LONGi 645W Bifacial Solar Panel Overview

The LONGi 645W Bifacial solar panel price in Pakistan is an important consideration for homeowners, installers and commercial solar buyers looking for a high-output solar module. The LONGi 645W Bifacial Solar Panel belongs to the Hi-MO X10 Guardian series and uses BC cell technology with TaiRay wafer technology. Moreover, it delivers 645W rated power and 23.88% module efficiency.

The LONGi 645W solar panel helps buyers make productive use of available installation space. In addition, its bifacial design allows the rear side to generate extra electricity when the ground or surrounding surfaces reflect sunlight towards the module.

The panel features a dual-glass structure and an anti-glare coating. Therefore, buyers can consider these features when selecting modules for residential areas and other locations where reflected light matters.

For buyers in Pakistan, the final energy yield depends on sunlight, module temperature, installation angle, dust accumulation, rear-side clearance and the electrical design of the solar system. Consequently, installers should assess the site before estimating system output.

Key Features of the LONGi 645W Bifacial Solar Panel

BC Cell Technology and TaiRay Wafer

The panel combines BC cell technology with LONGi’s TaiRay wafer technology. Together, these technologies form an important part of the module’s design.

For buyers, the main consideration is how the panel’s rated output and efficiency fit the available installation area. Therefore, installers should plan the string design, mounting system and inverter selection carefully to achieve suitable system performance.

Bifacial Energy Generation

A bifacial solar panel generates electricity from both its front and rear sides. However, the amount of additional energy depends on the light reaching the rear surface.

For example, light-coloured roofs, suitable ground surfaces, mounting height and panel spacing can improve rear-side light exposure. The panel has a 70 ± 5% bifaciality rating. However, this does not mean every installation will produce 70% more electricity. Instead, actual additional generation varies with site conditions.

High Module Efficiency

The 23.88% module efficiency allows the LONGi 645W solar panel to convert a substantial portion of the sunlight reaching its surface into electrical power under standard test conditions.

Consequently, higher module efficiency can be valuable when available roof space is limited. Nevertheless, the total number of panels required depends on the project’s energy demand, usable installation area and inverter configuration.

Anti-Glare Glass Design

The panel uses 2.0 mm anti-glare coated semi-tempered glass on the front and 2.0 mm semi-tempered glass on the rear. Its low-reflection glass design helps reduce reflected light.

As a result, this feature may benefit residential installations and other glare-sensitive locations. Even so, installers should assess site-specific reflection requirements before installation.

Low Power Degradation

The panel has a stated first-year power degradation of 1%, followed by 0.35% annual degradation from years 2 to 30 under its performance warranty terms.

This degradation profile helps buyers evaluate expected long-term output. However, actual electricity production also depends on environmental conditions, installation quality, cleaning and other system components.

Dual-Glass Construction

The dual-glass design provides a glass layer on each side of the module. The panel also features an anodized aluminium alloy frame and an IP68 junction box.

In addition, the module has a maximum static loading rating of 5400 Pa on the front side and 2400 Pa on the rear side. Installers must still design the mounting structure for local wind, mounting and site conditions.

Best Applications for the LONGi 645W Solar Panel

The LONGi 645W Bifacial Solar Panel may suit several types of solar installations, including:

• Residential solar systems where high-output modules fit the roof layout.
• Commercial rooftops that require substantial installed capacity.
• Ground-mounted solar projects where installers can improve rear-side light exposure.
• Limited-roof-space installations where module efficiency matters.
• Solar installers and dealers looking for bifacial modules with verified electrical ratings.
• Glare-sensitive projects where anti-glare module design is relevant.

Ultimately, buyers should base their selection on the complete system design rather than wattage alone.

When the LONGi 645W Bifacial Solar Panel May Not Be Suitable

This panel may not suit every project. Therefore, consider the following points before ordering:

• Limited mounting space: Its physical dimensions may not fit smaller roofs or restricted mounting areas.
• Low rear-side light exposure: A bifacial panel’s additional rear-side contribution may remain limited where the rear surface receives little reflected light.
• Electrical incompatibility: The panel’s voltage and current must match the inverter’s MPPT range and input-current limits.
• Weight restrictions: At 32.5 kg per module, the supporting structure must safely accommodate the panel and mounting system.
• Glare-sensitive sites: Although the module features an anti-glare design, installers should still check site-specific reflection requirements.

LONGi Hi-MO X10 Guardian 645W Panel Technology

The LONGi Hi-MO X10 Guardian 645W combines BC cell technology, TaiRay wafer technology and bifacial dual-glass construction.

Its bifacial design supports front-side and rear-side energy generation. Meanwhile, the anti-glare glass helps reduce reflected light. The panel’s 144-cell layout follows a 6 × 24 configuration.

For installers, rated power, operating voltage and current determine how modules can form strings. Therefore, they must consider the maximum system voltage, series-fuse rating and inverter input limits when designing the array.

Technical Specifications of the LONGi 645W Bifacial Solar Panel

LONGi 645W Solar Panel Performance and Degradation

The LONGi 645W solar panel delivers a rated 645W output under standard test conditions (STC). However, real-world power generation changes with sunlight intensity, module temperature, shading, dust and installation conditions.

Its −0.260%/°C power temperature coefficient indicates how maximum power changes with cell temperature relative to the applicable reference temperature. This specification matters in Pakistan, where solar modules can become significantly hotter than the surrounding air during summer.

The module’s performance warranty covers extra linear power output over 30 years. The specified degradation profile allows for 1% degradation in the first year and 0.35% annually from years 2 to 30. Nevertheless, buyers should review the applicable warranty conditions and coverage before purchase.

