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

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

Hyundai HiN-T440NF(BK)
HiN-T440NF(BK)
440 Wp 22.53 % TOPCon Bifacial
Open panel page Datasheet PDF
VS
HiS-T640NJ
640 Wp 22.90 % 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 HiN-T440NF(BK) HiS-T640NJ Difference
Rated power 440 Wp 640 Wp 200 W more power
Weight 24.5 kg 34.7 kg 10.2 kg lighter
Product warranty 25 yrs 12 yrs 13 yrs longer
Module efficiency 22.53 % 22.90 % 0.37 pp more efficient
Open-circuit voltage 38.80 V 57.77 V 18.97 V apart
Module area 1.953 m² 2.795 m² 0.843 m² apart
Temperature coefficient -0.300 %/°C -0.290 %/°C 0.010 %/°C better in heat
Power density 225.3 Wp/m² 229.0 Wp/m² 3.6 Wp/m² higher
Voltage at max power 32.30 V 47.74 V 15.44 V apart
Cell count 108 156 48 cells apart
Dimensions 1722x1134x30 mm 2465x1134x30 mm 1722x1134x30 mm vs 2465x1134x30 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
HiN-T440NF(BK)
14,763 kWh
HiS-T640NJ
21,473 kWh
Lifetime gap
6,710 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario HiN-T440NF(BK) HiS-T640NJ
Standard test conditions 25 °C 100.0% of rated power 440 W 640 W
Cool, bright day 40 °C 95.5% of rated power 420 W 612 W
Typical summer roof 55 °C 91.0% of rated power 400 W 584 W
Hot roof 70 °C 86.5% of rated power 381 W 556 W
03

Full specification

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

Against the whole database

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

More useful comparisons

Open the full database
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 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 manufacturer
Hyundai HiN-T440NF(BK) vs Hyundai HiT-H520LF-FB(ZB)
15 differences, the largest is module efficiency
Same manufacturer
Hyundai HiN-T440NF(BK) vs Hyundai HiT-H515LF-FB(ZB)
15 differences, the largest is temperature coefficient
06

Written summary

07

Questions about this pairing

Which panel is better: Hyundai HiN-T440NF(BK) or Hyundai HiS-T640NJ?
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 HiN-T440NF(BK) and Hyundai HiS-T640NJ?
Hyundai HiN-T440NF(BK) has a module efficiency of 22.53%, while Hyundai HiS-T640NJ is 22.90%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Hyundai HiN-T440NF(BK) use vs Hyundai HiS-T640NJ?
Hyundai HiN-T440NF(BK) uses TOPCon cells; Hyundai HiS-T640NJ 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 HiN-T440NF(BK) and Hyundai HiS-T640NJ?
Hyundai HiN-T440NF(BK) has a 30 years power warranty; Hyundai HiS-T640NJ 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 HiN-T440NF(BK) and Hyundai HiS-T640NJ bifacial panels?
Both Hyundai HiN-T440NF(BK) and Hyundai HiS-T640NJ 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.