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Thornova NRJ-W120SS 400W HJT Bifacial Solar Panel
Model NRJ-W120SS | Heterojunction (HJT) | 120 Half-Cut Cells | Bifacial | 1500V System Voltage
Product Overview
The Thornova NRJ-W120SS 400W HJT bifacial solar panel delivers high efficiency and reliable performance for modern systems. This advanced module uses heterojunction half-cut cell technology to achieve up to 22.0% efficiency with impressive bifacial gains. Energy production remains strong in weak light and high temperatures, so output stays consistent across seasons and climates. Rear-side power generation is enhanced by bifaciality above 90%, which increases yield on reflective surfaces. A robust dual-glass design and enhanced mechanical load rating support demanding residential, commercial and industrial installations. With a 20-year workmanship warranty and 30-year linear power warranty, long-term performance is strongly protected. This panel is ideal where space is limited, durability is critical and lifetime energy yield matters most.
Key Benefits
High power density: Up to 400W output in a compact footprint allows more energy from limited roof or ground space.
Excellent bifacial performance: Bifaciality above 90% unlocks strong rear-side generation and boosts system yield on reflective surfaces.
Reliable energy in real conditions: Outstanding weak light response and a very low temperature coefficient support higher output through the day.
Durable dual-glass construction: Front and back glass with enhanced mechanical load ratings improve resistance to snow, wind and long-term aging.
Long-term warranty protection: A 20-year product warranty and 30-year linear power warranty reduce risk and support project bankability.
Advanced cell and interconnect design: Super MBB and half-cut HJT cells limit losses, reduce LID and improve performance under shading and soiling.
How It Works
This bifacial HJT solar module converts sunlight into clean DC power using high efficiency heterojunction cells. Light enters through the anti-reflective front glass and passes into the 120 half-cut cells, where photons are captured by the advanced HJT junction structure. At the same time, additional light reflected from the ground or mounting surface strikes the rear glass and contributes extra current. Super multi-busbar wiring collects this current efficiently and reduces resistive losses across each cell string. The combined front and rear generation delivers higher yield than a comparable monofacial panel. Power then flows through the junction box and MC4 compatible connectors into your chosen inverter, where it is converted into usable AC electricity for onsite consumption or export to the grid.
HJT half-cut cell architecture: Heterojunction cells use thin amorphous layers on crystalline silicon to capture more light with lower losses. Half-cut layouts reduce current in each cell string, which lowers resistive heating and supports higher real-world efficiency.
Bifacial energy capture: Both the front and rear sides of the module remain active, so reflected and diffuse light contribute to output. On bright surfaces like light gravel, concrete or snow, rear-side gains significantly increase total energy harvest over the year.
Low temperature coefficient and weak light response: The panel maintains higher power at elevated temperatures due to its leading temperature coefficient of Pmax. Strong weak light performance ensures earlier morning startup, extended evening production and steadier generation under cloud cover.
Technical Specifications
| Model Series | NRJ-W120SS 375W / 380W / 385W / 390W / 395W / 400W |
| Maximum Power at STC (Pmax) | Up to 400W front side (STC) |
| Maximum Power at BSTC (Bifacial) | Up to 440W with rear-side contribution (BSTC) |
| Module Efficiency | 20.9% to 22.0% depending on power class |
| Cell Type and Size | 120 HJT half-cut cells, 166 x 83 mm |
| Bifaciality | 90% ± 5% |
| Open-Circuit Voltage Voc (400W) | 44.74 V at STC / 47.51 V at BSTC |
| Short-Circuit Current Isc (400W) | 10.74 A at STC / 11.65 A at BSTC |
| Voltage at Maximum Power Vmpp (400W) | 38.36 V at STC / 39.20 V at BSTC |
| Current at Maximum Power Impp (400W) | 10.44 A at STC / 11.28 A at BSTC |
| Operating Temperature Range | -40°C to +85°C module temperature |
| Nominal Operating Cell Temperature (NOCT) | 44°C ± 2°C |
| Maximum System Voltage | DC 1500V (IEC) |
| Maximum Series Fuse Rating | 20 A |
| Power Sorting | 0 to +5 W positive tolerance |
| Module Dimensions | 1755 x 1038 x 30 mm |
| Weight | 23.5 kg per module |
| Front Glass | 2.0 mm anti-reflective solar glass |
| Rear Glass | 2.0 mm white ceramic patterned PV glass |
| Frame Material | Anodised aluminum alloy |
| Encapsulant | POE encapsulant for enhanced durability |
| Junction Box Rating | IP67 / IP68 rated junction box |
| Output Cables | 4 mm² cables, 1200 mm length standard, customizable on request |
| Connector Type | MC4 compatible connectors |
| Front Static Load Rating | 5400 Pa snow load certified |
| Rear Static Load Rating | 2400 Pa wind load certified |
| Temperature Coefficient of Pmax | -0.26 % / °C |
| Temperature Coefficient of Voc | -0.24 % / °C |
| Temperature Coefficient of Isc | +0.04 % / °C |
| Safety Class | Class II module safety rating |
| Fire Rating | Class A fire performance rating |
| Container Loading (40') | 26 pallets, 36 modules per pallet, 936 modules per container |
Certifications & Compliance
Certifications: IEC safety and performance standards, Class A fire rating, Class II electrical safety, enhanced mechanical load testing for snow and wind.
Inverter Compatibility: Compatible with most modern string inverters and optimizers rated for 1500V DC systems when installed per manufacturer guidance.
Environmental: Designed for harsh outdoor conditions with dual-glass construction, POE encapsulation, IP67/IP68 junction box sealing and broad temperature tolerance.
Warranty: 20-year product workmanship warranty and 30-year linear power warranty, with first year output at 99% then 0.37% annual degradation up to year 30.
Documentation
Product Datasheet (PDF)● Available | Contact us for lead time and pricing
| SKU | PES-SPS-SOL-20951 |
|---|---|
| Manufacturer | PES Supply |
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