 TWh per year. The government aims to reach 8 TWh of solar electricity by 2030, with rooftop systems expected to contribute a substantial share.
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Against this backdrop, the Ahlsell installation demonstrates how large-scale rooftop solar can support national renewable targets while reducing emissions and strengthening energy resilience. Pareto Alternative Investments acted as the project investor, and the system incorporates Solis inverters and Van der Valk mounting structures to support long-term reliability and structural stability. (hcn)
