Komax Solar offers new stringer for 6-inch back contact solar cells

September 3, 2012
Facebook
Twitter
LinkedIn
Reddit
Email

Komax Solar has developed a new, fully automatic stringer for 6-inch back contact cells. The contactless soldering technology as well as the ribbon handling technology was designed to minimize the thermo mechanical stress introduced into the solar cell. In addition, this back contact stringer adds the electrical isolation between the cells and the ribbons.

Problem

Typically, 5-inch back contact cells are contacted at the edges and interconnected with tabs. However 6-inch back contact cells (MWT, EWT as well as IBC) need to be connected over the whole area in order to minimize resistive losses. One possibility is to use a foil based approach (like a flexible PCB), but this solution is expensive in terms of material cost and CapEx. A ribbon based approach is a cost efficient solution in terms of material cost as well as CapEx, but the thermo mechanical stress introduced into the solar cell must be minimized and the electrical isolation needs to be established.

This article requires Premium SubscriptionBasic (FREE) Subscription

Try Premium for just $1

  • Full premium access for the first month at only $1
  • Converts to an annual rate after 30 days unless cancelled
  • Cancel anytime during the trial period

Premium Benefits

  • Expert industry analysis and interviews
  • Digital access to PV Tech Power journal
  • Exclusive event discounts

Or get the full Premium subscription right away

Or continue reading this article for free

Solution

Komax Solar has developed a low stress cell interconnection technology for back contact cells by further optimizing their contactless soldering technology, in combination with a special treatment of the ribbon which minimizes the thermo mechanical stress introduced into the cell. In addition, the back contact stringer from Komax adds the electrical isolation between the ribbons and the cell. For high aesthetic values, the electrical isolation material is available transparent or white or black colored. The newly developed interconnection technology takes care of environmental aspects, since it also works with lead free solder.

Applications

Ribbon based interconnection of 5 and 6-inch MWT, EWT and IBC solar cells.

Platform

The new back contact stringer is based on back contact technology from Komax Solar with more than 1GW of back contact stringers (Xcell 3000 platform) installed in the market. The new back contact stringer uses the same key technologies (closed loop induction soldering, ribbon handling and handling of the isolating materials) as the Xcell 3000.

Availability

Currently available.

Read Next

October 31, 2025
Australia's solar and energy storage sectors delivered transformative performance during the third quarter of 2025, with grid-scale solar generation reaching 1,699MW average output while battery systems expanded capacity by 2,936MW since Q3 2024.
October 31, 2025
Acen Australia has committed to recycling around one million solar modules from its 400MW Stubbo solar PV power plant in New South Wales.
October 30, 2025
Scatec posted development and construction (D&C) revenues of NOK1,760 million (US$175.1 million) in the third quarter of this year.
October 30, 2025
Global net zero by 2050 is now “impossible” and the world is on course for temperature rises of 2.6°C, according to energy market analyst Wood Mackenzie.
October 30, 2025
US microinverter producer Enphase Energy posted increased revenues, margin and income in Q3 2025, as it doubles down on its US manufacturing operations.
October 30, 2025
Nexamp has secured US$600 million in financing for distributed solar and energy storage projects in the US.

Subscribe to Newsletter

Upcoming Events

Upcoming Webinars
November 12, 2025
10am PST / 1pm EST
Solar Media Events
November 25, 2025
Warsaw, Poland
Solar Media Events
December 2, 2025
Málaga, Spain
Solar Media Events
February 3, 2026
London, UK
Solar Media Events
March 10, 2026
Frankfurt, Germany