Alpine PV Competence
A project to support implementation partners by the Swiss universities of applied sciences
Latest Knowledge Articles
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Irradiation at high altitudes for alpine photovoltaic systems
The irradiation power of alpine photovoltaic (PV) systems can be very high for short periods, unlike in the midlands. Values of up to 2400 W/m2 for instantaneous values are reported. This is mainly due to pressure-induced thin atmosphere as well as high ground reflections in the snow due to strong module inclination lead to significantly…
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Insights from the first construction season
According to the initial regulations of the “Solarexpress”, 10 % of the planned PV-installation must be connected to the grid by the end of this year (2025)1. Therefore, the constructions had to begin this summer. So far, 4 sites are under construction and partially connected to the grid: Based on these sites, first experiences were…
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Hail Damages
Although hail events are relatively infrequent, they pose a significant risk when they occur, as they can directly impact the mechanical stability of PV modules, including the glass and solar cells. The likelihood and severity of hail damage depend on location, with Alpine foothills identified as higher-risk areas (see Alpine PV Stressors). Hailstones can vary…
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Low-Temperature and Thermal-Cycling-Induced Damages
Photovoltaic modules installed in cold climates or at high altitudes are exposed to extreme mechanical and thermo-mechanical stresses. Low temperatures and rapid temperature fluctuations influence solar cells, polymeric materials – encapsulant and backsheet – and also electrical interconnections, cable insulation, and connectors. While low ambient temperatures generally slow chemical ageing processes [1], they significantly increase…
