JA Solar JAM72D42-640/LB 640W N-Type TOPCon Bifacial Double Glass Solar Panel

The JA Solar JAM72D42-640/LB is a premium 640W N-Type TOPCon bifacial double glass solar panel from JA Solar's DeepBlue 4.0 series. Designed for large-scale commercial and utility PV installations, it delivers outstanding efficiency and long-term reliability.

Key Features

• 640W peak output — high-power module for maximum energy yield per installation
• N-Type TOPCon technology — superior efficiency and lower degradation than PERC
• Bifacial double glass — generates power from both sides, boosting yield by up to 30% in optimal conditions
• 22.9% module efficiency — one of the highest available in its class
• Low degradation — only 1% in year 1, then 0.4% annually over 30 years
• 1500V system voltage — compatible with utility-scale string inverter configurations
• IEC 61215 & IEC 61730 certified — ISO 9001, ISO 14001, ISO 45001 quality assured

Electrical Specifications (STC)

• Peak Power (Pmax): 640W
• Module Efficiency: 22.9%
• Open Circuit Voltage (Voc): 38.8V
• Short Circuit Current (Isc): 21.01A
• Max Power Voltage (Vmp): 32.7V
• Max Power Current (Imp): 19.59A
• Temperature Coefficient (Pmax): -0.29%/°C
• Max System Voltage: 1500V DC

Mechanical Specifications

• Dimensions: 2465 × 1134 × 30mm
• Weight: 34.6kg
• Cell Type: N-Type TOPCon, 72 cells (182mm × 197mm)
• Glass: Double glass, 2mm front & back
• Frame: Anodised aluminium alloy
• Connector: MC4 compatible

Warranty

• Product warranty: 12 years
• Power warranty: 30 years (99% in year 1, 87.4% at year 30)