We got rid of the ribbons, so you get more power.

A new generation of back contact modules with Integrated Conductive Interconnection (ICI): a ribbon-free design and a gapless cell architecture. Up to 20 W of additional module power.

Hi-MO X12 · continuous stripsConventional · cell gaps and ribbons
ICI · ribbon-free design · gapless cell architecture

Gapless.
Up to 690 W.

Download datasheetsContact LONGi
The technology

Building on the success of LONGi’s Hi-MO X10 and EcoLife series, the new Hi-MO X12 introduces a fundamentally different approach to solar cell interconnection.

Integrated Conductive Interconnection (ICI) replaces conventional metal ribbons with a full sheet of conductive metal foil more than 400 meters long per module. This reduces power losses and makes the cells less vulnerable to mechanical stress. ICI also brings a gapless cell architecture, which increases the area available to capture sunlight.

Conventional interconnection

Metal ribbons connect the cells in a conventional module.

These ribbons need thousands of solder joints and add electrical resistance. Soldering also exposes cells to high temperatures, which can create mechanical stress.

More than 15,000 potential solder-joint failure points
ICI · ribbon-free design

A full sheet of conductive metal foil replaces ribbons and solder joints.

The foil carries electricity between cells in place of ribbons. Electrical resistance drops and mechanical stress spreads more evenly across the cells.

Up to 8 W additional power · 60% lower internal stress (50 MPa to 20 MPa) · metal foil more than 400 m long per module
ICI · gapless cell architecture

Overlapping cells close the gaps, so more sunlight reaches the active surface.

Hidden busbars create a continuous front surface and increase the area available to capture sunlight.

Up to 12 W additional power through gapless cell architecture
Hi-MO X12

Up to 20 W of additional module power.

A new generation of high-efficiency modules that makes even better use of LONGi’s HPBC 2.0 back contact technology.

Up to 690 W · 25.72% maximum module efficiency
Conventional · 5 layers
  • Glass
  • Encapsulant film
  • Cell
  • Encapsulant film + ribbons
  • Rear layer
  • Rear layer
  • Conductive metal foil
Additional power, up to+0 W
Module overview

Hi-MO X12 at a glance

Up to +20 W
Additional module power through ICI: ribbon-free design and gapless cell architecture
+8 W ribbon-freeConventional+12 W gapless cell architecture
60%
Lower internal mechanical stress (50 MPa to 20 MPa)
50 MPa20 MPa
HPBC 2.0
Proven Hybrid Passivated Back Contact cell technology
690 W
Maximum module power
525 W54-cell580 W60-cell690 W72-cell
25.72%
Maximum module efficiency
Electricity25.72%
−0.26%/°C
Power temperature coefficient
W°C
8 versions
6 C&I and 2 full-black residential versions
30 years
Power performance warranty, ≥88.85% guaranteed output at year 30
100%≥88.85%Year 1Year 30
Hi-MO X12 product portfolio

Find the right module for your project

Commercial and industrial modules

High module power for larger installations

The Hi-MO X12 portfolio includes 54-cell configurations with up to 525 W and 25.72% module efficiency, 60-cell configurations with up to 580 W and 72-cell configurations with up to 690 W rated power. The choice of module format depends on the roof structure and system design.

The 54-cell and 60-cell formats give installers additional options for fitting modules around roof obstacles and within the usable roof layout. The 72-cell format extends the portfolio to projects designed around larger modules.

54-cell Hi-MO X12 module, top edge detail

54-cell modules

Rated power
495–525 W
Max. efficiency
25.72%
Dimensions
1800 × 1134 mm
LR7-54WVHDatasheet ↓LR7-54WVDDatasheet ↓

Preliminary informationFinal specifications available after the first production run.

EcoLife Hi-MO X12

Residential modules

The EcoLife Hi-MO X12 residential range brings Integrated Conductive Interconnection (ICI), with its ribbon-free design and gapless cell architecture, to compact modules for homes with high aesthetic demands. The full-black design creates a uniform appearance across the roof.

For installers, the residential range offers a choice between single-glass and dual-glass constructions without changing the full-black product positioning. The appropriate version depends on the project specification and installation requirements.

500 W
rated power, up to
24.74%
module efficiency, up to
EcoLife Hi-MO X12 LR7-54WVB full-black module, front view

Full-black, single-glass

Rated power
485–500 W
Max. efficiency
24.74%
Dimensions
1800 × 1134 mm
LR7-54WVBDatasheet ↓

Preliminary informationFinal specifications available after the first production run.

Proven back contact technology

Based on HPBC 2.0

Hi-MO X12 builds on LONGi’s proprietary Hybrid Passivated Back Contact (HPBC) 2.0 technology, already used in the Hi-MO X10 and EcoLife product families. The technology is known for its high conversion efficiency and reliability.

01+

Shading Optimizer with Weak Conduction Design

~72%lower power loss with half of one cell shaded

Partial shading from rooftop equipment or other obstructions can cause substantial power losses. HPBC 2.0 uses LONGi’s Shading Optimizer and Weak Conduction Design to allow electrical current to bypass shaded areas, limiting the impact on the rest of the module.

In independent CPVT tests of Hi-MO X10, shading half of a single cell caused an average power loss of just 10.15%, compared with 36.48% for the tested TOPCon modules. This represents approximately 72% lower power loss under the specified test conditions.

02+

Lower hotspot temperatures

Up to 60°Clower hotspot temperatures in comparative tests

Shaded solar cells can develop localized hotspots that place additional thermal stress on the module. HPBC 2.0’s shading management technology helps limit this temperature rise.

