Beyond Efficiency: HJT Technology Is Emerging as the Next Strategic Platform for Global Solar

The global photovoltaic (PV) industry is entering a new era—one where the focus extends beyond achieving higher module efficiencies. As solar power becomes one of the world’s fastest-growing energy sources, developers and investors are increasingly evaluating technologies based on long-term energy yield, reliability and levelized cost of electricity (LCOE).

Against this backdrop, heterojunction (HJT) technology is emerging as one of the industry’s most promising high-performance PV platforms. Continuous advances in manufacturing, improving cost competitiveness and growing commercial deployment are transforming HJT from a premium niche technology into an increasingly attractive solution for utility-scale and specialised solar projects worldwide.

From Efficiency to Lifetime Performance

HJT technology combines crystalline silicon with thin amorphous silicon layers, creating a cell structure that naturally reduces energy losses while delivering high conversion efficiency. More importantly, its benefits extend well beyond peak power output.

With bifaciality exceeding 95%, HJT modules can capture substantial reflected sunlight and increase energy generation from both sides of the module. An industry-leading temperature coefficient of -0.24%/°C helps maintain performance in hot climates, while excellent low-light response supports stronger electricity generation during mornings, evenings and cloudy conditions. Combined with lower long-term degradation, these characteristics contribute to higher lifetime energy yield and improved project economics.

As solar projects expand into deserts, mountainous regions, coastal areas and other challenging environments, these performance advantages are becoming increasingly valuable for developers looking to maximise returns over 25 to 30 years of operation.

These characteristics have also supported the growing deployment of HJT modules across offshore PV, floating solar, agrivoltaics and other specialised applications where long-term energy yield and environmental resilience are critical project considerations.

Manufacturing Innovation is Driving Wider Adoption

One of the biggest barriers to HJT adoption in its early years was manufacturing cost. Over the past few years, however, significant advances have reshaped the technology’s commercial outlook.

Manufacturers have introduced thinner silicon wafers, higher-throughput production equipment, reduced silver consumption, copper-based metallisation, multi-cut cell designs and zero-busbar (0BB) technologies. These innovations are steadily lowering production costs while improving manufacturing efficiency and scalability. Within this broader shift, Dinto Solar is among the companies that have independently developed HJT technologies for both silver-grid and copper-grid metallisation.

At the same time, module performance continues to improve. Industry roadmaps are targeting module outputs exceeding 800 W alongside further efficiency gains, while HJT’s compatibility with copper metallisation and future perovskite-silicon tandem architectures positions it as one of the industry’s most future-ready PV platforms. On 3 June 2026, an HJT industry manufacturer demonstrated a 1/3-cut HJT module with a TÜV Rheinland-certified output of 802.43 W and 25.83% full-area module efficiency, highlighting the rapid progress of industrial-scale HJT modules.

Rather than representing a standalone technology, HJT is increasingly viewed as a foundation for the next generation of ultra-high-efficiency solar cells. Recent progress in crystalline-silicon/perovskite tandem technology has also been significant, with an ESTI-certified 35.5% conversion efficiency reported for a tandem solar cell, demonstrating how tandem technology is progressing from laboratory research towards scalable industrial production.

Commercial Deployment Signals Market Confidence

Perhaps the strongest validation of HJT technology is its growing presence in commercial projects around the world.

China continues to lead HJT deployment through several large-scale installations. One of the most significant examples is the 4 GW Ruoqiang Solar Project in Xinjiang, recognised as one of the world’s largest single-site HJT developments. Built in a harsh desert environment characterised by high temperatures, intense solar irradiation and demanding operating conditions, the project demonstrates the technology’s suitability for utility-scale applications where long-term performance is critical.

Another notable example is the 600 MW Gurbantunggut Desert Project, which further demonstrates HJT technology’s suitability for utility-scale deployment in challenging desert environments. Industry estimates indicate that global HJT module applications are projected to reach approximately 30 GW, reflecting the technology’s accelerating commercial adoption across utility-scale and specialised solar applications.

Europe is also witnessing increasing adoption. Bulgaria’s Pazardzhik solar project has become one of the continent’s landmark HJT installations, highlighting the technology’s growing acceptance beyond Asian markets.

Beyond these flagship developments, HJT modules are being deployed across a wide variety of applications, including offshore PV, floating solar, agrivoltaics, vertical PV systems, distributed commercial installations and projects in mountainous regions. The diversity of these applications reflects the technology’s adaptability across different climates and operating conditions. Dinto Solar’s portfolio spans high-power utility, offshore and vertical PV modules, illustrating how manufacturers are tailoring HJT products for both mainstream and specialised project environments.

A Growing Global Manufacturing Ecosystem

HJT’s commercial momentum is being supported by an expanding global ecosystem spanning large-scale manufacturing, regional supply chains and technology innovation. China remains the leading hub for HJT industrialisation, with companies such as Tongwei Solar, Dinto Solar and Risen Energy advancing commercial-scale deployment. Supported by its dedicated R&D centre in Nanchang and manufacturing facilities in Longgang and Suining, Dinto Solar is developing a planned 15 GW HJT manufacturing capacity.

Beyond China, HJT adoption is gaining momentum across key solar markets. In Europe, REC Group has been an early pioneer in commercialising HJT modules, while Enel Green Power’s 3SUN Gigafactory in Italy is scaling up European HJT manufacturing with a planned 3 GW production capacity. India is also strengthening its high-efficiency PV supply chain, with companies such as Reliance New Energy exploring HJT manufacturing.

In North America, Canadian Solar is expanding domestic HJT production through its Jeffersonville, Indiana facility, with Phase I of 2.1 GWp entering production in July 2026 and a planned expansion bringing total US HJT cell capacity to 6.3 GWp. Emerging companies such as NuVision Solar are also contributing to the regional HJT ecosystem, while innovators such as Swift Solar are exploring perovskite-silicon tandem technologies based on HJT platforms.

Looking Ahead

As the solar industry increasingly prioritises lifetime energy generation over peak efficiency, HJT is steadily establishing itself as an important technology for next-generation photovoltaic systems. Its combination of bifaciality exceeding 95%, a temperature coefficient of -0.24%/°C, lower degradation and compatibility with future tandem-cell architectures makes it well suited to evolving project requirements.

With dozens of companies now participating across the HJT ecosystem, the entry of additional manufacturers and technology providers is expected to drive a broader wave of market growth. As global PV deployment continues to accelerate, HJT could expand from its current 30 GW-scale commercialisation stage towards more than 100 GW of cumulative global installations, supported by growing demand for higher-efficiency and higher-yield solar solutions.