LONGi 620W Bifacial Solar Panel

LONGi 620W Bifacial Solar Panel Overview

The LONGi 620W Bifacial Solar Panel is designed for solar installations where high module output, efficient use of available space and long-term power generation are important. Its 620W rated capacity makes it suitable for commercial rooftops, industrial facilities and large ground-mounted solar projects.

This module combines HPDC cell technology with a bifacial structure that allows the rear surface to capture reflected sunlight. When installed above a suitable reflective surface with sufficient rear-side clearance, the panel can benefit from additional energy generation.

With 23.0% module efficiency, dual-glass construction and a 1500V DC maximum system voltage, this panel is an option for appropriately designed large-scale solar arrays. Its electrical characteristics also make it important to check the inverter’s MPPT range, maximum input voltage and current limits before installation.

For solar buyers in Pakistan, the right panel selection involves more than comparing wattage. Module dimensions, mounting requirements, string configuration, temperature conditions and the intended system capacity should all be considered before purchasing.

Key Features and Benefits

HPDC Cell Technology

The LONGi 620W solar panel uses HPDC cell technology to deliver high module power and efficiency. Its 620W rated output can help reduce the number of modules required to reach a target installed capacity compared with lower-wattage panels, depending on the project design.

For commercial buyers, installers and EPC contractors, this can simplify module quantity planning. The final layout must still account for available installation space, inverter compatibility, electrical limits and mounting requirements.

For more information click here: LONGi Solar Panel Official Website.

Bifacial Energy Generation

The bifacial solar panel design allows the rear surface to capture reflected sunlight in addition to the light reaching the front surface. This can contribute to additional electricity generation when the installation environment supports useful rear-side irradiance.

The amount of additional generation depends on factors such as ground reflectivity, panel elevation, row spacing, orientation and rear-side shading. Ground-mounted installations with suitable clearance may provide better conditions for bifacial performance.

Rear-side energy gain should not be treated as a fixed percentage of the panel’s rated output. Actual results depend on the site and system design.

23.0% Module Efficiency

With 23.0% module efficiency, the LONGi 620W panel converts a substantial proportion of the sunlight reaching its surface into electricity under standard test conditions.

Higher module efficiency can help buyers install more rated power within a given area. This is particularly useful when planning commercial rooftops or installations where available space is limited.

Actual energy production still depends on sunlight, module temperature, orientation, shading, dust accumulation and the performance of the complete solar system.

Low Power Temperature Coefficient

The panel has a maximum-power temperature coefficient of -0.280%/°C. This indicates that maximum power decreases as cell temperature rises above the reference temperature, all else being equal.

Pakistan’s hot summer conditions make temperature management important for solar installations. Suitable mounting clearance and airflow behind the modules can help manage operating temperatures and avoid unnecessary heat build-up.

Dual-Glass Construction

The LONGi 620W bifacial module features 2.0 + 2.0 mm heat-strengthened dual glass and an anodised aluminium alloy frame.

The dual-glass design provides front and rear glass surfaces for the bifacial module. Proper handling, transportation and installation are important to protect the panel during lifting and mounting.

Installers should use suitable clamps and mounting arrangements while following the applicable installation requirements.

Long-Term Power Performance

The panel has a specified first-year power degradation of less than 1%, followed by 0.4% annual degradation from years 2 to 30.

These figures describe the panel’s specified power-retention profile. Actual electricity generation over its service life can vary with environmental exposure, operating temperatures, installation quality, maintenance and other site conditions.

Best For

The LONGi 620W Bifacial Solar Panel is suitable for consideration in the following applications:

• Commercial solar installations requiring high module output.

• Industrial solar systems with sufficient roof or ground space.

• Large-scale solar power projects using high-wattage modules.

• Ground-mounted solar arrays designed to benefit from rear-side irradiance.

• Commercial rooftops where module efficiency and space utilisation are important.

