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480Wp
JA Solar JAT54S40-480/LR
JA Solar Review

JAT54S40-480/LR

Monocrystalline
24.00%
Efficiency
240.2 Wp/m²
Power Density
-0.260%/°C
Temp. Coeff. Pmax chart
399W from 480W
Power after 30 years
  • At 24.0% efficiency, this panel is 1.5pp above typical TOPCon 450-500W modules (median: 22.5%)
  • At 240.2 W/m² power density, this panel generates 15.0 W/m² more per unit area than TOPCon 450-500W median (225.2 W/m²)
  • At -0.26%/°C (vs median -0.29%/°C), loses ~1% less power in hot conditions
  • 19.3 kg weight - 4.7 kg lighter than TOPCon 450-500W median (24.0 kg), reducing installation effort
  • In the top 2% for efficiency among all TOPCon panels
Performance Profile
Price Offers 0
Shop Country Price Price/kWp
Series JAT54S40 LR (n-type Monofacial Module) 6 variants
Efficiency Range 23.5% - 24.3%
Avg. Efficiency 23.77%
Technology TOPCon
Dimensions 1762 × 1134 mm
Show series description

JA Solar JAT54S40 LR series modules are monofacial solar panels based on N-type TOPCon cells, designed for stable energy production in real rooftop conditions. The key advantage is their very low LID degradation, ensuring the installation maintains high efficiency for a longer period without the typical drop-off after commissioning. In practice, this means more predictable yields and better profitability throughout the system's lifespan.

Another notable feature is the improved temperature coefficient, which minimizes power losses on hot days – particularly important for dark rooftops and installations with poor ventilation. The modules utilize the GFI (gapless) structure, supporting efficient surface utilization and an aesthetic appearance. An additional benefit is optimized performance under low-light conditions, which aids during transitional periods and light cloud cover.

This is an excellent choice for single-family homes, multi-family buildings, and commercial projects, where durability, reliable performance, and high workmanship standards matter.

Panels from the same series differ mainly in power output while having identical dimensions. Learn why →
Electrical Parameters (STC)
Nominal Power (Pmax)480 Wp
Module Efficiency24.00%
Voltage at Max Power (Vmpp)35.00 V
Current at Max Power (Impp)13.72 A
Open Circuit Voltage (Voc)41.10 V
Short Circuit Current (Isc)14.96 A
Max System Voltage1500 V
Temperature Coefficients
Temp. Coeff. Pmax-0.260%/°C
Temp. Coeff. Voc-0.220%/°C
Temp. Coeff. Isc0.050%/°C
NOCT45°C
Cell Technology
Cell TypeMonocrystalline
Cell Count108
BifacialNo
Bifaciality Factor-
Dimensions & Weight
Length1762 mm
Width1134 mm
Height30 mm
Weight19.3 kg
Area2.00 m²
Power Density240.2 Wp/m²
Warranty
Product Warranty15 years
Performance Warranty30 years
End-of-Warranty Output83.5%
First Year Degradation1.00%
Annual Degradation0.55%/year
Key Specifications
24.00%
Efficiency
480 Wp
Power
-0.26%/°C
Temp Coeff
30 yrs
Warranty