In TÜV Rheinland comparative tests of Hi-MO X10 and TOPCon modules, hotspot temperatures were up to 60°C lower for the tested HPBC 2.0 modules under specified shading conditions.

03+

TaiRay silicon wafers

16%higher bending strength than conventional reference wafers

HPBC 2.0 uses LONGi’s proprietary n-type TaiRay silicon wafers. They improve material quality and mechanical strength.

LONGi reports 16% higher bending strength compared with conventional reference wafers. This increases resistance to breakage during cell manufacturing and handling.

04+

Bipolar Hybrid Passivation

>745 mVopen-circuit voltage in mass-produced cells

LONGi’s proprietary Bipolar Hybrid Passivation technology reduces electrical losses inside HPBC 2.0 cells and supports high conversion efficiency.

The technology has achieved open-circuit voltages exceeding 745 mV in mass-produced HPBC 2.0 cells.

05+

Advanced anti-reflection coating

12%less short-wavelength light reflection

HPBC 2.0 uses an optimized cell surface and anti-reflection coating to reduce the amount of sunlight reflected away from the cell. More incoming light can therefore contribute to electricity generation.

LONGi has reported a 12% reduction in short-wavelength light reflection through improvements to its cell surface microtexture.

06+

Improved resistance to UV-induced degradation

UVoptimized surface passivation protects the cell

Prolonged exposure to ultraviolet radiation can affect solar cell performance over time. HPBC 2.0 uses optimized surface passivation to help protect the cell against UV-related degradation.

This technology is intended to support long-term electrical performance by reducing degradation mechanisms associated with UV exposure.

Benefits

What Hi-MO X12 delivers

01

Improving returns on solar investment

Hi-MO X12’s Integrated Conductive Interconnection (ICI), with its ribbon-free design and gapless cell architecture, delivers up to 20 W of additional module power in LONGi’s technical comparison. Higher power density allows more capacity to be installed within a limited roof area. This increases the potential for electricity generation without requiring additional space. For businesses, this can mean greater savings on purchased electricity and better use of fixed project costs, improving the potential return on their solar investment.

+20 W
02

Protecting long-term energy yields

Hi-MO X12’s ICI reduces internal mechanical stress by 60%, from 50 MPa to 20 MPa. This helps reduce the risk of microcracks and associated power losses. It supports reliable electricity generation and protects the long-term value of the installation.

60%
03

Maintaining high power output in hot weather

Hi-MO X12’s low power temperature coefficient of −0.26%/°C helps limit power losses as cell temperatures rise. This helps maintain electricity generation during hot weather and reduces the need to purchase electricity from the grid.

−0.26%/°C
04

Greater flexibility for different roof layouts

Hi-MO X12 offers different module formats in 54, 60 and 72 cells to accommodate a wide range of rooftop dimensions and installation requirements. Installers can select the most suitable configuration for each project and make better use of the available roof space.

54 · 60 · 72
05

Securing long-term performance with a 30-year warranty

The module comes with a 30-year performance warranty, with a maximum degradation of 1% in the first year and 0.35% annually thereafter. At least 88.85% of rated power is guaranteed after 30 years. This gives project owners a defined performance baseline for long-term energy yield and financial planning.

30 years
06

Lower electricity bills for residential homes with a roof that looks great

Homeowners expect their solar panels to deliver reliable electricity for many years. EcoLife Hi-MO X12 reduces mechanical stress on solar cells to lower the risk of damage that could affect long-term performance. Its 30-year performance warranty gives homeowners additional confidence in their investment. The full-black design also provides a uniform appearance that blends naturally into the roof – and looks stunning.

Full black
Applications and scenarios

High-efficiency solar for different rooftop requirements

The Hi-MO X12 portfolio includes module formats for commercial and industrial installations as well as compact full-black residential modules.

Commercial rooftops fitted with Hi-MO X12 modules (concept image)
Concept image · AI-generated
Commercial rooftops

For buildings with limited roof space

Commercial buildings often have ventilation equipment, skylights and access requirements that reduce the area available for solar panels. High-efficiency Hi-MO X12 modules help system designers maximize rated solar capacity within the usable module area. The 54-cell C&I configurations reach up to 25.72% module efficiency, making them particularly relevant for projects where available space is a primary consideration.

For installers and EPCs, the choice of 54-cell and 60-cell formats creates flexibility in module layout. Different formats can help accommodate roof geometry and usable installation zones.

Industrial rooftops fitted with Hi-MO X12 modules (concept image)
Concept image · AI-generated
Industrial rooftops

For industries with high energy demand

For energy-intensive businesses, maximizing solar generation can help reduce dependence on purchased electricity. Hi-MO X12’s higher power density allows more solar capacity to be installed on available industrial roof space. This gives businesses more solar electricity for on-site consumption and reduces their energy costs.

Combined with battery energy storage, businesses can use more of their solar electricity outside daylight hours and further reduce grid electricity purchases.

Residential rooftops fitted with Hi-MO X12 modules (concept image)
Concept image · AI-generated
Residential rooftops

For homes that want power and aesthetics at once

The EcoLife Hi-MO X12 residential series helps homeowners generate more electricity from their roofs and reduce their electricity bills. With up to 500 W of power and 24.74% module efficiency, the panels make efficient use of limited roof space. The full-black design blends into the roof for a clean, uniform and beautiful appearance.

Documentation and contact

Plan your next solar project with Hi-MO X12

Explore the technical specifications of the Hi-MO X12 portfolio or contact our European team to discuss suitable module configurations for your commercial or industrial project.

Download technical datasheets and certificates ↓Contact LONGi →