Journal
IEEE JOURNAL OF PHOTOVOLTAICS
Volume 9, Issue 1, Pages 245-251Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JPHOTOV.2018.2876934
Keywords
Crystalline-silicon (c-Si) solar cells; complex modulus; lightweight; reliability
Funding
- Swiss National Science Foundation through the National Research Programme Energy Turnaround [NRP 70]
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In several countries, building-integrated photovoltaics (PV) solutions could contribute to the growth of total installed PV capacity. However, in some circumstances, the relative high weight (10-15 kg/m(2)) and lack of aesthetics of PV may constitute a barrier to its diffusion. In this work, we propose a glass-free lightweight solution (approximate to 6 kg/m(2)) compliant with hail and mechanical load tests as prescribed by the IEC 61215-2:2016. The low weight is achieved by substituting the conventional glass cover with a polymer multi-layer resistant to hail impacts and the conventional polymer/glass backsheet by an innovative composite backsheet. A total of two module design contributions to impact resistance are highlighted: a global energy dissipation, mostly related to the backsheet properties; and a local energy dissipation, mainly related to the frontsheet properties. These results clearly show that a balance between frontsheet design and backsheet stiffness have to he found in order to maximize hail resistance and mechanical rigidity while minimizing the module's weight.
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