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TWMHF-66HD740X vs TWMNF-66HD740 16 of 19 identical Swap Change panels

Tongwei TWMHF-66HD740X vs Tongwei TWMNF-66HD740

TWMHF-66HD740X
740 Wp 23.80 % N-type Bifacial
Open panel page Datasheet PDF
VS
Tongwei TWMNF-66HD740
TWMNF-66HD740
740 Wp 23.80 % TOPCon Bifacial
Open panel page Datasheet PDF
The verdict

TWMHF-66HD740X leads on the differences that matter

The largest is temperature coefficient: 0.040 %/°C better in heat. 16 of 19 comparable parameters are identical.

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

What actually differs

3 of 19 parameters
Parameter TWMHF-66HD740X TWMNF-66HD740 Difference
Temperature coefficient -0.240 %/°C -0.280 %/°C 0.040 %/°C better in heat
Product warranty 15 yrs 12 yrs 3 yrs longer
Cell technology N-type TOPCon N-type vs TOPCon
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
TWMHF-66HD740X
24,925 kWh
TWMNF-66HD740
24,828 kWh
Lifetime gap
97 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario TWMHF-66HD740X TWMNF-66HD740
Standard test conditions 25 °C 100.0% of rated power 740 W 740 W
Cool, bright day 40 °C 95.8% of rated power 713 W 709 W
Typical summer roof 55 °C 91.6% of rated power 687 W 678 W
Hot roof 70 °C 87.4% of rated power 660 W 647 W
03

Full specification

Parameter TWMHF-66HD740X TWMNF-66HD740 Difference
Power and efficiency
Rated power 740 Wp 740 Wp Same
Module efficiency 23.80 % 23.80 % Same
Power density 238.2 Wp/m² 238.2 Wp/m² Same
Open-circuit voltage 50.62 V 49.80 V Effectively the same
Voltage at max power 42.32 V 41.69 V Effectively the same
Short-circuit current 18.47 A 18.81 A Effectively the same
Current at max power 17.49 A 17.75 A Effectively the same
Temperature
Temperature coefficient -0.240 %/°C -0.280 %/°C +0.040 %/°C for TWMHF-66HD740X
Mechanical
Dimensions 2384x1303x33 mm 2384x1303x33 mm Same
Module area 3.106 m² 3.106 m² Same
Weight 37.0 kg 37.3 kg Effectively the same
Weight per kWp 50.0 kg/kWp 50.4 kg/kWp Effectively the same
Warranty and degradation
Product warranty 15 yrs 12 yrs +3 yrs for TWMHF-66HD740X
Performance warranty 30 yrs 30 yrs Same
Annual degradation 0.38 %/yr 0.40 %/yr Effectively the same
Technology
Cell technology N-type TOPCon N-type vs TOPCon
Cell type Monocrystalline Monocrystalline Same
Cell count 132 132 Same
Bifacial Yes Yes Same
04

Against the whole database

14,005 panels
Efficiency
#433 vs #433
Tied - the same position in the database
Power density
#431 vs #431
Tied - the same position in the database
Heat behaviour
#13 vs #1,309
TWMHF-66HD740X leads by 1,296 places
Weight
#3,317 vs #3,784
TWMHF-66HD740X leads by 467 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#130 vs #183
TWMHF-66HD740X leads by 53 places
05

More useful comparisons

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Tongwei TWMHF-66HD740X vs Tongwei TWMHF-66HD725X
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Tongwei TWMHF-66HD740X vs Tongwei TWMHF-66HD720X
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Tongwei TWMHF-66HD740X vs Tongwei TWMHF-66HD715X
3 differences, the largest is module efficiency
Same series, other bin
Tongwei TWMNF-66HD740 vs Tongwei TWMNF-66HD750
3 differences, the largest is module efficiency
06

Written summary

07

Questions about this pairing

Which panel is better: Tongwei TWMHF-66HD740X or Tongwei TWMNF-66HD740?
According to our database: Tongwei TWMHF-66HD740X tolerates heat better (temp coeff -0.240%/°C vs -0.280%/°C). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Tongwei TWMHF-66HD740X and Tongwei TWMNF-66HD740?
Tongwei TWMHF-66HD740X has a module efficiency of 23.80%, while Tongwei TWMNF-66HD740 is 23.80%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Tongwei TWMHF-66HD740X use vs Tongwei TWMNF-66HD740?
Tongwei TWMHF-66HD740X uses N-type cells; Tongwei TWMNF-66HD740 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 Tongwei TWMHF-66HD740X and Tongwei TWMNF-66HD740?
Tongwei TWMHF-66HD740X has a 30 years power warranty; Tongwei TWMNF-66HD740 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 Tongwei TWMHF-66HD740X and Tongwei TWMNF-66HD740 bifacial panels?
Both Tongwei TWMHF-66HD740X and Tongwei TWMNF-66HD740 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.