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590Wp
JA Solar JAM66D42-590/MB
JA Solar Review

JAM66D42-590/MB

MonocrystallineBifacial
22.80%
Efficiency
228.4 Wp/m²
Power Density
-0.290%/°C
Temp. Coeff. Pmax chart
516W from 590W
Power after 30 years
  • At 22.8% efficiency, this panel is on par with typical TOPCon 550-600W modules
  • 228.4 W/m² power density - 4.0 W/m² more than TOPCon 550-600W median (224.4 W/m²), more power per roof area
  • Temperature coefficient of -0.29%/°C matches the TOPCon 550-600W median
  • Bifacial design (80% factor) captures reflected light - adds 4-12% yield on ground-mount or white roof
  • Ranked #2110 out of 11672 panels for efficiency in the database
Performance Profile
Price Offers 0
Shop Country Price Price/kWp
Series JAM66D42 MB 6 variants
Efficiency Range 22.5% - 23.4%
Avg. Efficiency 22.92%
Technology TOPCon
Dimensions 2278 × 1134 mm
Show series description

JA Solar JAM66D42 MB series modules are designed for installations where high energy yield from the same surface area and stable performance over years are crucial – especially for commercial rooftops and utility-scale PV farms. These modules feature N-type TOPCon cells, which maintain their parameters better in the long term and are less susceptible to typical operational losses, effectively mitigating the risk of disappointment with production after several seasons. The double glass construction enhances resistance to environmental conditions and improves laminate durability, which is vital for projects with a long payback period. Thanks to bifacial technology, the module can utilize reflected light from the ground, boosting energy yield where every percentage point counts. The semi-lattice design supports better tolerance to partial shading and minimizes connection losses, while the refined cell architecture aids performance under lower irradiance. This is an excellent choice for investors, EPC contractors, and companies optimizing LCOE who seek advantages over standard P-type PERC modules.

Panels from the same series differ mainly in power output while having identical dimensions. Learn why →
Electrical Parameters (STC)
Nominal Power (Pmax)590 Wp
Module Efficiency22.80%
Voltage at Max Power (Vmpp)40.84 V
Current at Max Power (Impp)14.45 A
Open Circuit Voltage (Voc)48.58 V
Short Circuit Current (Isc)15.31 A
Max System Voltage1500 V
Temperature Coefficients
Temp. Coeff. Pmax-0.290%/°C
Temp. Coeff. Voc-0.250%/°C
Temp. Coeff. Isc0.045%/°C
NOCT45°C
Cell Technology
Cell TypeMonocrystalline
Cell Count132
BifacialYes
Bifaciality Factor80%
Dimensions & Weight
Length2278 mm
Width1134 mm
Height30 mm
Weight31.8 kg
Area2.58 m²
Power Density228.4 Wp/m²
Warranty
Product Warranty12 years
Performance Warranty30 years
End-of-Warranty Output87.4%
First Year Degradation1.00%
Annual Degradation0.40%/year
Key Specifications
22.80%
Efficiency
590 Wp
Power
-0.29%/°C
Temp Coeff
30 yrs
Warranty