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A premium 640–670W back-contact (BC) solar panel with anti-glare glass and black frame — delivering up to 24.8% module efficiency, TaiRay wafer BC technology, and a 30-year linear power warranty for glare-sensitive and high-performance applications.
BC-Cell TaiRay
The LR7-72HVH uses LONGi's back-contact (BC) cell architecture with TaiRay wafer technology. Back-contact cells move all metal contacts to the rear surface of the cell, eliminating front-side busbar shading and maximising the active light-absorbing area. TaiRay wafer technology enhances high product reliability through improved crystal quality and reduced defect density. The result is a lower operating temperature compared to conventional front-contact cells, delivering more energy in hot climates and reducing thermal stress over the module's lifetime.
Up to 24.8% Efficiency
The 670W variant achieves 24.8% module efficiency — the highest in the LR7-72HVH series — enabled by the back-contact cell design that eliminates front-side shading losses entirely. The 144-cell (6×24) configuration across a 2382×1134mm module delivers peak power generation performance. With a power tolerance of 0~+3%, every module shipped meets or exceeds its rated power, ensuring predictable system yield and simplified string sizing for large commercial and utility-scale installations.
Anti-Glare Glass
The module uses high-transparency, low-reflection anti-glare coated 3.2mm tempered glass to enhance the anti-glare effect. This makes the LR7-72HVH-BGV suitable for glare-sensitive scenarios including airports, highways, residential households, and urban rooftops where conventional solar panels would cause unacceptable light reflection. The anti-glare coating maintains high light transmission to preserve module efficiency while significantly reducing specular reflection — meeting local planning requirements in glare-restricted zones.
≤ 0.35%/yr Degradation
LONGi backs the LR7-72HVH with a 30-year linear power output warranty, guaranteeing ≥ 88.85% of rated power at year 30. First-year power degradation is ≤ 1%, and years 2–30 degrade at ≤ 0.35%/year — better than the industry standard of 0.40–0.55%/year. The module is certified to withstand 5,400 Pa front-side and 2,400 Pa rear-side static loads, and passes the 25mm hailstone test at 23 m/s, ensuring long-term durability in the most demanding outdoor environments.
STC: AM1.5, 1,000 W/m², 25°C | NOCT: AM1.5, 800 W/m², 20°C, 1 m/s | Test uncertainty for Pmax: ±3%
| Parameter | 640M | 645M | 650M | 655M | 660M | 665M | 670M |
|---|---|---|---|---|---|---|---|
| STC Electrical Parameters | |||||||
| Pmax (W) | 640 | 645 | 650 | 655 | 660 | 665 | 670 |
| Efficiency (%) | 23.7 | 23.9 | 24.1 | 24.2 | 24.4 | 24.6 | 24.8 |
| Voc (V) | 53.70 | 53.80 | 53.90 | 54.00 | 54.10 | 54.20 | 54.30 |
| Isc (A) | 15.13 | 15.21 | 15.29 | 15.37 | 15.45 | 15.52 | 15.60 |
| Vmp (V) | 44.36 | 44.46 | 44.56 | 44.66 | 44.76 | 44.86 | 44.96 |
| Imp (A) | 14.43 | 14.51 | 14.59 | 14.67 | 14.75 | 14.83 | 14.91 |
| NOCT Electrical Parameters | |||||||
| Pmax (W) | 487 | 491 | 495 | 499 | 502 | 506 | 510 |
| Voc (V) | 51.04 | 51.13 | 51.23 | 51.32 | 51.42 | 51.51 | 51.61 |
| Isc (A) | 12.15 | 12.22 | 12.28 | 12.34 | 12.41 | 12.47 | 12.53 |
| Vmp (V) | 42.15 | 42.25 | 42.35 | 42.44 | 42.54 | 42.63 | 42.73 |
| Imp (A) | 11.56 | 11.63 | 11.69 | 11.76 | 11.82 | 11.88 | 11.94 |
| Temperature Coefficients & Ratings | |||||||
| Pmax Temp. Coeff. | −0.260% / °C | ||||||
| Voc Temp. Coeff. | −0.200% / °C | ||||||
| Isc Temp. Coeff. | +0.050% / °C | ||||||
| NOCT | 45 ± 2 °C | ||||||
| Power Tolerance | 0 ~ +3% | ||||||
| Mechanical Parameters | |||||||
| Cell Type | BC-Cell (Back Contact), 144 cells (6×24) | ||||||
| Module Dimensions | 2382 × 1134 × 30 mm | ||||||
| Weight | 28.5 kg | ||||||
| Glass | 3.2mm anti-glare coated tempered glass (single) | ||||||
| Frame | Anodised aluminium alloy (black) | ||||||
| Junction Box | IP68, three diodes | ||||||
| Output Cable | 4mm², (+) 400mm / (−) 200mm or ±1400mm customised | ||||||
| Application Conditions & Certifications | |||||||
| Max System Voltage | 1,500 V DC (IEC) | ||||||
| Max Series Fuse Rating | 25 A | ||||||
| Front / Rear Load | 5,400 Pa / 2,400 Pa | ||||||
| Hailstone Test | 25mm at 23 m/s | ||||||
| Operating Temperature | −40°C ~ +85°C | ||||||
| Protection Class | Class II | ||||||
| Fire Rating | IEC Class C | ||||||
| Product Warranty | 12 Years (Materials & Processing) | ||||||
| Power Warranty | 30 Years linear (≥ 88.85% at year 30, ≤ 0.35%/yr) | ||||||
| Packing: 36 pcs/pallet, 144 pcs/20'GP, 720 pcs/40'HC | First-year degradation ≤ 1% | LONGi reserves the right of final interpretation (20250324) | |||||||
All metal contacts on the rear surface eliminate front-side busbar shading, maximising active light-absorbing area and delivering lower operating temperature than conventional cells.
TaiRay wafer BC technology achieves up to 24.8% module efficiency — among the highest in the large-format 144-cell class — with 0~+3% positive power tolerance on every module.
High-transparency, low-reflection anti-glare coated glass reduces specular reflection for airports, highways, and residential areas — meeting glare-restricted planning requirements.
Best-in-class temperature coefficient — significantly better than standard N-type (−0.29%/°C) and P-type PERC (−0.35%/°C) — delivering more energy in hot climates.
Industry-leading degradation rate of ≤ 0.35%/year (years 2–30) guarantees ≥ 88.85% of rated power at year 30, maximising lifetime energy yield and project IRR.
Certified to 5,400 Pa front load, 2,400 Pa rear load, and 25mm hailstone at 23 m/s — suitable for high-wind, heavy-snow, and severe weather regions worldwide.
Our engineering team is available Mon – Fri 8:00am – 6:00pm CST. Emergency support 24/7.
