Description
Devsol 740 Watt HDT Solar Panel – Advanced HJT Bifacial Module
The Devsol 740 Watt HDT Solar Panel is a high-output, N-Type bifacial solar module manufactured by Nexus Solar Energy Pvt Ltd under the Devsol brand. Built on advanced HDT (Heterojunction Dual-side Technology), this 740W glass-glass solar panel delivers 23.8% module efficiency with a robust dual-glass construction designed for residential, commercial, industrial and large-scale solar projects across India.
HDT is an Advanced HJT-based dual-side solar architecture engineered to optimise front- and rear-side optical response, surface passivation, current collection, bifacial energy yield and module-level performance. It is built on N-Type HJT (Heterojunction Technology) — a globally recognised advanced cell architecture that combines crystalline silicon with amorphous silicon layers to achieve higher efficiency, lower temperature losses and superior long-term performance compared to conventional P-Type Mono PERC panels.
The Devsol 740W HDT module uses 132 N-Type HJT cells in a 6×11 + 6×11 half-cut configuration, delivering a rated maximum power of 740 Wp at Standard Test Conditions. Its open-circuit voltage (Voc) is 50.47V, short-circuit current (Isc) is 18.56A, maximum power voltage (Vmpp) is 42.32V and maximum power current (Impp) is 17.50A.
740W HDT Solar Panel Key Features
- 740W rated front-side power output for high-output rooftop and project installations
- 23.8% module efficiency at Standard Test Conditions (STC)
- Advanced N-Type HJT cell technology in the HDT Advanced HJT dual-side architecture
- Bifacial glass-glass design with 90±5% bifacial factor for dual-side energy generation
- 132-cell half-cut configuration (6×11 + 6×11) for reduced internal losses
- Low temperature coefficient of Pmax: -0.24%/°C for better performance in Indian heat
- 0 to +3% positive power tolerance — guaranteed minimum rated output
- Anti-LID and anti-PID characteristics with no B-O induced light-induced degradation
- 1500V DC maximum system voltage for large-scale string configurations
- IP68 junction box with 3 Schottky bypass diodes for enhanced safety
- 5400 Pa front / 2400 Pa rear mechanical load rating for demanding installation environments
- Glass-glass construction with 2.0mm front AR-coated and 2.0mm rear heat-strengthened glass
- 15-year product warranty and 35-year linear performance warranty
Devsol 740 Watt HDT Technical Specifications
| Specification | Devsol 740W HDT |
|---|---|
| Rated Maximum Power (Pmax) | 740 Wp |
| Module Efficiency | 23.8% |
| Open Circuit Voltage (Voc) | 50.47 V |
| Short Circuit Current (Isc) | 18.56 A |
| Maximum Power Voltage (Vmpp) | 42.32 V |
| Maximum Power Current (Impp) | 17.50 A |
| Power Tolerance | 0 to +3% |
| Cell Technology | N-Type HJT (HDT) |
| Cell Configuration | 132 cells (6×11 + 6×11) |
| Bifacial Factor | 90±5% |
| Module Dimensions | 2384 × 1303 × 33 mm |
| Weight | 37.5 kg |
| Front Glass | 2.0 mm High-Transmission AR-Coated Heat-Strengthened Glass |
| Rear Glass | 2.0 mm Heat-Strengthened Glass |
| Frame | Anodized Aluminium Alloy |
| Junction Box | IP68, 1500V DC, 3 Schottky Bypass Diodes |
| Cable | 4.0 mm² |
| Maximum Mechanical Test Load | 5400 Pa front / 2400 Pa rear |
| NMOT | 43°C ± 2°C |
| Temperature Coefficient Voc | -0.22%/°C |
| Temperature Coefficient Isc | +0.047%/°C |
| Temperature Coefficient Pmax | -0.24%/°C |
| Operating Temperature | -40°C to +85°C |
| Maximum System Voltage | 1500 V DC |
| Maximum Series Fuse | 35 A |
| Limiting Reverse Current | 35 A |
Why Advanced HJT Technology Matters in Indian Conditions
India’s climate presents a specific challenge for solar panels. During peak summer months, rooftop temperatures regularly exceed 50°C, and the silicon cells inside a solar module operate at even higher temperatures. Every solar panel loses output as it gets hotter — this is measured by the temperature coefficient of Pmax.
The Devsol 740W HDT panel has a temperature coefficient of Pmax at -0.24%/°C. This means for every 1°C rise in cell temperature above 25°C (the standard test condition), the panel loses approximately 0.24% of its rated power. In practical terms, this is a lower rate of heat-related power loss compared to many conventional panels, which is particularly relevant during Indian summers when electricity consumption and tariff rates are at their highest.