• Solar installers and EPC contractors designing systems around high-output bifacial panels.

Final suitability depends on the site’s structural conditions, inverter specifications and electrical system design.

When Another Panel May Be Better

A different solar module may be more suitable when:

• The available installation area cannot accommodate the panel’s dimensions.

• The selected inverter’s maximum input current or voltage limits do not suit the planned string configuration.

• The project requires a smaller module format for mounting or handling reasons.

• The rear surface cannot receive useful reflected sunlight and the project does not benefit sufficiently from bifacial construction.

• The installation requires different electrical characteristics or a different module format.

Before purchasing panels for a large project, confirm the dimensions, electrical ratings, mounting requirements and inverter compatibility with the system designer.

Cell and Module Technology

The LONGi 620W Bifacial Solar Panel combines HPDC cell technology with a bifacial dual-glass module structure.

Its bifacial design allows the rear surface to contribute to electricity generation when reflected sunlight reaches the cells. The amount of additional energy depends on the installation surface, panel height, row spacing, orientation and shading.

The module contains 132 cells arranged in a 6 × 22 configuration. Its large format and 30 mm frame should be considered when planning transportation, lifting, mounting rails and installation access.

For a properly designed solar array, the panel’s electrical characteristics must be checked against the selected inverter’s MPPT operating range, maximum DC voltage and input-current limits.

Technical Specifications

Performance and Degradation

Long-term power retention is an important consideration when selecting solar panels for commercial and industrial projects.

The LONGi 620W panel has a specified first-year power degradation of less than 1%, followed by an annual degradation rate of 0.4% from years 2 to 30.

Its warranted power-output profile gives the following reference points:

• Year 10: 95.4% warranted power output

• Year 20: 91.4% warranted power output

• Year 30: 87.4% warranted power output

These figures help buyers understand the panel’s long-term power warranty. They do not guarantee a particular annual electricity yield because real-world production also depends on sunlight, temperature, shading, soiling and system performance.

The -0.280%/°C temperature coefficient is relevant when evaluating installations exposed to high temperatures. Suitable mounting and ventilation can help manage operating conditions.

Performance Considerations for Pakistan

Solar installations in Pakistan can experience high summer temperatures, dust accumulation and changing sunlight conditions. These factors should be considered when designing a system around the LONGi 620W bifacial module.

Temperature management: Allow suitable clearance behind the panels for airflow. Poor ventilation can increase module temperature and reduce power output.

Dust and cleaning: Dust and dirt on the glass reduce the sunlight reaching the cells. Establish a cleaning schedule based on local conditions, water quality and site safety.

Bifacial mounting: Ground reflectivity, rear-side clearance and row spacing influence the additional energy that can be captured by the rear surface. Avoid mounting arrangements that unnecessarily obstruct it.

Electrical design: String sizing must account for open-circuit voltage under cold conditions, operating voltage, short-circuit current and inverter input limits. The 1500V DC rating is the maximum system voltage, not a recommended string voltage for every installation.

Structural planning: Each panel weighs 33.5 kg and measures 2382 × 1134 mm. The mounting structure and handling arrangements should be suitable for the module’s size and weight.

LONGi 620W Bifacial Solar Panel Price in Pakistan

The longi 620w bifacial solar panel price in pakistan is an important consideration for buyers planning commercial, industrial or large-scale solar installations.

The current price of the LONGi 620W Bifacial Solar Panel in Pakistan is Rs. 24,800 per panel.

The total project cost depends on the number of modules, transportation, mounting structure, inverter selection, installation and other system components. Dealers, installers and bulk buyers can contact Hajvery Solar Energy for quantity-based enquiries and availability confirmation.

Solar panel prices can change with market conditions and stock. Confirm the applicable price before placing an order.

LONGi Solar Panel Authenticity and Product Verification

When comparing solar panels, buyers should assess the exact model, electrical specifications, physical condition and applicable warranty rather than relying on wattage alone.

