- At 23.5% efficiency, this panel is 0.6pp above typical N-type 700-750W modules (median: 22.9%)
- Power density of 235.0 W/m² packs 6.4 W/m² more into the same footprint vs N-type 700-750W median (228.6 W/m²)
- -0.24%/°C temperature coefficient (median: -0.29%/°C) - retains ~2% more power at high temperatures
- Weight of 37.0 kg is typical for N-type 700-750W panels
- Bifacial design (85% factor) captures reflected light - adds 4-13% yield on ground-mount or white roof
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Series TWMHF (66HD715–740W) 6 variants
The Tongwei TWMHF (66HD715-740W) series is designed to deliver maximum yield from every square meter – where power per module and accelerating project completion matter. The application of N-type cells in a half-cut architecture helps reduce resistive losses and better withstand partial shading, translating to a more stable performance in variable weather conditions.
Modules in this series utilize bifacial designs, enabling them to further harness reflected light from the ground – a tangible advantage on flat roofs, PV farms, and structures over light surfaces (e.g., light tiles, light screed). An additional benefit is low annual power degradation over the long term, facilitating energy production planning and improving investment bankability.
TWMHF 66HD is an excellent choice for installers and investors who wish to reduce the number of modules, simplify the logistical mounting, and maintain high string power without compromising reliability.
Electrical Parameters (STC)
| Nominal Power (Pmax) | 730 Wp |
| Module Efficiency | 23.50% |
| Voltage at Max Power (Vmpp) | 42.13 V |
| Current at Max Power (Impp) | 17.33 A |
| Open Circuit Voltage (Voc) | 50.46 V |
| Short Circuit Current (Isc) | 18.28 A |
| Max System Voltage | 1500 V |
Temperature Coefficients
| Temp. Coeff. Pmax | -0.240%/°C |
| Temp. Coeff. Voc | -0.220%/°C |
| Temp. Coeff. Isc | 0.040%/°C |
| NOCT | 44°C |
Cell Technology
| Cell Type | Monocrystalline |
| Cell Count | 132 |
| Bifacial | Yes |
| Bifaciality Factor | 85% |
Dimensions & Weight
| Length | 2384 mm |
| Width | 1303 mm |
| Height | 33 mm |
| Weight | 37.0 kg |
| Area | 3.11 m² |
| Power Density | 235.0 Wp/m² |
Warranty
| Product Warranty | 15 years |
| Performance Warranty | 30 years |
| End-of-Warranty Output | 88.1% |
| First Year Degradation | 1.00% |
| Annual Degradation | 0.38%/year |