The N-Type HJT cell platform within the HDT Advanced HJT dual-side architecture achieves this through its heterojunction structure — ultra-thin amorphous silicon layers on both sides of the N-type crystalline silicon wafer create a highly passivated cell with reduced recombination losses. The result is higher open-circuit voltage, better temperature behaviour and slower degradation over the panel’s 35-year performance warranty period.
Bifacial Glass-Glass Solar Panel
The Devsol 740W HDT is a bifacial glass-glass solar panel, meaning it is designed to capture sunlight from both the front and rear surfaces. The front surface receives direct sunlight, while the rear surface captures reflected and diffuse light from the surface beneath the panel.
The datasheet specifies a bifacial factor of 90±5%, which represents the ratio of rear-side to front-side power under standard test conditions. However, the actual rear-side energy gain in a real installation depends on several factors:
- Mounting height — the distance between the panel rear surface and the roof or ground
- Tilt angle — the orientation of the panel relative to the ground
- Surface reflectivity (albedo) — light-coloured concrete or white membrane roofs provide the highest reflectivity
- Installation structure — the mounting system should not shade the rear surface excessively
- Site conditions — surrounding structures, vegetation and ground colour all affect rear irradiance
The 2.0mm front AR-coated heat-strengthened glass and 2.0mm rear heat-strengthened glass create a durable dual-glass module. Glass-glass construction offers advantages in terms of moisture resistance, mechanical durability and reduced potential-induced degradation (PID) compared to conventional glass-backsheet designs.
740W HDT Solar Panel for Commercial and Industrial Projects
With a rated output of 740 watts from a single module measuring 2384 × 1303 mm, the Devsol 740W HDT panel is designed for applications where high power density from limited roof or ground area is important:
- Industrial rooftop solar installations — factories, warehouses and large commercial buildings with significant electricity consumption
- Commercial rooftop projects — offices, shopping centres, hotels and institutional buildings
- EPC (Engineering, Procurement and Construction) projects — large-scale solar plant development
- Open ground-mount solar arrays — where ample area allows optimal tilt and rear-side irradiance
- High power-density projects — installations where maximum output per square metre is required
The 1500V DC maximum system voltage allows longer string configurations, reducing wiring costs and inverter input requirements for large installations. The IP68 junction box and 5400 Pa / 2400 Pa mechanical load ratings provide the durability required for commercial and industrial environments.
Note: For residential installations, the physical dimensions (2384 × 1303 mm) and weight (37.5 kg) of the 740W module should be evaluated against available roof space, structural capacity and handling requirements. A professional site assessment is recommended before selecting this wattage class for any installation.
HDT vs Conventional Solar Panel
The primary differences between the Devsol 740W HDT panel and conventional P-Type Mono PERC solar panels lie in cell architecture, temperature behaviour and long-term degradation:
| Feature | Devsol 740W HDT (N-Type HJT) | Conventional P-Type Mono PERC |
|---|---|---|
| Cell Technology | N-Type Heterojunction (HJT) | P-Type Mono PERC |
| Temperature Coefficient (Pmax) | -0.24%/°C | Typically -0.35%/°C to -0.40%/°C |
| Bifacial Capability | Yes, glass-glass bifacial | Some models available, typically lower bifacial factor |
| LID (Light-Induced Degradation) | No B-O induced LID | Subject to B-O induced LID in early operation |
| Performance Warranty | 35-year linear performance warranty | Typically 25-year performance warranty |
| Annual Degradation | 0.3% per year | Typically 0.5% to 0.55% per year |
| Construction | Glass-glass | Glass-backsheet (typically) |
The practical advantage of the lower -0.24%/°C temperature coefficient is most visible during peak summer months when cell temperatures routinely exceed 65°C on Indian rooftops. At these temperatures, the HDT panel retains a higher percentage of its rated output compared to panels with a higher negative coefficient.
Certification and Manufacturing
| Brand | Devsol |
| Manufacturer | Nexus Solar Energy Pvt Ltd |
| BIS Licence No. | R-93046086 |
| Primary Standard | IS 14286 (Part 1/Sec 1):2023 |
| Additional Standards | IEC 61215-1-1:2021, IS/IEC 61730-1 & 61730-2:2023 |
| Category | Crystalline Silicon Terrestrial Photovoltaic (PV) Modules |
| Licence Holder | Nexus Solar Energy Pvt Ltd, Bulandshahr, Uttar Pradesh |
| Manufacturing Facility | G.T. Road, Chola Industrial Area, Shahpur Kalan, Bulandshahr, UP – 203202 |
BIS Licence No. R-93046086 is registered under IS 14286 (Part 1/Sec 1):2023 for crystalline silicon terrestrial photovoltaic modules. The licence covers models across the Devsol solar panel range manufactured by Nexus Solar Energy Pvt Ltd. For verification, the licence number can be checked on the BIS website (https://www.bis.gov.in).
Frequently Asked Questions About Devsol 740 Watt HDT Solar Panel
What is the Devsol 740 Watt HDT Solar Panel?
