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Model TWMNF-66HD710W | N-Type TOPCon Half-Cell | 132 Cells | Bifacial Glass-Glass | 1500V System Voltage
The Tongwei Solar TWMNF-66HD710W N-type bifacial monocrystalline solar panel delivers very high power density for ground mount and rooftop projects. This advanced module combines 710 watt output with 22.9 percent efficiency, so more clean energy is generated from every square meter of roof or land. N-type TOPCon half-cells are used to reduce degradation, which protects returns over the full system lifetime. Its bifacial glass-glass design captures light from both sides, enhancing energy yield on reflective surfaces such as white roofs, concrete, or light gravel. Engineered for utility scale solar plants and demanding commercial and industrial sites, this panel operates safely up to 1500 volt system voltage. The robust frame, tempered glass, and IP68 junction box allow excellent reliability in harsh climates from minus 40 to plus 85 degrees Celsius. A 12 year product warranty and 30 year linear power warranty support long term performance and bankability. This combination of leading efficiency, long warranty coverage, and durable construction makes it an excellent choice for investors and installers seeking lower LCOE.
High power density for fewer modules: Each panel provides up to 710 watt peak output, so fewer modules are required for a given array size. This helps reduce racking, cabling, and installation time on large commercial roofs and ground mount systems.
Premium N-type TOPCon technology: N-type TOPCon cells offer low degradation and excellent temperature behavior during hot summers. Stable performance is maintained across decades, which protects long term project yield and improves bankability.
Bifacial glass-glass design: Energy is captured from front and rear surfaces when installed over reflective ground or roofing. This bifacial gain can increase total energy production without expanding the system footprint, supporting lower LCOE goals.
Long term reliability and warranties: The module carries a 12 year product warranty and a 30 year linear power output warranty with only 0.42 percent annual degradation. Output is warranted at 99 percent in year one and 87.4 percent by year thirty, which supports long horizon financial models.
Robust mechanics for harsh climates: Semi tempered glass on both sides, an anodized aluminium alloy frame, and IP68 junction box enable reliable operation in challenging environments. The panel is designed for high static loads and wide operating temperatures, supporting use in snow, wind, and desert regions.
Flexible applications from C&I to utility scale: The TWMNF-66HD710W suits commercial roofs, industrial facilities, and large utility scale plants. High voltage compatibility, standard cabling, and MC4 type connectors help streamline engineering and integration with modern string inverters.
This N-type bifacial solar panel converts sunlight into electricity using advanced monocrystalline half-cells. Incident light strikes the front glass, passes through the anti reflection coating, and is absorbed by high efficiency N-type TOPCon cells. Electrons are excited and guided through the cell structure, creating direct current power at the module terminals. Because this is a bifacial glass-glass design, additional light is harvested from the rear side that reflects from the roof or ground surface. The panel operates effectively within a temperature range of minus 40 to plus 85 degrees Celsius, supported by low thermal coefficients. When several modules are connected in series and parallel strings they feed DC power into a compatible string inverter. The inverter then converts that DC energy into AC electricity that can be used on site or exported to the grid. Over time, slow degradation occurs, but the linear warranty ensures predictable energy delivery across the thirty year performance period.
N-Type TOPCon half-cell architecture: The module uses 132 N-type TOPCon half-cells arranged in a six by twenty two layout. The half-cell layout reduces resistive losses and improves shade tolerance across the module surface.
Bifacial glass-glass energy capture: A 2.0 millimetre semi tempered glass sheet is installed on both front and rear sides. The front glass carries an anti reflection coating that improves light transmission, while the rear glass allows reflected and diffuse light to reach the cell rear surfaces.
Low temperature coefficients for stable output: The temperature coefficient of Pmax is only minus 0.28 percent per degree Celsius. As module temperature rises on hot days, power loss is therefore limited, which leads to more energy output over the year.
High voltage, high current operation: At standard test conditions the module delivers 40.69 volt at maximum power and 17.45 amp current. Open circuit voltage reaches 48.94 volt and short circuit current is 18.45 amp, allowing efficient string sizing for 1500 volt systems.
| Manufacturer / Brand | Tongwei Co., Ltd. (TW Solar) |
| Country of Origin | China |
| Model Number | TWMNF-66HD710W |
| Cell Type and Technology | Monocrystalline N-type TOPCon half-cell |
| Cell Count and Orientation | 132 cells (6 × 22 layout) |
| Module Type | N-type half-cell bifacial glass-glass module |
| Nominal Power Range | 705 Wp to 725 Wp series range |
| Maximum Power (Pmax) | 710 Wp at STC |
| Module Efficiency | 22.9 % (range 22.7 % to 23.3 % for series) |
| Power Tolerance | 0 ~ +3 % |
| Open Circuit Voltage (Voc) | 48.94 V |
| Short Circuit Current (Isc) | 18.45 A |
| Voltage at Maximum Power (Vmpp) | 40.69 V |
| Current at Maximum Power (Impp) | 17.45 A |
| Bifaciality Factor | 80 ± 5 % rear side relative to front |
| Temperature Coefficient of Pmax | -0.28 % / °C |
| Temperature Coefficient of Voc | -0.24 % / °C |
| Temperature Coefficient of Isc | +0.046 % / °C |
| Operating Temperature Range | -40 °C to +85 °C |
| Maximum System Voltage | 1500 V DC |
| Maximum Series Fuse Rating | 35 A |
| Degradation Rate and Output | 1st year 1 % loss, then 0.4 % per year, 99 % in year 1 and 87.4 % in year 30 |
| Panel Dimensions (H × W × D) | 2384 × 1303 × 33 mm |
| Weight | 37.9 kg |
| Front Glass | 2.0 mm semi tempered glass with anti reflection coating |
| Rear Glass | 2.0 mm semi tempered glass |
| Frame Material | Anodized aluminium alloy frame |
| Junction Box Protection and Diodes | IP68 junction box with 3 bypass diodes |
| Cable Cross Section | 4.0 mm² solar cable |
| Standard Cable Length | +400 mm, -200 mm or ±1400 mm, customizable |
| Typical Applications | Commercial and industrial rooftops, utility scale PV plants |
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, IEC 61215, IEC 61730, IEC TS 62804, IEC 61701, IEC 62716, IEC 60068-2-68.
Inverter Compatibility: Designed for 1500 V DC string systems and compatible with most modern three phase string and central inverters that support 1500 V module strings.
Environmental: Glass-glass bifacial construction with robust sealing for long field life in coastal, desert, and high humidity locations, with corrosion and ammonia resistance per relevant IEC standards.
Warranty: 12 year product and workmanship warranty plus 30 year linear power output warranty with 1 percent first year degradation and 0.4 percent annual degradation thereafter, guaranteeing 87.4 percent rated power at year thirty.
● Available | Contact us for lead time and pricing
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