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HiS-T640NJ vs HiN-T440NF(BK) 8 of 19 identical Swap Change panels

Hyundai HiS-T640NJ vs Hyundai HiN-T440NF(BK)

HiS-T640NJ
640 Wp 22.90 % TOPCon Bifacial
Open panel page Datasheet PDF
VS
Hyundai HiN-T440NF(BK)
HiN-T440NF(BK)
440 Wp 22.53 % TOPCon Bifacial
Open panel page Datasheet PDF
The verdict

11 differences, and they point both ways

The largest is rated power: 200 W more power. 8 of 19 comparable parameters are identical.

See all 11 differences
How alike are they
8 of 19 comparable
parameters are identical
identical differs
01

What actually differs

11 of 19 parameters
Parameter HiS-T640NJ HiN-T440NF(BK) Difference
Rated power 640 Wp 440 Wp 200 W more power
Weight 34.7 kg 24.5 kg 10.2 kg lighter
Product warranty 12 yrs 25 yrs 13 yrs longer
Module efficiency 22.90 % 22.53 % 0.37 pp more efficient
Open-circuit voltage 57.77 V 38.80 V 18.97 V apart
Module area 2.795 m² 1.953 m² 0.843 m² apart
Temperature coefficient -0.290 %/°C -0.300 %/°C 0.010 %/°C better in heat
Power density 229.0 Wp/m² 225.3 Wp/m² 3.6 Wp/m² higher
Voltage at max power 47.74 V 32.30 V 15.44 V apart
Cell count 156 108 48 cells apart
Dimensions 2465x1134x30 mm 1722x1134x30 mm 2465x1134x30 mm vs 1722x1134x30 mm
02

What it means on a roof

Thirty years of production
Each panel's own declared degradation curve, at 1,200 kWh/kWp a year
HiS-T640NJ
21,473 kWh
HiN-T440NF(BK)
14,763 kWh
Lifetime gap
6,710 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario HiS-T640NJ HiN-T440NF(BK)
Standard test conditions 25 °C 100.0% of rated power 640 W 440 W
Cool, bright day 40 °C 95.5% of rated power 612 W 420 W
Typical summer roof 55 °C 91.0% of rated power 584 W 400 W
Hot roof 70 °C 86.5% of rated power 556 W 381 W
03

Full specification

Parameter HiS-T640NJ HiN-T440NF(BK) Difference
Power and efficiency
Rated power 640 Wp 440 Wp +200 W for HiS-T640NJ
Module efficiency 22.90 % 22.53 % +0.37 pp for HiS-T640NJ
Power density 229.0 Wp/m² 225.3 Wp/m² +3.6 Wp/m² for HiS-T640NJ
Open-circuit voltage 57.77 V 38.80 V 18.97 V apart
Voltage at max power 47.74 V 32.30 V 15.44 V apart
Short-circuit current 14.06 A 14.39 A Effectively the same
Current at max power 13.41 A 13.63 A Effectively the same
Temperature
Temperature coefficient -0.290 %/°C -0.300 %/°C +0.010 %/°C for HiS-T640NJ
Mechanical
Dimensions 2465x1134x30 mm 1722x1134x30 mm 2465x1134x30 mm vs 1722x1134x30 mm
Module area 2.795 m² 1.953 m² 0.843 m² apart
Weight 34.7 kg 24.5 kg -10.2 kg for HiN-T440NF(BK)
Weight per kWp 54.2 kg/kWp 55.7 kg/kWp Effectively the same
Warranty and degradation
Product warranty 12 yrs 25 yrs +13 yrs for HiN-T440NF(BK)
Performance warranty 30 yrs 30 yrs Same
Annual degradation 0.40 %/yr 0.40 %/yr Same
Technology
Cell technology TOPCon TOPCon Same
Cell type Monocrystalline Monocrystalline Same
Cell count 156 108 48 cells apart
Bifacial Yes Yes Same
04

Against the whole database

14,005 panels
Efficiency
#2,359 vs #3,982
HiS-T640NJ leads by 1,623 places
Power density
#2,389 vs #4,099
HiS-T640NJ leads by 1,710 places
Heat behaviour
#2,165 vs #6,093
HiS-T640NJ leads by 3,928 places
Weight
#8,447 vs #10,051
HiS-T640NJ leads by 1,604 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#2,090 vs #6,585
HiS-T640NJ leads by 4,495 places
05

More useful comparisons

Open the full database
Same series, other bin
Hyundai HiS-T640NJ vs Hyundai HiS-T635NJ
The same specification on paper
Same series, other bin
Hyundai HiS-T640NJ vs Hyundai HiS-T630NJ
3 differences, the largest is module efficiency
Same series, other bin
Hyundai HiN-T440NF(BK) vs Hyundai HiN-T435NF(BK)
One difference: module efficiency
Same series, other bin
Hyundai HiN-T440NF(BK) vs Hyundai HiN-T430NF(BK)
3 differences, the largest is module efficiency
Same manufacturer
Hyundai HiS-T640NJ vs Hyundai HiT-H520LF-FB(ZB)
16 differences, the largest is temperature coefficient
Same manufacturer
Hyundai HiS-T640NJ vs Hyundai HiT-H515LF-FB(ZB)
14 differences, the largest is temperature coefficient
06

Written summary

07

Questions about this pairing

Which panel is better: Hyundai HiS-T640NJ or Hyundai HiN-T440NF(BK)?
According to our database: Hyundai HiS-T640NJ has higher module efficiency (22.90% vs 22.53%); Hyundai HiS-T640NJ tolerates heat better (temp coeff -0.290%/°C vs -0.300%/°C). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Hyundai HiS-T640NJ and Hyundai HiN-T440NF(BK)?
Hyundai HiS-T640NJ has a module efficiency of 22.90%, while Hyundai HiN-T440NF(BK) is 22.53%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Hyundai HiS-T640NJ use vs Hyundai HiN-T440NF(BK)?
Hyundai HiS-T640NJ uses TOPCon cells; Hyundai HiN-T440NF(BK) uses TOPCon. Modern n-type technologies (TOPCon, HJT, BC) typically deliver higher efficiency and lower degradation compared to older PERC (p-type) cells.
What is the warranty on Hyundai HiS-T640NJ and Hyundai HiN-T440NF(BK)?
Hyundai HiS-T640NJ has a 30 years power warranty; Hyundai HiN-T440NF(BK) has a 30 years power warranty. The power warranty guarantees a minimum percentage of rated output at the end of the warranty period (typically 80-87%). Product (materials) warranties are usually shorter.
Are Hyundai HiS-T640NJ and Hyundai HiN-T440NF(BK) bifacial panels?
Both Hyundai HiS-T640NJ and Hyundai HiN-T440NF(BK) are bifacial - they capture reflected light from the ground, which can add 5-15% more annual energy on ground-mount or elevated rooftop installations with a light surface beneath.

Shop prices: See 45 Hyundai offers

Every figure here is from the manufacturers' own datasheets - a dash means the value is not published, never an estimate. The thirty-year projection and the temperature scenarios are calculations from those figures, and each states its assumption above.