The LONGi Hi-MO X10 is a new generation of high-efficiency solar modules designed for residential rooftops, commercial and industrial buildings, and distributed photovoltaic projects. Its core technology is HPBC 2.0 Hybrid Passivated Back Contact cell technology, combined with N-type TaiRay silicon wafers and a 0BB busbar-free design.

The series focuses on delivering higher power per square metre, better low-light performance, improved output in hot weather, enhanced safety, and a cleaner appearance. In the European market, the Hi-MO X10 family mainly includes the Explorer, Scientist, Guardian, and Artist series. Specific models and availability may vary by country and market.

What Is Back-Contact Cell Technology?

Traditional solar cells usually have visible silver busbars and grid lines on the front. These metal lines collect and transmit electrical current, but they also block a small amount of sunlight.

Back-contact technology moves the positive and negative electrical contacts mainly to the rear of the solar cell. This reduces or removes visible metal lines from the front, allowing more sunlight to reach the active cell surface while giving the module a cleaner and more uniform appearance.

The HPBC 2.0 technology used in the Hi-MO X10 is LONGi’s second-generation Hybrid Passivated Back Contact technology.

In simple terms, its main advantage can be described as follows:

Less shading on the front allows the cell to absorb more sunlight, while electrical current is collected and transmitted through the rear structure.

What Does the 0BB Design Mean?

“BB” stands for busbar, which refers to the main conductive lines on a solar cell. A 0BB design means that the cell does not use traditional front-side busbars.

The Hi-MO X10’s 0BB structure creates a cleaner appearance while reducing optical shading and shortening the electrical transmission path. According to LONGi’s technical information, this design can also reduce mechanical stress on the cells, supporting improved long-term reliability.

This makes the Hi-MO X10 particularly suitable for residential buildings, villas, hotels, and commercial properties where rooftop appearance is important.

What Is the Purpose of TaiRay Silicon Wafers?

The silicon wafer is the foundation of a solar cell and one of the most important components inside a photovoltaic module. The Hi-MO X10 uses LONGi’s N-type TaiRay silicon wafers.

According to information published by LONGi Europe, TaiRay wafers offer approximately 16% greater bending strength than conventional silicon wafers. This can help reduce the risk of microcracks during transportation, installation, and long-term operation.

Microcracks are not always visible from the outside, but they may affect electrical transmission and long-term power generation. Greater mechanical strength is therefore especially valuable for large commercial modules, complex transportation conditions, and areas exposed to strong winds or heavy snow.

Hi-MO X10 Power and Efficiency

The Hi-MO X10 is not a single module model. It is a complete product family containing different sizes, power ratings, structures, and application-focused designs.

In the European market, certain residential LR7-54HVH models provide approximately 480 to 500 watts of power, with maximum module efficiencies of around 24.5%. Some higher-efficiency residential models can reach approximately 510 watts and 25% efficiency.

Large-format Scientist models designed for commercial and industrial applications can reach approximately 640 to 670 watts. Exact specifications should always be confirmed using the official datasheet for the selected model.

A module efficiency of 24.5% means that, under standard test conditions, a module can convert approximately 24.5% of the incoming solar energy into electrical power. Higher efficiency generally allows more system capacity to be installed within the same available roof area.

The stated output of 500 W or 670 W is measured under Standard Test Conditions, or STC. These conditions include solar irradiance of 1,000 watts per square metre, a cell temperature of 25°C, and an AM1.5 solar spectrum.

Actual output depends on many factors, including weather, roof orientation, installation angle, module temperature, shading, inverter efficiency, and cable losses.

Performance in Hot Weather

Higher temperatures do not necessarily mean higher solar-panel output. Strong sunlight increases available solar energy, but rising cell temperatures reduce the module’s electrical power.

Some Hi-MO X10 models have a maximum-power temperature coefficient of approximately −0.26% per degree Celsius. This means that when the cell temperature rises above the standard test temperature, maximum output decreases by approximately 0.26% for every additional degree Celsius.

A temperature coefficient with a smaller negative value generally indicates better power retention in hot conditions. This characteristic can be particularly valuable during hot summers in Serbia, Southern Europe, and the Balkan region.

