Solar Panels

LONGi LR8-66HVD-645M Bifacial 645W Solar Panel

645W Hi-MO X10 bifacial solar panel featuring HPBC 2.0 technology for high-performance commercial, industrial and utility-scale photovoltaic power plants.

Solar Panels

LONGi LR8-66HVD-645M Bifacial 645W Solar Panel

645W Hi-MO X10 bifacial solar panel featuring HPBC 2.0 technology for high-performance commercial, industrial and utility-scale photovoltaic power plants.

Datasheet

Brand

LONGi

Model

LR8-66HVD

Country of origin

China

Rated power, W

645

Specifications

MODEL OVERVIEW

LONGi LR8-66HVD-645M Bifacial 645W Solar Panel

LONGi LR8-66HVD-645M is a next-generation 645W bifacial solar module designed for high-performance commercial, industrial and utility-scale photovoltaic power plants. The module combines HPBC 2.0 (Hybrid Passivated Back Contact) technology, bifacial energy generation and an advanced cell architecture to maximize energy yield while making efficient use of the available installation area.

A key feature of the LONGi LR8-66HVD-645M is its Back Contact cell design, where all electrical contacts are positioned on the rear side of the solar cells. This architecture reduces front-side shading, improves solar energy absorption and helps maintain stable power generation even under high operating temperatures, uneven irradiance or partial shading. Thanks to its bifacial design, the module also captures reflected solar radiation, increasing total energy production depending on installation conditions.

Key Specifications:

Series

Hi-MO X10

Technology

HPBC 2.0

Module type

Bifacial Dual Glass

Efficiency

up to 23,88 %

Cell type

N-Type

Maximum system voltage

1500 V DC

Dimensions

2382×1134×30 mm

Weight

32,5 kg

Warranty

15-Year product warranty / 30-Year linear power warranty

Key Advantages of the Model:

• Next-Generation HPBC 2.0 Technology

LONGi LR8-66HVD-645M is built on HPBC 2.0 (Hybrid Passivated Back Contact) technology, where all electrical contacts are positioned on the rear side of the solar cells. This design increases the active light-absorbing area, reduces shading losses caused by front-side busbars and helps maintain stable power generation throughout the module’s service life.

• High Efficiency with Optimized Power Output

With a rated power of 645W and module efficiency of up to 23.88%, the LR8-66HVD-645M is well suited for projects requiring high energy yield and efficient use of available installation space. The module delivers reliable performance in modern string PV systems and supports predictable energy production over its entire operational lifetime.

• Bifacial Dual Glass Design

The Bifacial Dual Glass construction enables power generation from both the front and rear sides of the module by utilizing reflected solar radiation. The highest energy gains can be achieved in ground-mounted photovoltaic systems, on light-colored rooftops and at other sites with high surface reflectivity (high albedo).

Applications:

LONGi LR8-66HVD-645M is designed for commercial, industrial and utility-scale photovoltaic power plants, where high system reliability, predictable energy yield and a low levelized cost of electricity (LCOE) are essential. The module supports systems with a maximum system voltage of 1500 V DC, is fully compatible with modern string inverters and is suitable for both new PV installations and the expansion or modernization of existing solar power plants.

How to Choose the Right LONGi LR8-66HVD Module

The LONGi Hi-MO X10 LR8-66HVD series includes several module variants with different power ratings and electrical characteristics. All models feature HPBC 2.0 technology, N-Type solar cells and a Bifacial Dual Glass design, allowing the most suitable module to be selected according to the technical requirements of each photovoltaic project.

The LONGi LR8-66HVD-645M is an excellent choice for PV systems where a 645W module best matches the required string configuration and electrical design. It provides the same advanced technology and mechanical design found across the Hi-MO X10 product family while meeting specific project requirements.

If higher module power is required, consider the LONGi LR8-66HVD-650M Bifacial 650W Solar Panel. Both models share the same Hi-MO X10 platform, HPBC 2.0 technology, Bifacial Dual Glass construction and identical dimensions. The main differences are the rated power, module efficiency and electrical characteristics, making it possible to select the most appropriate module for each application.

Regardless of the selected model, the LONGi Hi-MO X10 LR8-66HVD series is fully compatible with modern string inverters, supports 1500 V DC systems and is designed for commercial, industrial and utility-scale photovoltaic power plants.

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LONGi LR8-66HVD-645M Bifacial 645W Solar Panel