Before purchasing the LONGi 620W bifacial panel, confirm:

• The exact model code matches LR8-66HGD-620M.

• The panel’s physical condition is acceptable.

• Serial information and applicable warranty details are available for verification.

• The selected inverter supports the planned string voltage and current.

• The mounting structure is suitable for the module’s dimensions and weight.

Do not assume that a panel is A-grade, new or covered by a particular local warranty arrangement without checking the actual product and seller terms.

Hajvery Solar Product Verification

Hajvery Solar Energy helps buyers assess important product details before ordering. For a commercial or industrial installation, matching the panel’s electrical characteristics to the proposed inverter can help prevent avoidable system-design issues.

Customers should confirm the exact model, serial information, physical condition and applicable warranty before finalising their purchase. Installers should also verify the complete string configuration, including temperature-adjusted voltage and current compatibility.

Hajvery Solar Energy serves customers from 280K Block J-1, Johar Town, Lahore. Buyers can enquire about panel availability, quantity-based pricing and product details before purchasing.

Warranty

The LONGi 620W Bifacial Solar Panel has two distinct warranty periods:

• 12-year materials and processing warranty: Covers the applicable materials and processing warranty scope, subject to the relevant terms.

• 30-year extra linear power output warranty: Provides long-term warranted power-output coverage under the applicable performance warranty terms.

The product warranty and performance warranty are separate forms of coverage. Buyers should confirm the applicable claim procedure, conditions and coverage provider with Hajvery Solar Energy before purchase.

The stated warranty periods should not be interpreted as a guarantee against every type of damage, improper handling or installation-related issue.

Frequently Asked Questions

1. What is the LONGi 620W Bifacial Solar Panel price in Pakistan?

The current price of the LONGi 620W Bifacial Solar Panel in Pakistan is Rs. 24,800 per panel. Contact Hajvery Solar Energy to confirm current availability and quantity-based pricing.

2. What are the LONGi 620W bifacial solar panel specifications?

The panel has a rated output of 620W, module efficiency of 23.0%, bifaciality of 80 ± 5%, maximum power voltage of 40.91V and maximum power current of 15.16A.

3. What is the exact model number of the LONGi 620W panel?

The exact model code is LR8-66HGD-620M.

4. Is the LONGi 620W solar panel bifacial?

Yes. Its bifacial construction allows the rear surface to contribute to electricity generation when suitable reflected sunlight reaches it. Actual rear-side gain depends on the installation layout and surrounding surface conditions.

5. What is the efficiency of the LONGi 620W solar panel?

The panel has a 23.0% module efficiency rating. Actual energy production depends on sunlight, temperature, orientation, shading and other system conditions.

6. What is the warranty of the LONGi 620W Bifacial Solar Panel?

It has a 12-year materials and processing warranty and a 30-year extra linear power output warranty, subject to the applicable warranty terms.

7. Is the LONGi 620W panel suitable for commercial solar systems?

Yes. Its high rated output, bifacial construction and 1500V DC maximum system voltage make it suitable for consideration in commercial, industrial and large-scale projects. Final suitability depends on the site’s structural and electrical requirements.

8. Where can I buy the LONGi 620W Bifacial Solar Panel in Pakistan?

You can contact Hajvery Solar Energy at 280K Block J-1, Johar Town, Lahore, to enquire about the product, price, availability and system compatibility.

Buy LONGi 620W Bifacial Solar Panel from Hajvery Solar Energy

Choose Hajvery Solar Energy for enquiries about the LONGi 620W Bifacial Solar Panel. Whether you are planning a commercial rooftop, an industrial installation or a larger solar project, confirm the exact model, electrical compatibility and applicable warranty before ordering.

Contact Hajvery Solar Energy for product details, bulk purchase enquiries and guidance on selecting panels for your solar system.

For more options, view LONGi Solar Panel in Pakistan.