LONGi 640W Monofacial Solar Panel

LONGi 640W Monofacial Solar Panel Overview

The LONGi 640W Monofacial Solar Panel from the Hi-MO X10 Explorer series delivers 640W rated power with 23.7% module efficiency and advanced BC (Back Contact) cell technology. It is suitable for residential, commercial and industrial solar installations where high power output and efficient use of available space are important.

Its high wattage allows installers to achieve substantial solar capacity with fewer modules than lower-wattage panels, subject to the selected system design. This can be useful for commercial rooftops, industrial facilities and residential installations with suitable mounting space.

The module features a single-glass construction, an anodized aluminium alloy frame and an IP68-rated junction box with three bypass diodes. Its electrical characteristics, including a 44.36V voltage at maximum power and a 14.43A current at maximum power, are important when matching panels with an inverter.

Buyers looking for a LONGi 640W Monofacial Solar Panel in Pakistan should consider the complete electrical specifications, installation requirements and warranty coverage rather than selecting a panel on wattage alone.

Key Features and Benefits

BC Cell Technology

The LONGi Hi-MO X10 Explorer uses Back Contact (BC) cell technology, which places electrical contacts on the rear side of the cells. This design supports efficient use of the cell’s front surface for receiving sunlight.

With a rated output of 640W, the module is suited to installations where higher power output per panel is a priority.

High Module Efficiency

The module offers 23.7% efficiency, allowing it to convert a substantial proportion of the sunlight reaching its surface into electrical power under standard test conditions.

Higher module efficiency can help make better use of available roof space. Actual energy production depends on sunlight, module temperature, shading, orientation, soiling and the overall solar system design.

Low Power Degradation

LONGi provides a first-year power degradation specification of less than 1%, followed by a specified annual degradation rate of 0.35% from years 2 through 30.

This performance warranty structure helps buyers assess expected long-term module output. Actual production will vary with installation conditions, operating temperatures, maintenance and environmental exposure.

Durable Module Construction

The panel uses 3.2mm coated tempered glass, an anodized aluminium alloy frame and an IP68-rated junction box with three bypass diodes.

The front-side maximum static loading is 5400Pa, while the rear-side maximum static loading is 2400Pa. Appropriate mounting hardware and installation practices remain important for safe operation.

High-Voltage System Compatibility

The module has a maximum system voltage rating of 1500V DC and a maximum series fuse rating of 25A.

These limits help installers assess string configuration and electrical protection. Actual compatibility must be checked against the inverter’s maximum DC voltage, MPPT voltage range, input current limits and applicable installation requirements.

Best For

The LONGi 640W Monofacial Solar Panel can be considered for:

• Commercial solar installations requiring high module output.
• Industrial solar projects with suitable mounting structures and electrical design.
• Residential solar systems with sufficient space for larger-format panels.
• Rooftop solar installations where the available area and structural capacity support the module dimensions and weight.
• Solar installers and dealers seeking high-wattage LONGi modules for appropriately designed projects.

When Another Panel May Be Better

This panel may not be the most suitable choice for every installation.

• Small rooftops: Its 2382 × 1134mm dimensions may make placement difficult where roof space is restricted.
• Lightweight structures: Each module weighs 28.5kg, so roof loading and mounting capacity should be checked.
• Restricted inverter inputs: Its operating current and voltage must fall within the selected inverter’s limits.
• Special mounting requirements: Projects requiring smaller modules or different electrical characteristics may need another panel format.

A qualified installer should check roof dimensions, structural capacity, string voltage and current before finalising the system.

Cell and Module Technology

The LONGi Hi-MO X10 Explorer combines BC cell technology with a high-output module design. Back-contact architecture places electrical contacts on the rear of the cells, supporting the use of the front surface for light absorption.

The module uses a single-glass construction with coated tempered glass and an aluminium alloy frame. This construction should not be confused with a double-glass design.

As a monofacial solar panel, its intended energy-generation configuration should be assessed on front-side generation. Do not assume additional rear-side generation when calculating expected system output.

Technical Specifications

Performance and Degradation

The LONGi 640W module has a rated power output of 640W under standard test conditions. The rated value provides a consistent basis for comparing module power, but actual production changes with operating conditions.

Its temperature coefficient of Pmax is -0.260%/°C. This means power output generally decreases as cell temperature rises above the reference temperature, all else being equal. Good airflow beneath the modules and appropriate mounting can help manage operating temperatures.

The stated degradation schedule includes:

• First year: Less than 1% power degradation.
• Years 2–30: 0.35% annual power degradation.
• At year 30: 88.85% warranted power output, as represented by the performance warranty curve.

These warranty figures describe the warranted power-performance schedule, not a guarantee of a particular electricity bill reduction or annual energy yield.

Performance Considerations for Pakistan

Pakistan’s solar installations can experience high summer temperatures, dust accumulation and extended periods of strong sunlight. These conditions make proper system design and maintenance important.

