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640Wp
Q-SUN Solar Review

QN-640HJT-01

MonocrystallineBifacial
22.60%
Efficiency
226.1 Wp/m²
Power Density
-0.240%/°C
Temp. Coeff. Pmax chart
559W from 640W
Power after 30 years
  • At 22.6% efficiency, this panel is on par with typical N-type 600-650W modules
  • At 226.1 W/m² power density, roof space requirements are typical for N-type 600-650W panels
  • At -0.24%/°C (vs median -0.29%/°C), loses ~2% less power in hot conditions
  • At 35.5 kg (3.0 kg above N-type 600-650W median of 32.5 kg), requires checking roof load capacity
  • Bifaciality factor of 80% can add 4-12% extra yield with reflective mounting surface
Performance Profile
Price Offers 0
Shop Country Price Price/kWp
Series Qrystal Max N12 (N-type) 640–670W 7 variants
Efficiency Range 22.6% - 23.7%
Avg. Efficiency 23.14%
Technology N-type
Dimensions 2172 × 1303 mm
Show series description

The Q-SUN Solar Qrystal Max N12 (N-type) 640-670W series is designed for maximum energy yield on limited space – where every square meter counts. The use of N-type cells helps minimize typical power losses over time and maintain the stable operation of the system for many years, which realistically improves the return on investment. The modules utilize bifacial technology, allowing them to also generate power from reflected light, which is particularly beneficial on bright roofs, membranes, and ground-mounted structures.

The TOPCon architecture is also noteworthy, as it supports high efficiency under variable solar conditions – which is important given the typical Polish weather, frequent cloud cover, and morning or afternoon shadows. The series is a good choice for PV farms, large industrial rooftops, and commercial projects, where a high yield and predictable production are the priority. It distinguishes itself from the competition through the combination of N-type, bifacial, and TOPCon technology in the high-power segment, which is focused on achieving a better energy balance throughout the entire lifespan of the system.

Panels from the same series differ mainly in power output while having identical dimensions. Learn why →
Electrical Parameters (STC)
Nominal Power (Pmax)640 Wp
Module Efficiency22.60%
Voltage at Max Power (Vmpp)38.60 V
Current at Max Power (Impp)16.58 A
Open Circuit Voltage (Voc)46.09 V
Short Circuit Current (Isc)17.33 A
Max System Voltage1500 V
Temperature Coefficients
Temp. Coeff. Pmax-0.240%/°C
Temp. Coeff. Voc-0.240%/°C
Temp. Coeff. Isc0.040%/°C
NOCT43°C
Cell Technology
Cell TypeMonocrystalline
Cell Count120
BifacialYes
Bifaciality Factor80%
Dimensions & Weight
Length2172 mm
Width1303 mm
Height35 mm
Weight35.5 kg
Area2.83 m²
Power Density226.1 Wp/m²
Warranty
Product Warranty15 years
Performance Warranty30 years
End-of-Warranty Output90.3%
First Year Degradation1.00%
Annual Degradation0.40%/year
Key Specifications
22.60%
Efficiency
640 Wp
Power
-0.24%/°C
Temp Coeff
30 yrs
Warranty