JA Solar JAM66D45-620/LB n-type Double Glass Bifacial Module (620W)

Product Overview The JA Solar JAM66D45-620/LB is a high-efficiency n-type double glass bifacial solar module designed for superior performance in various installations. Featuring premium mono cells and bifacial technology, it achieves up to 23.0% efficiency at STC and enhanced power output with rear-side irradiation. Ideal for residential, commercial, or utility-scale projects, this module offers excellent durability, low degradation, and comprehensive certifications.

Key Features

• Bifacial Design: Captures sunlight from both sides, boosting energy yield by up to 10% or more depending on installation (e.g., 670W rated max power with 10% rear irradiation).
• High Efficiency: 23.0% module efficiency for maximum power in limited space.
• Durability: Double glass construction (2.0mm front/back) with IP68 junction box and Class II safety rating.
• Temperature Resilience: Operates from -40°F to 185°F with low temperature coefficients for consistent performance in extreme conditions.
• Warranty and Reliability: Low LID/LETID degradation, better low-irradiance response, and comprehensive certifications including IEC 61215, UL 61730, and ISO 9001.
• Fire Performance: UL Type 29/Class C.
• Bifaciality: 80% ± 5%.

Mechanical Specifications

• Cell Type: Mono
• Number of Cells: 132 (6 × 22)
• Weight: 73 lbs
• Dimensions: 93.78 ± 0.08 inches × 44.65 ± 0.08 inches × 1.18 ± 0.04 inches
• Cable Cross Section Size: 4mm² (IEC), 12 AWG (UL)
• Junction Box: IP68, 3 diodes
• Connector: QC 4.10-351 / MC4-EVO2A
• Cable Length (Including Connector): Portrait: 11.81 inches (+) / 15.75 inches (-); Landscape: 59.06 inches (+) / 59.06 inches (-)
• Front/Back Glass: 0.08 inches / 0.08 inches
• Packaging: 36 pcs per pallet, 720 pcs per 40HQ container
• Custom Options: Customized frame color and cable length available upon request

Electrical Specifications at STC (STC: Irradiance 1000W/m², cell temperature 77°F, AM1.5G)

• Rated Maximum Power (Pmax): 620W
• Open Circuit Voltage (Voc): 48.50V
• Maximum Power Voltage (Vmp): 40.21V
• Short Circuit Current (Isc): 16.13A
• Maximum Power Current (Imp): 15.42A
• Module Efficiency: 23.0%
• Power Tolerance: 0 to +3%
• Temperature Coefficient of Isc (α_Isc): +0.045%/°F
• Temperature Coefficient of Voc (β_Voc): -0.250%/°F
• Temperature Coefficient of Pmax (γ_Pmp): -0.290%/°F

Electrical Specifications with 10% Solar Irradiation Ratio (Rear/Front Irradiation Ratio: 10%)

• Rated Maximum Power (Pmax): 670W
• Open Circuit Voltage (Voc): 48.50V
• Maximum Power Voltage (Vmp): 40.21V
• Short Circuit Current (Isc): 17.42A
• Maximum Power Current (Imp): 16.65A

Operating Conditions

• Maximum System Voltage: 1500V DC
• Operating Temperature: -40°F to 185°F
• Maximum Series Fuse Rating: 35A
• Maximum Static Load, Front: 5400Pa (112 lb/ft²)
• Maximum Static Load, Back: 2400Pa (50 lb/ft²)
• NOCT: 113 ± 4°F
• Bifaciality: 80% ± 5%
• Safety Class: Class II
• Fire Performance: UL Type 29/Class C

Note: Electrical data is for comparison purposes and may vary slightly. For Nextracker installations, refer to the compatibility approval letter between JA Solar and Nextracker for maximum static loads. All specifications are subject to change; consult JA Solar for the latest details.