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State-of-the-art bifacial module technology

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By Dr. Hartmut Nussbaumer; Dr. Markus Klenk; Andreas Halm; Prof. Dr. Andreas Schneider

Bifacial PV promises a significant reduction in the levelized cost of electricity (LCOE) for PV systems, which, compared with efficiency improvements at the cell level, is still achievable with comparatively moderate effort. Almost all major PV module suppliers have bifacial modules in their product portfolios or have announced production. This paper gives an overview of the currently available bifacial modules and cell technologies and the performance of these modules. Special attention is given to the cells and the layout of the modules, including light trapping and interconnection technologies, the encapsulation materials and the adapted mounting solutions. Finally, an outlook is given on the basis of the compiled information.

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Welcome to Photovoltaics International 41. An emerging theme in the industry further downstream is the growing variety of bankable PV modules. It’s a topic we’ll be picking up on 23-24 October at our PV ModuleTech conference in Penang, Malaysia. This issue of PVI captures the ongoing work to drive improvements across the full range of those technologies. From the exploration of next generation CIGs cells to the commercial improvements of PERC by Trina Solar, this edition neatly captures that variety. Fraunhofer ISE reviews the latest results from efforts to improve the texturing of diamond wire sawn wafers. Trina Solar presents a roadmap for PERC improvements that it claims could halve costs while pushing efficiencies to 24% in around seven years. ECN and imec explore the latest developments in integrated cell to module manufacturing approaches from the more familiar multi-busbar and multi-wire to shingling and woven fabric and foil-based module technologies for back contacted cells. Elsewhere, CSEM INES zooms in on a major limiting factor for silicon heterojunction cells, metallization. All the regular features including our news reviews and R&D spending report make a return, plus lots more. Following on from this bumper edition, PVI42 will be published in Spring 2019.

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