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 and an average solar radiation of 6,564.26 MJ/㎡, providing an ideal environment for photovoltaic power.
Huasun has evaluated the performance of its HJT 630 W and 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 26 630 W modules, compared to only 24 for TOPCon 610 W and BC 650 W equivalents, which helps reduce balance-of-system (BOS) costs by 0.376 USD cents per watt, ultimately enhancing the overall cost-effectiveness of 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 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 the HJT 630 W modules improves by as much as 0.02% compared to both the BC 650 W and TOPCon 610 W. Under identical environmental conditions, enhanced bifaciality translates to greater overall value, with the HJT cell’s perfectly symmetrical design optimizing its bifacial performance, enabling it to significantly outperform competing technologies.
Moreover, increasing the mounting height by 0.5 meters results in an improvement in the IRR of the HJT modules, with a gain of up to +0.04%compared to the BC 650 W, and up to +0.05% compared to the TOPCon 610 W modules. This highlights the added value of optimizing mounting height, further enhancing the performance and return on investment of HJT modules relative to competing technologies.
Under Plateau conditions, therefore, HJT solar power stations distinguish themselves with lower BOS costs, higher energy output and superior returns in this ultimate competitive landscape.
