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Model TWMNF-66HD720W | N-Type TOPCon Half-Cell | 132 Half-Cell | Bifacial Glass-Glass | 1500V System Voltage
The Tongwei Solar TWMNF-66HD720W N-type bifacial monocrystalline solar panel delivers high power density for modern commercial and utility plants. With a rated maximum output of 720 W and module efficiency up to 23.2%, it is engineered to extract more energy from each square meter of roof or ground space. N-type TOPCon half-cells are combined with a robust dual-glass, bifacial design that captures light from both front and rear sides. This approach supports higher yields on reflective surfaces such as white roofs, light gravel, concrete or snow. A low temperature coefficient of power helps the module maintain performance in hot climates and during peak irradiance hours. The glass‑glass build, anodized aluminum frame and IP68 junction box offer long-term durability in harsh environments, including coastal and dusty regions. Backed by a 12‑year product warranty and a 30‑year linear power output warranty, this panel is suited for C&I rooftops and utility‑scale solar plants seeking bankable, long‑life energy production.
High power density: A 720 W output and up to 23.2% efficiency allow more energy from fewer modules, helping reduce racking, cabling and installation time per kilowatt installed.
Advanced N-type TOPCon cells: N-type TOPCon half-cells offer lower degradation and better low-light response than many conventional P-type modules, supporting stable production over the full project life.
Bifacial glass-glass design: Dual glass and up to 80±5% bifaciality enable rear-side gain on reflective ground or roof surfaces, improving specific energy yield without increasing array footprint.
Robust performance in extreme climates: A power temperature coefficient of -0.28%/°C, operating range from -40°C to 85°C and wind and snow load ratings up to 5,400 Pa support reliable output in hot, cold and high-wind regions.
Long-term bankable warranty: A 12-year material and workmanship warranty is paired with a 30-year linear power warranty, with 99% output in year one and 87.4% expected at year 30, supporting project bankability.
This N-type bifacial solar module converts sunlight into clean DC electricity using advanced TOPCon monocrystalline cells. Each half-cell is wired in an optimized layout that reduces resistive losses, improves shade tolerance and lowers operating temperatures. The module harvests light on both sides through its glass-glass construction, so energy is captured from direct irradiation and reflected or diffuse light. When stringed together, panels feed DC power to an inverter that converts it into AC electricity for on-site use or export to the grid. The low degradation profile and stable temperature behavior help system owners forecast yield and calculate levelized cost of energy more accurately. This makes the module an efficient building block for commercial rooftops, carports, agrivoltaic systems and utility-scale solar farms.
N-type TOPCon half-cell conversion: High-efficiency N-type TOPCon cells use a passivated contact structure that limits recombination losses. This design helps deliver higher efficiency and better low-light performance compared with many PERC-based alternatives.
Bifacial glass-glass energy capture: Front 2.0 mm AR-coated semi-tempered glass maximizes direct irradiance capture, while rear 2.0 mm glass collects reflected light from the ground or roof. When installed over bright surfaces at suitable tilt and height, rear-side gain can significantly boost annual energy yield.
System integration and protection: A 1500 V DC system voltage rating supports long strings and lowers BOS costs in large plants. The IP68 junction box with three bypass diodes helps protect the module under partial shading and damp conditions, while an anodized aluminum frame and dual-glass build enhance mechanical strength and reduce long-term moisture ingress.
| Brand / Manufacturer | Tongwei Co., Ltd. (TW Solar), China |
| Model Number | TWMNF-66HD720W |
| Technology / Cell Type | N-type TOPCon monocrystalline, half-cell, bifacial glass-glass module |
| Power Range | 705 Wp to 725 Wp (nominal 720 Wp) |
| Maximum Power (Pmax) | 720 Wp at STC |
| Module Efficiency | 23.2% typical (22.7% – 23.3% range) |
| Power Tolerance | 0 to +3% |
| Voltage at Maximum Power (Vmpp) | 41.03 V |
| Current at Maximum Power (Impp) | 17.55 A |
| Open-Circuit Voltage (Voc) | 49.28 V |
| Short-Circuit Current (Isc) | 18.55 A |
| Bifaciality | 80 ± 5% rear-side relative to front |
| Operating Temperature Range | -40°C to +85°C |
| Temperature Coefficient of Pmax | -0.28% / °C |
| Temperature Coefficient of Voc | -0.24% / °C |
| Temperature Coefficient of Isc | +0.046% / °C |
| Maximum System Voltage | 1500 V DC |
| Maximum Series Fuse Rating | 35 A |
| Product Type / Application | C&I rooftops and utility-scale PV plants |
| Panel Dimensions (H × W × D) | 2384 × 1303 × 33 mm |
| Weight | 37.9 kg |
| Cell Configuration | 132 cells (6 × 22) half-cell layout |
| Front Glass | 2.0 mm AR-coated semi-tempered glass |
| Rear Glass | 2.0 mm semi-tempered glass |
| Frame Type | Anodized aluminum alloy frame |
| Junction Box | IP68 protection, 3 bypass diodes |
| Cable Cross-Section | 4.0 mm² solar cable |
| Cable Length | ±1400 mm (other lengths configurable by manufacturer) |
| Static Load Rating | 5,400 Pa front, 2,400 Pa rear (test load) |
| Packaging | 33 modules per pallet, 594 modules per 40'HC container |
Certifications: ISO 9001:2015 Quality Management, ISO 14001:2015 Environmental Management, ISO 45001:2018 Occupational Health and Safety, ISO 50001:2018 Energy Management, EC 62941:2019 PV Module Manufacturing Quality System, IEC 61215, IEC 61730, IEC TS 62804, IEC 61701, IEC 62716, IEC 60068-2-68.
Inverter Compatibility: Designed for modern 1500 V string and central inverters; compatible with leading C&I and utility-scale inverter brands when string and voltage limits are respected.
Environmental: Dual-glass construction, IP68 junction box and corrosion-resistant materials support reliable operation in coastal, desert and high-humidity environments when installed to manufacturer guidelines.
Warranty: 12-year material and workmanship warranty plus 30-year linear power output warranty with 1% maximum degradation in year one and a 0.4% annual degradation rate thereafter, targeting 87.4% of initial power at year 30.
● Available | Contact us for lead time and pricing
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