Dust and other surface contamination can reduce solar generation throughout the lifetime of a PV system. Hi-MO X10 Guardian Anti-Dust combines HPBC 2.0 Back Contact technology with a patented frame design developed to reduce dust accumulation at the lower edge of the module and support higher long-term energy yield.
Dust, sand, pollen, pollution and other particles settle on the glass surface of PV modules and reduce the amount of sunlight reaching the solar cells. This effect, known as soiling, is one of the most important environmental factors affecting PV system yield.
The IEA PVPS estimates that soiling currently causes an average 4–7% loss in global PV energy production, with consequences for both electricity generation and operating costs.
The impact varies considerably between sites. Climate, rainfall, humidity, wind, module inclination, particle composition and the surrounding environment all influence how quickly modules become soiled and how easily deposits are removed.
€4–7 billion
projected annual global PV revenue losses from soiling in 2023
Source: Ilse et al., Joule, 2019
4–7%
estimated average global PV energy loss from soiling
Source: IEA PVPS, 2025
>1% per day
soiling losses can accumulate under severe site conditions
Source: Ilse et al., Joule, 2019
Hi-MO X10 Guardian Anti-Dust reduces persistent dust accumulation at the lower module edge, helping maintain power generation while reducing cleaning-related O&M.
Flush frame edgeHi-MO X10 Guardian Anti-Dust addresses a common point of persistent soiling: the lower edge of the module. Its patented frame design brings the short-side frame to the same height as the glass/lamination surface, allowing rainwater and loose particles to drain more easily from the module.
Energy yield
The flush short-side frame supports more effective runoff, allowing rainwater and loose particles to leave the module surface more easily. LONGi specifies a 2%+ power generation boost from the patented Anti-Dust frame design.
Lower edge on siteIn a CPVT-monitored field comparison, the Anti-Dust module achieved a maximum monthly power generation gain of 5.4% versus a conventional non-Anti-Dust reference module at a 10° installation angle.
5.4%
Maximum monthly power generation gain
10°
Installation angle
Yinchuan
China, Sep 2023 – Mar 2024
Source: LONGi / CPVT field test, Yinchuan, China. 10° installation angle, September 2023–March 2024.
Operations
Reduced dust accumulation can decrease cleaning needs and the associated labour, equipment and water requirements over the operating life of the system.
Independently certified by TÜV SÜD
LONGi modules covered by the Anti-Dust portfolio have undergone dust and sand testing according to IEC 60068-2-68 under defined laboratory conditions.
Test condition
TÜV SÜD test
Test method
IEC 60068-2-68, LC1 or LC2
Dust/sand composition
95% SiO₂
Concentration
5 g/m³
Air velocity
20 m/s
Exposure duration
4 hours per side
The TÜV SÜD certificates document testing against dust and sand exposure alongside IEC 61215 and IEC 61730 module qualification and safety standards.
View certificateTÜV SÜD
Dust and sand testing according to IEC 60068-2-68
Hi-MO X10 Guardian Anti-Dust combines its patented Anti-Dust frame with LONGi's HPBC 2.0 technology platform. The module brings together high-efficiency Back Contact cells, 0BB architecture, shading optimisation, TaiRay wafers and enhanced thermal performance to support energy yield and reliability across real operating conditions.
HPBC 2.0 uses a soft-breakdown design that allows current to bypass shaded areas through alternative paths. With one cell shaded, LONGi reports 70% lower power loss than TOPCon modules, while reducing localised temperature rise and hot-spot risk.
The 0BB structure removes front gridlines and rear busbars. Shorter electrical transmission paths reduce resistance losses, with LONGi reporting approximately 5 W additional module power from the architecture.
TaiRay wafers provide a stronger silicon substrate. The X10 uses wafers 10 μm thicker than the referenced conventional wafer, with LONGi reporting up to 16% higher rupture strength, supporting resistance to mechanical stress and microcracking.
A power temperature coefficient of −0.26%/°C, compared with −0.29%/°C for the TOPCon reference in LONGi's comparison, helps limit power loss as module temperature rises.
Up to 670 W
Maximum module power
Up to 24.8%
Module efficiency
−0.26%/°C
Power temperature coefficient
15 / 30 years
Product / power warranty
High efficiency designed for real operating conditions. Choose the Anti-Dust module format that fits your roof and string design.
Technical specifications and electrical characteristics
TÜV SÜD / IEC 60068-2-68
Installation and handling information
Anti-Dust technology is particularly relevant for low-tilt C&I rooftops and sites exposed to higher levels of dust, sand, agricultural particles or airborne pollution, where dirt can accumulate at the lower module edge and rainfall alone may not remove it effectively.
Low installation angles can limit natural removal of accumulated particles.
Soil, pollen and organic particles can contribute to module contamination.
Low rainfall and high airborne particle concentrations increase soiling exposure.
Traffic, construction and industrial activity can increase local particulate levels.
Our C&I experts can help you assess the application and select the right LONGi module for your project.
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