For the LONGi 640W Monofacial Solar Panel, consider the following:

• Temperature management: Allow suitable ventilation beneath the panels to help limit excessive operating temperatures.
• Dust and cleaning: Inspect modules regularly and clean them using appropriate methods when soiling reduces light transmission.
• String design: Calculate string voltage using the module’s electrical characteristics and the site’s minimum and maximum temperatures.
• Inverter compatibility: Check operating current, short-circuit current and voltage limits rather than matching equipment by wattage alone.
• Mounting safety: Confirm the structure can support the module’s dimensions, weight and applicable wind and mechanical loads.

Correct installation helps the system operate within its designed electrical and mechanical limits.

LONGi 640W Monofacial Solar Panel Price in Pakistan

The LONGi 640W Monofacial solar panel price in pakistan is an important consideration for homeowners, installers, commercial buyers and solar dealers planning a new installation.

The current price of the LONGi 640W Monofacial Solar Panel in Pakistan is Rs. 27,200 per panel.

The final project cost depends on the number of panels required, mounting structures, inverter selection, wiring, protection equipment, labour and other installation requirements. Contact Hajvery Solar Energy to confirm current availability and quantity-based pricing before placing an order.

Buyers comparing the longi solar panel 640 watt price in pakistan should also evaluate module efficiency, electrical compatibility, dimensions and warranty coverage.

Tier 1, A-Grade and Product Authenticity

When choosing a solar module, buyers should distinguish between manufacturer specifications, product condition and seller claims.

• Product authenticity: Check the exact model identification, serial information and applicable warranty details before purchase.
• A-Grade condition: Confirm the actual product condition and any applicable grading information with the seller.
• Performance suitability: Assess module specifications, inverter compatibility and installation conditions instead of relying on wattage alone.

Avoid assuming that a particular grading label, stock condition or project certification applies without verification.

Hajvery Solar Product Verification

Before purchasing the LONGi 640W Monofacial Solar Panel, confirm that the supplied module matches the intended model and that its electrical characteristics suit your system.

Hajvery Solar Energy can help buyers with product identification and relevant purchase checks. Installers should verify the module’s voltage and current against the inverter specifications, calculate the required string configuration and ensure the mounting structure is suitable.

For commercial and bulk orders, confirm quantity, availability and delivery arrangements before finalising the purchase.

You can verify your LONGi 640W Monofacial Solar Panel through Hajvery Solar Energy before purchasing. Check the exact model number and product details to help ensure you are buying the intended panel. The official link for panel verification is given below:
LONGi 640W Monofacial Solar Panel verification.

Warranty

The LONGi 640W Monofacial Solar Panel carries a 15-year warranty for materials and processing and a separate 30-year warranty for linear power output.

These are two distinct warranty provisions. The product warranty covers the specified materials and processing scope, while the performance warranty addresses the warranted power-output schedule over time.

Buyers should confirm the applicable warranty terms, claim procedure, required product identification and any relevant conditions with Hajvery Solar Energy before ordering. Do not assume that product replacement, labour, transportation or other costs are automatically covered.

Frequently Asked Questions

1. What is the LONGi 640W Monofacial Solar Panel price in Pakistan?

The current price of the LONGi 640W Monofacial Solar Panel in Pakistan is Rs. 27,200 per panel. Confirm availability and quantity-based pricing with Hajvery Solar Energy before ordering.

2. What are the LONGi 640W Monofacial Solar Panel specifications?

The module has a rated output of 640W, 23.7% efficiency, BC cell technology and a maximum system voltage of 1500V DC. Its dimensions are 2382 × 1134 × 30mm, and it weighs 28.5kg.

3. What is the efficiency of the LONGi 640W panel?

The module efficiency is 23.7%. Actual electricity production depends on sunlight, temperature, shading, cleanliness, orientation and system design.

4. Is the LONGi 640W Monofacial Solar Panel suitable for home use?

Yes, it can be used in residential solar installations when the available roof space, structural capacity, inverter limits and string configuration are suitable.

5. What is the warranty on the LONGi 640W solar panel?

It has a 15-year materials and processing warranty and a separate 30-year linear power output warranty. Applicable conditions should be confirmed before purchase.

6. What is the maximum system voltage of this LONGi solar panel?

The maximum system voltage is 1500V DC. The complete array must be designed within the inverter’s voltage limits and applicable electrical requirements.

7. Is the LONGi 640W panel suitable for commercial solar projects?

Its high rated output and module efficiency make it worth considering for commercial and industrial installations, provided the structural, electrical and space requirements are met.

Buy LONGi 640W Monofacial Solar Panel from Hajvery Solar Energy

Looking for a LONGi 640W Monofacial Solar Panel in Pakistan? Hajvery Solar Energy provides solar-product purchasing assistance for residential, commercial and industrial projects.

Before ordering, confirm the current price, availability, applicable warranty and required quantity. Our team can help you review the module specifications and identify important compatibility considerations for your solar installation.

Visit Hajvery Solar Energy at 280K Block J-1, Johar Town, Lahore, or contact the team for product and order enquiries.

For mor options, View LONGi Solar Panel In Pakistan.