Tongwei TWMND-72HD600 vs Tongwei TWMNF-66HD740
VS
The verdict
TWMNF-66HD740 leads on the differences that matter
The largest is rated power: 140 W more power. 6 of 19 comparable parameters are identical.
See all 13 differencesHow alike are they
6
of 19 comparable
parameters are identical
parameters are identical
identical
differs
01
13 of 19 parameters
What actually differs
Parameter
TWMND-72HD600
TWMNF-66HD740
Difference
Rated power
600 Wp
740 Wp
140 W more power
Module efficiency
23.20 %
23.80 %
0.60 pp more efficient
Weight
31.5 kg
37.3 kg
5.8 kg lighter
Short-circuit current
14.20 A
18.81 A
4.61 A apart
Module area
2.583 m²
3.106 m²
0.523 m² apart
Power density
232.3 Wp/m²
238.2 Wp/m²
6.0 Wp/m² higher
Open-circuit voltage
53.40 V
49.80 V
3.60 V apart
Cell technology
N-type
TOPCon
N-type vs TOPCon
Current at max power
13.47 A
17.75 A
4.28 A apart
Cell count
144
132
12 cells apart
Weight per kWp
52.5 kg/kWp
50.4 kg/kWp
2.1 kg/kWp lighter
Voltage at max power
44.56 V
41.69 V
2.87 V apart
Dimensions
2278x1134x30 mm
2384x1303x33 mm
2278x1134x30 mm vs 2384x1303x33 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
Same temp coeff. for both panels (-0.280 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other.
TWMND-72HD600
20,131 kWh
TWMNF-66HD740
24,828 kWh
Lifetime gap
4,697 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
TWMND-72HD600
TWMNF-66HD740
Standard test conditions
25 °C
100.0% of rated power
600 W
740 W
Cool, bright day
40 °C
95.8% of rated power
575 W
709 W
Typical summer roof
55 °C
91.6% of rated power
550 W
678 W
Hot roof
70 °C
87.4% of rated power
524 W
647 W
03
Full specification
Parameter
TWMND-72HD600
TWMNF-66HD740
Difference
Power and efficiency
Rated power
600 Wp
740 Wp
+140 W for TWMNF-66HD740
Module efficiency
23.20 %
23.80 %
+0.60 pp for TWMNF-66HD740
Power density
232.3 Wp/m²
238.2 Wp/m²
+6.0 Wp/m² for TWMNF-66HD740
Open-circuit voltage
53.40 V
49.80 V
3.60 V apart
Voltage at max power
44.56 V
41.69 V
2.87 V apart
Short-circuit current
14.20 A
18.81 A
4.61 A apart
Current at max power
13.47 A
17.75 A
4.28 A apart
Temperature
Temperature coefficient
-0.280 %/°C
-0.280 %/°C
Same
Mechanical
Dimensions
2278x1134x30 mm
2384x1303x33 mm
2278x1134x30 mm vs 2384x1303x33 mm
Module area
2.583 m²
3.106 m²
0.523 m² apart
Weight
31.5 kg
37.3 kg
-5.8 kg for TWMND-72HD600
Weight per kWp
52.5 kg/kWp
50.4 kg/kWp
-2.1 kg/kWp for TWMNF-66HD740
Warranty and degradation
Product warranty
12 yrs
12 yrs
Same
Performance warranty
30 yrs
30 yrs
Same
Annual degradation
0.40 %/yr
0.40 %/yr
Same
Technology
Cell technology
N-type
TOPCon
N-type vs TOPCon
Cell type
Monocrystalline
Monocrystalline
Same
Cell count
144
132
12 cells apart
Bifacial
Yes
Yes
Same
04
14,129 panels
Against the whole database
Efficiency
#1,349
vs
#462
TWMNF-66HD740 leads by 887 places
Power density
#1,295
vs
#460
TWMNF-66HD740 leads by 835 places
Heat behaviour
#1,347
vs
#1,347
Tied - the same position in the database
Weight
#6,090
vs
#3,801
TWMNF-66HD740 leads by 2,289 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#2,990
vs
#183
TWMNF-66HD740 leads by 2,807 places
05
Open the full database
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06
Written summary
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07
Questions about this pairing
Which panel is better: Tongwei TWMND-72HD600 or Tongwei TWMNF-66HD740?
According to our database: Tongwei TWMNF-66HD740 has higher module efficiency (23.80% vs 23.20%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Tongwei TWMND-72HD600 and Tongwei TWMNF-66HD740?
Tongwei TWMND-72HD600 has a module efficiency of 23.20%, 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 TWMND-72HD600 use vs Tongwei TWMNF-66HD740?
Tongwei TWMND-72HD600 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 TWMND-72HD600 and Tongwei TWMNF-66HD740?
Tongwei TWMND-72HD600 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 TWMND-72HD600 and Tongwei TWMNF-66HD740 bifacial panels?
Both Tongwei TWMND-72HD600 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.
Shop prices: See 56 Tongwei 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.