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Distributed benefits: Large wafer modules in rooftop PV

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The transition to larger cell formats is well underway, with 182mm and 210mm products together representing almost 50% of the market last year. Discussion of the benefits, however, has often focused on large-scale solar projects. This has left many to wonder whether the space-constrained rooftop segment would also see the lower cost and higher energy yields promised by the new generation of PV modules. In this pv magazine Webinar, we take a closer look at how rooftop PV is managing the transition, and Longi Solar introduces its latest product for this segment, a 54-cell, 410 W module based on the 182mm wafer.


Distributed benefits: Large wafer modules in rooftop PV

The solar industry has quickly shifted to larger cells, with the 182mm format alone forecast to represent almost of half of the market this year. While the larger module based on these formats is already beginning to prove its worth in large-scale solar projects, these 500 W+ modules are widely seen as too large and unwieldy for use in rooftop projects.

While smaller sized wafers are beginning to disappear from the market, there is still healthy demand for rooftop-suitable modules. And even on a smaller surface area, the latest generation of module designs can still lead to better performance and a lower levelized cost of electricity. In this pv magazine Webinar, we take a look at how module manufacturers are integrating larger cell formats into modules small and light and enough for rooftop projects, and the advantages that can still be gained.

First, Winfried Wahl, Head of Product Marketing at Longi Solar, will take us through the company’s new module offering for the rooftop segment, a “little brother” for the 72-cell HiMo5 module, which Longi introduced last year and has already sold more than 10 GW. The smaller, 54-cell version is available in all black or standard white backsheet, and is designed for compatibility with inverters and mounting systems widely used in rooftop installations.

We will also be joined by Aymeric Barret, Technical Director at Skyray Engineering. With the benefit of years of experience working on rooftop PV systems, he will take us through some of the factors influencing system design when it comes to working with modules like Longi’s latest offering, and how energy yield can best be optimized.

pv magazine Webinar content

  • Market transition to large wafer formats
  • Module technology and the rooftop segment
  • Introduction to Longi’ HiMo5m series
  • BOS and mounting system compatibility
  • Influence on rooftop system design
  • Q&A

You can enter questions and comments in the comments window when registering or in the chat during the webinar. This webinar will be moderated by Mark Hutchins, editor at pv magazine.

Registration for this pv magazine webinar is free of charge.


Winfried Wahl | Head of Product Marketing, LONGi

Winfried Wahl is Head of Product Management and Chief Engineer at LONGi Solar Technologie GmbH, a leading dedicated mono-crystalline photovoltaic silicon, cell and module manufacturer. He has been working in solar and electronics industry for more than 20 years. Before joining LONGi in 2017, Winfried Wahl has been e.g. with Hanwha and Suntech in leading roles in Strategic Product Management and Marketing.

Aymeric Barret | Technical Director, Skyray Engineering

Aymeric is an experienced solar technical expert who has worked on GWs of projects across the lifecycle in 3 continents. Highlights include: • Preliminary design for ~1GW of projects, and design team for detailed design of 70MW (across 300 projects) • Project management for the construction of 10 rooftop and car port projects, with technical support to onsite PM for many others. • Technical support in operational phase including handover, ongoing technical support, repowering analysis & construction support


Mark Hutchins | Magazine Director, pv magazine

Mark Hutchins joined pv magazine as production editor for our monthly global title in September 2016. He also reports on upstream technology and markets, and new and emerging solar regions for both print and online. Mark has experience in copywriting, music journalism and the fast-paced world of startups.

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