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665Wp
AIKO AIKO-A665-MAH78Dw
AIKO Review

AIKO-A665-MAH78Dw

MonocrystallineBifacial
23.80%
Efficiency
237.9 Wp/m²
Power Density
-0.260%/°C
Temp. Coeff. Pmax chart
591W from 665W
Power after 30 years
  • Module efficiency of 23.8% is 0.6pp below average for Back Contact 650-700W panels (median: 24.4%)
  • At 237.9 W/m², this panel generates 5.9 W/m² less per unit area than Back Contact 650-700W median (243.8 W/m²)
  • At -0.26%/°C, hot weather performance is typical for Back Contact 650-700W panels
  • At 34.7 kg (1.7 kg above Back Contact 650-700W median of 33.0 kg), requires checking roof load capacity
  • Bifacial design (70% factor) captures reflected light - adds 4-10% yield on ground-mount or white roof
Performance Profile
Price Offers 0
Shop Country Price Price/kWp
Series Neostar 1U+ (Dual-Glass Module 655W-680W) 6 variants
Efficiency Range 23.4% - 24.3%
Avg. Efficiency 23.87%
Technology Back Contact
Dimensions 2465 × 1134 mm
Show series description

AIKO Neostar 1U+ (Dual-Glass Module 655W-680W) is designed for maximum yield from the same installation surface, while simultaneously simplifying the system design. The application of XBC technology with a front without classical busbars improves light usage and reduces shading losses, which is appreciated by investors in roof systems with seasonal shading elements. The dual-glass construction increases resistance to external conditions and operational stability over the long term, translating to lower warranty claim risks and smoother operation.

In practice, this series helps reduce equipment costs – thanks to the high power of a single module, it is easier to build an installation with the target power using fewer panels, thus requiring fewer connectors and terminals. For installers, resistance to micro-cracking is also important, as it minimizes losses during transportation and installation. Neostar 1U+ is a good choice for utility-scale PV farms, large commercial rooftops, and projects where low BOS (Balance of System) and predictable, long-term energy production are key.

Panels from the same series differ mainly in power output while having identical dimensions. Learn why →
Electrical Parameters (STC)
Nominal Power (Pmax)665 Wp
Module Efficiency23.80%
Voltage at Max Power (Vmpp)48.73 V
Current at Max Power (Impp)13.65 A
Open Circuit Voltage (Voc)58.86 V
Short Circuit Current (Isc)14.35 A
Max System Voltage1500 V
Temperature Coefficients
Temp. Coeff. Pmax-0.260%/°C
Temp. Coeff. Voc-0.220%/°C
Temp. Coeff. Isc0.050%/°C
NOCT-
Cell Technology
Cell TypeMonocrystalline
Cell Count156
BifacialYes
Bifaciality Factor70%
Dimensions & Weight
Length2465 mm
Width1134 mm
Height30 mm
Weight34.7 kg
Area2.80 m²
Power Density237.9 Wp/m²
Warranty
Product Warranty15 years
Performance Warranty30 years
End-of-Warranty Output88.8%
First Year Degradation1.00%
Annual Degradation0.35%/year
Key Specifications
23.80%
Efficiency
665 Wp
Power
-0.26%/°C
Temp Coeff
30 yrs
Warranty