The global PV market is evolving toward value-driven applications that prioritize maximizing power generation rather than merely minimizing LCOE. For example, electricity demand is increasing during peak load hours, such as at dusk and dawn, rather than the traditional midday peak. Correspondingly, east-west installation orientations are gaining popularity, replacing the long-standing preference for south-facing arrays.
In response to this shift, Huasun Energy, a pioneer in HJT (heterojunction) technology, launched its Kunlun series ultra-high bifaciality modules at the start of 2025. These modules are specifically optimized for vertical installations, including Agrivoltaics, transportation corridors, building-integrated applications, and more. The company has also recently released several case studies highlighting vertical PV deployments featuring the Kunlun series.
The Product
The Kunlun HSN-210-B132 series HJT module features 132 G12 half-cells and delivers a maximum power output of up to 720 W with an efficiency of 23.2%. Powered by HJT 3.0 cell technology, the module incorporates zero-busbar (0BB) metallization architecture and offers superior low-light performance compared to conventional technologies. According to Huasun, this results in high dual-peak power generation throughout the day.
One of the standout features of the Kunlun module is its exceptionally high bifaciality of 95% (±5%), attributed in large part to the symmetrical nature of HJT cell design. The module measures 2,384 × 1,303 × 30 mm and features 2 mm-thick glass on both the front and rear, housed within alloy steel frames, making it capable of withstanding a static load of up to 2,400 Pa in vertical mounting configurations.
To ensure reliable, long-term performance in space-constrained or demanding environments, the glass-glass module is constructed with an EVA encapsulant, a light-conversion film, and a butyl adhesive.
Demonstrating Performance
To validate the product's field performance, in particular its up-to-100% bifaciality, Huasun presented 2 Agrivoltaics case studies: a 98.6 MW AC installation in Blankenfelde, Germany, and a 5.2 MW vertical PV project by Next2Sun in Merzig-Wellingen, Germany.
In the Blankenfelde project, vertical installations using 720 W Kunlun modules outperformed TOPCon counterparts, increasing power generation hours by up to 7.91%. This resulted in an 8.72% lower LCOE and a 3.76% higher IRR, according to Huasun. Additionally, the vertical configuration reduced land use by up to 10 hectares, leading to a 1.92% reduction in balance of system (BOS) costs.
For the Merzig-Wellingen project, the project manager from Next2Sun noted: “Huasun HJT modules boost performance by reducing snow and dust impact while capturing reflected sunlight, exceeding our power generation expectations by 12%." He added, “Their bifacial symmetrical design enhances solar absorption, improving vertical PV efficiency while minimizing light pollution, noise, and land disruption for seamless, low-impact integration.”
