LONGi launches 25% efficiency HBC module for residential solar at Intersolar 2025

May 9, 2025
Facebook
Twitter
LinkedIn
Reddit
Email
LONGi's latest EcoLife series' module launch presented at Intersolar Europe in Munich, Germany
The new heterojunction back contact (HBC) module is expected to be available in August 2025 in Europe. Image: LONGi.

Chinese solar manufacturer LONGi has launched a new back contact (BC) module for its EcoLife series at the Intersolar Europe event in Munich, Germany.

LONGi was among the manufacturers that showcased their latest modules — including Canadian Solar and Aiko Solar — with the new module based on heterojunction (HJT) technology, and boasting a conversion efficiency of up to 25%.

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

Specifically designed for use in the residential solar sector, the bifacial modules, the first in the EcoLife series, includes 54 cells and a maximum power output of up to 510W.

This is the first time the technology has been implemented with BC technology in a commercialised module, according to the company, which expects the EcoLife series to be available in Europe this August.

The incorporation of HJT and BC technologies into an HJT cell combines HJT’s high-efficiency passivation with the design of BC’s multi-surface light absorption. By doing so, it achieves a full-surface passivation from all angles, reducing metal recombination loss to zero and enabling open-circuit voltage of over 750mV.

According to the Chinese solar manufacturer, the EcoLife series aims to combine high performance with enhanced safety, long-term reliability and a streamlined aesthetic suited for compact rooftop environments.

LONGi’s EcoLife series reaches a cell efficiency of 27.3%, while its modules’ output can increase rooftop installation capacity by up to 9%, according to the company.

Moreover, the EcoLife series features an ultra-low temperature coefficient of -0.24%/°C, which limits performance losses under high-temperature environments, while the first year degradation sits at 1% and the following years have an annual rate of 0.35%. It withstands snow loads up to four meters (6,000 Pa) and Category 15 hurricane winds (3,600 Pa) and holds a Class A fire safety rating.

This new module also uses the company’s proprietary TaiRay wafer, which increases its rupture resistance by 16% and reduces surface collapse under stress. This wafer is 10μm thicker than other wafers used in the industry.

Finally, the welding structure of the full back contact one-line reduces cell edge stress, thus improving the module’s anti-cracking performance, according to LONGi. The module also features bipolar passivation technology on its front, sides and back.

Read Next

Premium
October 24, 2025
Marcel Suri explores the datasets that will help improve the accuracy of PV output estimation and drive better performance.
October 23, 2025
The average price of a solar PPA signed in Europe in Q3 2025 fell below €35/MWh, reaching €34.25/MWh, according to LevelTen Energy.
October 23, 2025
Aviva Investors and Astatine have announced an €800 million (US$928 million) investment in renewable energy and decarbonisation solutions.
October 22, 2025
Ingeteam’s Mauro Rivola discusses the rapidly growing appetite for co-located solar and storage in Southern Europe.
Premium
October 21, 2025
PV Tech Premium spoke with academic and industry experts about the rising tide of cybersecurity concerns in Europe's solar energy sector.
October 14, 2025
German IPP wpd has started construction at its 140.6MW Marcy solar park in the Nièvre department of central France.

Subscribe to Newsletter

Upcoming Events

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
Solar Media Events
March 24, 2026
Lisbon, Portugal