LONGi 645W Bifacial Solar Panel Performance in Pakistan

Solar installations in Pakistan must account for summer temperatures, dust, roof conditions and the electrical requirements of the selected inverter.

High temperatures: Module temperature affects output. Therefore, suitable mounting clearance and airflow behind the panel can help manage operating temperatures.

Dust and cleaning: Dust accumulation reduces the sunlight reaching the cells. For this reason, buyers should plan cleaning frequency according to site conditions and safe maintenance practices.

Bifacial installation: Rear-side generation depends on the light reflected towards the back of the panel. Consequently, mounting height, spacing and the surface below the module affect the result.

String design: Installers must check the panel’s Voc, Vmp, Isc and Imp against the inverter’s voltage and current limits. In addition, they should apply cold-weather voltage correction when calculating the maximum number of modules in a series string.

Structural support: The mounting structure must support the panel’s weight and withstand applicable site loads. Therefore, installers should use suitable clamps, mounting points and installation procedures.

LONGi 645W Bifacial Solar Panel Price in Pakistan

The LONGi 645W Bifacial solar panel price in Pakistan matters to homeowners, installers and commercial buyers comparing high-output modules.

The current price of the LONGi 645W Bifacial Solar Panel in Pakistan is Rs. 27,348 per panel.

The total module cost depends on the number of panels required for the project. In addition, buyers should include mounting structures, inverter capacity, cables, electrical protection and installation expenses when estimating the complete solar system budget.

For bulk orders, dealers and installers can contact Hajvery Solar Energy to discuss quantity requirements and current availability.

Authenticity and Buying Checks

Before purchasing the LONGi 645W solar panel, check the exact model identification and product condition. Also, confirm that the delivered module matches the required 645W rating and that its electrical characteristics suit the intended inverter.

Buyers should verify the serial information, applicable warranty coverage and seller-provided purchase details. For bifacial installations, ask the installer to assess rear-side light exposure rather than assuming a fixed percentage of additional generation.

Hajvery Solar Energy can help buyers discuss product selection and installation compatibility before ordering.

You can verify your LONGi 645W Bifacial Solar Panel using LONGi’s official verification page. To check the intended product, compare the exact model number and product details before completing your purchase.

Panel verification link: LONGi 645W Bifacial Solar Panel verification..

LONGi 645W Bifacial Solar Panel Warranty

The LONGi 645W Bifacial Solar Panel has a 15-year warranty for materials and processing and a 30-year warranty for extra linear power output.

These warranties cover separate areas. The product warranty covers the stated materials and processing scope, while the performance warranty relates to the specified power-output warranty. Therefore, buyers should review the applicable terms, exclusions and claim requirements before purchase.

Before You Buy the LONGi 645W Solar Panel

Before selecting the LONGi 645W solar panel, confirm the following:

• Check that the required module rating is 645W.
• Verify roof dimensions and available mounting area.
• Confirm the inverter’s maximum DC voltage and MPPT operating range.
• Check the inverter’s permitted input current against the panel’s electrical characteristics.
• Calculate the permitted series-string length using temperature-adjusted open-circuit voltage.
• Assess whether the installation allows useful rear-side light exposure.
• Confirm that the mounting structure can support the module’s weight.
• Review the applicable product and performance warranty terms.
• Confirm the price, quantity and availability with the seller.

Frequently Asked Questions About the LONGi 645W Solar Panel

1. What is the LONGi 645W Bifacial Solar Panel price in Pakistan?

The current price of the LONGi 645W Bifacial Solar Panel in Pakistan is Rs. 27,348 per panel.

However, availability and quantity-based pricing may vary. Contact Hajvery Solar Energy to confirm the latest details.

2. What is the efficiency of the LONGi 645W solar panel?

The panel has a 23.88% module efficiency. Therefore, it may suit projects where efficient use of installation space matters.

3. Is the LONGi 645W panel bifacial?

Yes. It is a bifacial solar panel that generates electricity from both sides. However, additional rear-side output depends on reflected sunlight and installation conditions.

4. What is the exact model number?

The exact model is LR7-72HVD-645M, part of the LONGi Hi-MO X10 Guardian series.

5. What are the dimensions of the LONGi 645W solar panel?

The panel measures 2382 × 1134 × 30 mm and weighs 32.5 kg. Therefore, check the mounting area and supporting structure before installation.

6. What is the warranty of the LONGi 645W Bifacial Solar Panel?

It carries a 15-year warranty for materials and processing and a 30-year warranty for extra linear power output. Nevertheless, buyers should review the applicable conditions before purchase.

7. Is the LONGi 645W panel suitable for Pakistan’s climate?

It can suit residential and commercial installations in Pakistan. However, actual performance depends on module temperature, sunlight, dust, mounting ventilation, system design and maintenance.

8. Which inverter is compatible with this LONGi 645W panel?

Compatibility depends on the inverter’s maximum DC voltage, MPPT voltage range, input-current limits and proposed string configuration. Therefore, installers should check the panel’s 54.12V open-circuit voltage and 44.77V maximum-power voltage, while also applying appropriate temperature corrections.

Buy the LONGi 645W Bifacial Solar Panel from Hajvery Solar Energy

Hajvery Solar Energy can assist buyers with product enquiries, solar-panel selection and system-planning guidance. Whether you are planning a residential rooftop installation or sourcing modules for a commercial project, confirm the required quantity, product condition, applicable warranty and inverter compatibility before ordering.

Furthermore, you can explore the available LONGi solar panels in Pakistan here: LONGi Solar Panels in Pakistan.