Tongwei TWMHF-66HD735X vs Tongwei TWMNF-66HD740
VS
The verdict
TWMHF-66HD735X 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 differencesHow alike are they
16
of 19 comparable
parameters are identical
parameters are identical
identical
differs
01
3 of 19 parameters
What actually differs
Parameter
TWMHF-66HD735X
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-66HD735X
24,757 kWh
TWMNF-66HD740
24,828 kWh
Lifetime gap
71 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
TWMHF-66HD735X
TWMNF-66HD740
Standard test conditions
25 °C
100.0% of rated power
735 W
740 W
Cool, bright day
40 °C
95.8% of rated power
709 W
709 W
Typical summer roof
55 °C
91.6% of rated power
682 W
678 W
Hot roof
70 °C
87.4% of rated power
656 W
647 W
03
Full specification
Parameter
TWMHF-66HD735X
TWMNF-66HD740
Difference
Power and efficiency
Rated power
735 Wp
740 Wp
Effectively the same
Module efficiency
23.70 %
23.80 %
Effectively the same
Power density
236.6 Wp/m²
238.2 Wp/m²
Effectively the same
Open-circuit voltage
50.54 V
49.80 V
Effectively the same
Voltage at max power
42.22 V
41.69 V
Effectively the same
Short-circuit current
18.37 A
18.81 A
Effectively the same
Current at max power
17.41 A
17.75 A
Effectively the same
Temperature
Temperature coefficient
-0.240 %/°C
-0.280 %/°C
+0.040 %/°C for TWMHF-66HD735X
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
50.3 kg/kWp
50.4 kg/kWp
Effectively the same
Warranty and degradation
Product warranty
15 yrs
12 yrs
+3 yrs for TWMHF-66HD735X
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
14,005 panels
Against the whole database
Efficiency
#517
vs
#433
TWMNF-66HD740 leads by 84 places
Power density
#582
vs
#431
TWMNF-66HD740 leads by 151 places
Heat behaviour
#13
vs
#1,309
TWMHF-66HD735X leads by 1,296 places
Weight
#3,719
vs
#3,784
TWMHF-66HD735X leads by 65 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#155
vs
#183
TWMHF-66HD735X leads by 28 places
05
Open the full database
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3 differences, the largest is module efficiency
06
Written summary
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07
Questions about this pairing
Which panel is better: Tongwei TWMHF-66HD735X or Tongwei TWMNF-66HD740?
According to our database: Tongwei TWMNF-66HD740 has higher module efficiency (23.80% vs 23.70%); Tongwei TWMHF-66HD735X 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-66HD735X and Tongwei TWMNF-66HD740?
Tongwei TWMHF-66HD735X has a module efficiency of 23.70%, 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-66HD735X use vs Tongwei TWMNF-66HD740?
Tongwei TWMHF-66HD735X 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-66HD735X and Tongwei TWMNF-66HD740?
Tongwei TWMHF-66HD735X 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-66HD735X and Tongwei TWMNF-66HD740 bifacial panels?
Both Tongwei TWMHF-66HD735X 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.