Low-Light and Partial-Shading Performance

Residential and commercial rooftops may be affected by partial shading from chimneys, trees, leaves, dirt, antennas, or nearby buildings. In conventional modules, partial shading can cause a significant reduction in output and may also create localised high-temperature areas known as hot spots.

The Hi-MO X10 uses an optimised structure designed for shaded environments. According to LONGi’s published test information, its shading optimisation technology can reduce related power losses by more than 70% and lower local hot-spot temperatures.

However, actual performance depends on the shape and duration of the shade, string configuration, roof layout, and inverter solution. Shading-resistant technology does not eliminate the need for professional site assessment and system design.

Long-Term Degradation and Service Life

Solar modules gradually lose a small amount of output over many years of operation. Some Hi-MO X10 datasheets specify first-year degradation of no more than 1%, followed by annual degradation of approximately 0.35% from the second to the thirtieth year.

Certain models also include a 30-year linear power warranty. Product-warranty periods may vary depending on the model, series, and sales market.

For this reason, a solar project should not be evaluated only according to its initial rated power. Long-term retained output, product warranties, installation quality, and local after-sales support should also be considered.

Main Hi-MO X10 Product Series

Explorer Series

The Explorer series is designed as a versatile solution for mainstream residential and commercial distributed photovoltaic projects. It balances high efficiency, reliability, and overall project economics.

Some European residential Explorer models provide approximately 480 to 500 watts, making them suitable for rooftops with limited space where customers want to install more total system capacity.

Scientist Series

The Scientist series places greater emphasis on advanced technology, high efficiency, and higher power output. It combines HPBC 2.0 technology, TaiRay silicon wafers, and a 0BB structure.

Some large-format Scientist modules can reach approximately 640 to 670 watts. These products are particularly suitable for factories, warehouses, logistics centres, and large commercial rooftops.

Guardian Series

The Guardian series is designed for specialised operating environments. It includes products with features such as anti-dust designs, reduced reflection, lightweight construction, and enhanced fire-safety performance.

For example, certain Guardian lightweight modules can reach approximately 560 watts and around 24.8% efficiency while weighing approximately 16.3 kilograms. They are mainly intended for older factories, warehouses, and lightweight roofs with limited structural load capacity.

Anti-glare versions are suitable for locations such as airports, roads, and other areas where reflected light must be carefully controlled.

Artist Series

The Artist series is a full-black product designed for the residential market. Because the front surface does not contain obvious metal busbars, the modules blend more naturally with dark-coloured roofs.

Some European Artist models provide up to approximately 500 watts with module efficiencies of around 24.5%. They are suitable for villas, modern homes, and projects where architectural appearance is an important consideration.

Which Projects Are Suitable for the Hi-MO X10?

For residential rooftops, the X10’s main advantages include high power per square metre, an attractive full-black appearance, good low-light behaviour, and strong long-term energy-generation potential. High-efficiency modules are especially valuable when roof space is limited.

For commercial and industrial projects, high-power modules can reduce the number of panels needed to achieve a target system capacity. This may also reduce the required quantity of mounting structures, cables, connectors, and installation labour.

The Guardian series provides specialised solutions for lightweight roofs, dusty environments, and locations with strict reflection requirements.

For hot, windy, snowy, or dusty regions, project developers should also consider the module’s temperature coefficient, mechanical-load rating, glass configuration, anti-dust design, and applicable local certifications.

Conclusion

The main value of the LONGi Hi-MO X10 can be summarised in four areas:

Higher efficiency, greater energy generation per square metre, improved suitability for different application environments, and a cleaner visual appearance.

The series combines HPBC 2.0 back-contact technology, N-type TaiRay silicon wafers, and a 0BB structure. Different versions are available for residential rooftops, standard commercial and industrial buildings, low-load roofs, dusty environments, and locations requiring low-reflection modules.

When selecting a model, it is important not to focus only on the advertised 500 W or 670 W power rating. Module dimensions, weight, voltage, current, single-glass or dual-glass construction, temperature coefficient, warranty conditions, inverter compatibility, local certification, and after-sales support must also be considered.

The final product selection should always be based on LONGi’s latest official datasheets and certification documents for the country in which the system will be installed.