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Gonghe County, Qinghai Province of Northwest China, is located at an altitude of 3,150 meters, with an average annual temperature of only 3.1°C. The region is characterized by thin, dry air and sparse cloud cover, making it a typical plateau environment. Gonghe County benefits from abundant sunlight year-round, receiving 2,900+ hours of sunshine annually and an average solar radiation of 6,564.26 MJ/㎡, providing an ideal environment for photovoltaic power.
This time, we evaluated the performance of the HJT 630 W, TOPCon 610 W, and BC 650 W modules (of equal size) across key metrics, including low-light efficiency, incident angle (IAM), and temperature coefficient, focusing on their impact on BOS costs, energy generation hours, and IRR.
01: Lower BOS Costs
The Huasun HJT 630 W modules feature a lower open-circuit voltage and an optimized temperature coefficient, resulting in enhanced efficiency and stable performance. Additionally, each string can accommodate 26 Huasun 630 W modules, compared to only 24 modules for TOPCon 610 W and BC 650 W modules. For instance, in a heterojunction photovoltaic (PV) system with a DC capacity of 100.9 MW, the Huasun HJT 630 W modules contribute to superior system efficiency. This improvement helps reduce balance-of-system (BOS) costs by 0.376 USD cents per watt, ultimately enhancing the overall cost-effectiveness of solar project investments.
02: Higher IRR
The Huasun HJT module, offering an impressive bifaciality of 95+% and reduced linear degradation, outperforms the TOPCon 610 W by 0.24% in IRR and the BC 650 W by 0.10%. This leads to faster cost recovery and greater long-term returns, positioning the Huasun HJT 630 W module as the preferred solution for enhancing both energy performance and investment returns.
03: Sensitivity Analysis
For every 10% increase in module bifaciality, the IRR of HJT 630 W modules improves by as much as 0.02% compared to both BC 650 W and TOPCon 610 W modules. Under identical environmental conditions, enhanced bifaciality translates to greater overall value. The HJT cell's perfectly symmetrical design optimizes its bifacial performance, enabling it to significantly outperform competing technologies. Additionally, Huasun’s Himalaya G12 series ultra-high bifaciality modules, with an industry-leading bifaciality of 95%+, represent a new benchmark in solar technology innovation, particularly suited for vertical installations.
Moreover, increasing the mounting height by 0.5 meters results in an improvement in the IRR of HJT 630 W modules, with a gain of up to +0.04% compared to BC 650 W modules, and up to +0.05% compared to TOPCon 610 W modules. This highlights the added value of optimizing mounting height, further enhancing the performance and return on investment of HJT 630 W modules relative to competing technologies.
Under Plateau conditions, HJT solar power stations distinguish themselves with lower BOS costs, higher energy output, and superior returns in this ultimate competitive landscape. Looking to the future, Huasun is committed to advancing HJT technology and driving product innovation, broadening their applications across diverse environmental conditions, and making a significant contribution to a greener, low-carbon future.
03 Plateau – Please click here for the full version in PDF format.
02 C&I Roof – Click here to learn more about the C&I roof scenario
01 Desert - Click here to learn more about the desert scenario
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