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HiS-T640NJ vs HiT-H440LE-FB(ZB) 3 of 19 identical Swap Change panels

Hyundai HiS-T640NJ vs Hyundai HiT-H440LE-FB(ZB)

HiS-T640NJ
640 Wp 22.90 % TOPCon Bifacial
Open panel page Datasheet PDF
VS
Hyundai HiT-H440LE-FB(ZB)
HiT-H440LE-FB(ZB)
440 Wp 22.00 % HJT Bifacial
Open panel page Datasheet PDF
The verdict

16 differences, and they point both ways

The largest is module efficiency: 0.90 pp more efficient. 3 of 19 comparable parameters are identical.

See all 16 differences
How alike are they
3 of 19 comparable
parameters are identical
identical differs
01

What actually differs

16 of 19 parameters
Parameter HiS-T640NJ HiT-H440LE-FB(ZB) Difference
Module efficiency 22.90 % 22.00 % 0.90 pp more efficient
Temperature coefficient -0.290 %/°C -0.240 %/°C 0.050 %/°C better in heat
Rated power 640 Wp 440 Wp 200 W more power
Weight 34.7 kg 21.6 kg 13.1 kg lighter
Product warranty 12 yrs 30 yrs 18 yrs longer
Power density 229.0 Wp/m² 220.2 Wp/m² 8.7 Wp/m² higher
Annual degradation 0.40 %/yr 0.30 %/yr 0.10 %/yr slower
Open-circuit voltage 57.77 V 36.52 V 21.25 V apart
Module area 2.795 m² 1.998 m² 0.797 m² apart
Weight per kWp 54.2 kg/kWp 49.1 kg/kWp 5.1 kg/kWp lighter
Short-circuit current 14.06 A 15.31 A 1.25 A apart
Cell technology TOPCon HJT TOPCon vs HJT
Voltage at max power 47.74 V 30.61 V 17.13 V apart
Cell count 156 96 60 cells apart
Dimensions 2465x1134x30 mm 1762x1134x30 mm 2465x1134x30 mm vs 1762x1134x30 mm
Current at max power 13.41 A 14.38 A 0.97 A apart
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
HiT-H440LE-FB(ZB)
14,993 kWh
Lifetime gap
6,480 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario HiS-T640NJ HiT-H440LE-FB(ZB)
Standard test conditions 25 °C 100.0% of rated power 640 W 440 W
Cool, bright day 40 °C 95.7% of rated power 612 W 424 W
Typical summer roof 55 °C 91.3% of rated power 584 W 408 W
Hot roof 70 °C 87.0% of rated power 556 W 392 W
03

Full specification

Parameter HiS-T640NJ HiT-H440LE-FB(ZB) Difference
Power and efficiency
Rated power 640 Wp 440 Wp +200 W for HiS-T640NJ
Module efficiency 22.90 % 22.00 % +0.90 pp for HiS-T640NJ
Power density 229.0 Wp/m² 220.2 Wp/m² +8.7 Wp/m² for HiS-T640NJ
Open-circuit voltage 57.77 V 36.52 V 21.25 V apart
Voltage at max power 47.74 V 30.61 V 17.13 V apart
Short-circuit current 14.06 A 15.31 A 1.25 A apart
Current at max power 13.41 A 14.38 A 0.97 A apart
Temperature
Temperature coefficient -0.290 %/°C -0.240 %/°C +0.050 %/°C for HiT-H440LE-FB(ZB)
Mechanical
Dimensions 2465x1134x30 mm 1762x1134x30 mm 2465x1134x30 mm vs 1762x1134x30 mm
Module area 2.795 m² 1.998 m² 0.797 m² apart
Weight 34.7 kg 21.6 kg -13.1 kg for HiT-H440LE-FB(ZB)
Weight per kWp 54.2 kg/kWp 49.1 kg/kWp -5.1 kg/kWp for HiT-H440LE-FB(ZB)
Warranty and degradation
Product warranty 12 yrs 30 yrs +18 yrs for HiT-H440LE-FB(ZB)
Performance warranty 30 yrs 30 yrs Same
Annual degradation 0.40 %/yr 0.30 %/yr -0.10 %/yr for HiT-H440LE-FB(ZB)
Technology
Cell technology TOPCon HJT TOPCon vs HJT
Cell type Monocrystalline Monocrystalline Same
Cell count 156 96 60 cells apart
Bifacial Yes Yes Same
04

Against the whole database

14,005 panels
Efficiency
#2,359 vs #6,517
HiS-T640NJ leads by 4,158 places
Power density
#2,389 vs #6,328
HiS-T640NJ leads by 3,939 places
Heat behaviour
#2,165 vs #13
HiT-H440LE-FB(ZB) leads by 2,152 places
Weight
#8,447 vs #2,739
HiT-H440LE-FB(ZB) leads by 5,708 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#2,090 vs #5,958
HiS-T640NJ leads by 3,868 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 HiT-H440LE-FB(ZB) vs Hyundai HiT-H460LE-FB(ZB)
4 differences, the largest is module efficiency
Same series, other bin
Hyundai HiT-H440LE-FB(ZB) vs Hyundai HiT-H455LE-FB(ZB)
3 differences, the largest is module efficiency
Same series, other bin
Hyundai HiT-H440LE-FB(ZB) vs Hyundai HiT-H450LE-FB(ZB)
3 differences, the largest is module efficiency
Same series, other bin
Hyundai HiT-H440LE-FB(ZB) vs Hyundai HiT-H445LE-FB(ZB)
One difference: module efficiency
06

Written summary

07

Questions about this pairing

Which panel is better: Hyundai HiS-T640NJ or Hyundai HiT-H440LE-FB(ZB)?
According to our database: Hyundai HiS-T640NJ has higher module efficiency (22.90% vs 22.00%); Hyundai HiT-H440LE-FB(ZB) tolerates heat better (temp coeff -0.240%/°C vs -0.290%/°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 HiT-H440LE-FB(ZB)?
Hyundai HiS-T640NJ has a module efficiency of 22.90%, while Hyundai HiT-H440LE-FB(ZB) is 22.00%. 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 HiT-H440LE-FB(ZB)?
Hyundai HiS-T640NJ uses TOPCon cells; Hyundai HiT-H440LE-FB(ZB) uses HJT. 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 HiT-H440LE-FB(ZB)?
Hyundai HiS-T640NJ has a 30 years power warranty; Hyundai HiT-H440LE-FB(ZB) 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 HiT-H440LE-FB(ZB) bifacial panels?
Both Hyundai HiS-T640NJ and Hyundai HiT-H440LE-FB(ZB) 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.

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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.