Project: Adapted Modules for Bifacial Photovoltaics

Acronym AmBi PV (Reference Number: JTC-2_2019_078)
Duration 01/10/2019 - 30/09/2022
Project Topic The project Ambi PV focuses on new interconnection approaches for bifacial solar cells. The higher current in bifacial modules causes increased ohmic power losses which can be addressed by advanced interconnection techniques such as wired interconnection, shingling, 1/2 cells or combined approaches. The following interconnection technologies are investigated, including related optimizations of the cell/module materials and lay-outs: • A new wire-based concept for the interconnection of bifacial IBC (Interdigitated Back Contact) cells • Two shingling interconnection approaches for PERX cells, based on electrically conductive adhesives (ECA) and seamless soldering. Each of these approaches has specific challenges which are not only related to the interconnection process but also to the respective module and cell design. So, the mechanical stress due to e.g. bending of the laminate will affect the interconnection of shingled cells in a different way than wire connected ones. The tensile or compressive stress on an ECA glued interconnection will be different if the cell matrix is embedded along the neutral fiber in a glass/glass- or in a glass/backsheet- module. Particularly the thermomechanical properties and the thickness of the embedding material and rear layer have to be adapted to the specific conditions as well as the cell layout. The innovative techniques are compared to standard approaches to reveal their advantages and drawbacks. This allows a benchmarking with regard to module efficiencies, their reliability and related cost. The results will provide a sound basis for further decisions and deliver material for dissemination and publication.
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Network Solar Cofund 2
Call Solar Cofund 2 Joint Call

Project partner

Number Name Role Country
1 Polymer Competence Center Leoben GmbH Smart Material and Surface Testing Coordinator Austria
2 ZHAW - Zurich University of Applied Science IEFE - Institute of Energy Systems and Fluid Engineering Partner Switzerland
3 International Solar Energy Reserach Center Konstanz Module Partner Germany
4 Westfälische Hochschule Elektrotechnik und angewandte Naturwissenschaften Partner Germany
5 SolAround Ltd. R&D Partner Israel