The Devsol 740 Watt HDT Solar Panel is a high-output N-Type bifacial solar module manufactured by Nexus Solar Energy Pvt Ltd. It uses advanced HDT (Heterojunction Dual-side Technology) based on N-Type HJT cells, delivering 740W rated power with 23.8% module efficiency in a glass-glass bifacial construction.
What is HDT solar panel technology?
HDT stands for Heterojunction Dual-side Technology. It is an Advanced HJT-based dual-side solar architecture engineered to optimise front- and rear-side optical response, surface passivation, current collection, bifacial energy yield and module-level performance. HDT is built on advanced N-Type HJT (Heterojunction Technology), which combines crystalline silicon with amorphous silicon layers for higher efficiency and better temperature performance.
Is HDT the same as HJT?
HDT is built on HJT. HJT (Heterojunction Technology) is the globally recognised N-type cell platform, and HDT (Heterojunction Dual-side Technology) is the Advanced HJT-based dual-side architecture built on it — engineered to optimise front- and rear-side optical response, surface passivation, current collection, bifacial energy yield and module-level performance. Compare HDT on bifaciality, module efficiency, temperature coefficient, power density and long-term degradation rather than on cell type alone.
What is the efficiency of the Devsol 740W HDT panel?
The Devsol 740W HDT panel has a module efficiency of 23.8% at Standard Test Conditions (STC).
Is the Devsol 740 Watt HDT panel bifacial?
Yes. The Devsol 740W HDT is a bifacial glass-glass solar panel with a specified bifacial factor of 90±5%. It is designed to capture solar energy from both front and rear surfaces, with actual rear-side gain depending on installation conditions such as mounting height, surface reflectivity and tilt angle.
What is the voltage of the 740W solar panel?
At STC, the Devsol 740W HDT panel has an open-circuit voltage (Voc) of 50.47V and a maximum power voltage (Vmpp) of 42.32V.
What is the current of the 740W solar panel?
At STC, the Devsol 740W HDT panel has a short-circuit current (Isc) of 18.56A and a maximum power current (Impp) of 17.50A.
What is the size of the Devsol 740W solar panel?
The Devsol 740W HDT panel measures 2384 × 1303 × 33 mm and weighs 37.5 kg.
What is the weight of the Devsol 740W solar panel?
The Devsol 740W HDT panel weighs 37.5 kg.
Is the Devsol 740W HDT panel BIS registered?
Nexus Solar Energy holds BIS Licence No. R-93046086 under IS 14286 (Part 1/Sec 1):2023 for crystalline silicon terrestrial photovoltaic modules. The licence covers models in the Devsol solar panel range. For specific model-level verification, the BIS licence can be checked at https://www.bis.gov.in.
Who manufactures the Devsol 740 Watt HDT Solar Panel?
The Devsol 740 Watt HDT Solar Panel is manufactured by Nexus Solar Energy Pvt Ltd, based in Bulandshahr, Uttar Pradesh, India.
Is the 740W HDT panel suitable for commercial solar projects?
Yes. The Devsol 740W HDT panel is designed for commercial rooftops, industrial rooftop installations, EPC projects and large-scale solar plants where high power density from limited area is required. The 1500V DC system voltage supports large string configurations suitable for commercial-scale inverters.
What is the maximum system voltage of the Devsol 740W HDT panel?
The Devsol 740W HDT panel is rated for a maximum system voltage of 1500V DC.
What is the temperature coefficient of Pmax?
The temperature coefficient of Pmax for the Devsol 740W HDT panel is -0.24%/°C. This means the panel loses approximately 0.24% of its rated power for every 1°C increase in cell temperature above 25°C.
What warranty does the Devsol 740W HDT panel carry?
The Devsol 740W HDT panel carries a 15-year product warranty covering manufacturing defects and a 35-year linear performance warranty. The performance warranty guarantees 90.3% of rated power output at year 35, with an annual degradation rate of 0.3%.
How does the Devsol 740W HDT panel compare to conventional solar panels?
The Devsol 740W HDT panel uses N-Type HJT technology, which provides a lower temperature coefficient (-0.24%/°C vs typically -0.35%/°C to -0.40%/°C for P-Type Mono PERC), no light-induced degradation from boron-oxygen defects, a longer 35-year performance warranty and bifacial glass-glass construction. These characteristics are particularly relevant for Indian conditions where high temperatures significantly affect solar panel output.
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Devsol 740 Watt HDT Solar Panel – Advanced HJT Bifacial Module
Devsol 740 Watt HDT Solar Panel by Nexus Solar Energy features advanced N-Type HJT bifacial glass-glass technology, 23.8% module efficiency, 1500V DC system rating and 35-year performance warranty. Explore full specifications and pricing.
Product SKU: DEV-HDT-740-BDG
Product Brand: DEVSOL
Product Currency: inr
Product Price: 21756
Product In-Stock: InStock
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