Tongwei TWMNH-66HD610 vs Tongwei TWMHF-66HD740X
VS
The verdict
TWMHF-66HD740X leads on the differences that matter
The largest is module efficiency: 1.20 pp more efficient. 5 of 19 comparable parameters are identical.
See all 14 differencesHow alike are they
5
of 19 comparable
parameters are identical
parameters are identical
identical
differs
01
14 of 19 parameters
What actually differs
Parameter
TWMNH-66HD610
TWMHF-66HD740X
Difference
Module efficiency
22.60 %
23.80 %
1.20 pp more efficient
Temperature coefficient
-0.280 %/°C
-0.240 %/°C
0.040 %/°C better in heat
Rated power
610 Wp
740 Wp
130 W more power
Power density
225.8 Wp/m²
238.2 Wp/m²
12.4 Wp/m² higher
Weight
32.5 kg
37.0 kg
4.5 kg lighter
Product warranty
12 yrs
15 yrs
3 yrs longer
Short-circuit current
15.94 A
18.47 A
2.53 A apart
Module area
2.701 m²
3.106 m²
0.405 m² apart
Cell technology
TOPCon
N-type
TOPCon vs N-type
Weight per kWp
53.3 kg/kWp
50.0 kg/kWp
3.3 kg/kWp lighter
Current at max power
15.07 A
17.49 A
2.42 A apart
Open-circuit voltage
48.70 V
50.62 V
1.92 V apart
Dimensions
2382x1134x30 mm
2384x1303x33 mm
2382x1134x30 mm vs 2384x1303x33 mm
Voltage at max power
40.48 V
42.32 V
1.84 V 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
TWMNH-66HD610
20,467 kWh
TWMHF-66HD740X
24,925 kWh
Lifetime gap
4,458 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
TWMNH-66HD610
TWMHF-66HD740X
Standard test conditions
25 °C
100.0% of rated power
610 W
740 W
Cool, bright day
40 °C
95.8% of rated power
584 W
713 W
Typical summer roof
55 °C
91.6% of rated power
559 W
687 W
Hot roof
70 °C
87.4% of rated power
533 W
660 W
03
Full specification
Parameter
TWMNH-66HD610
TWMHF-66HD740X
Difference
Power and efficiency
Rated power
610 Wp
740 Wp
+130 W for TWMHF-66HD740X
Module efficiency
22.60 %
23.80 %
+1.20 pp for TWMHF-66HD740X
Power density
225.8 Wp/m²
238.2 Wp/m²
+12.4 Wp/m² for TWMHF-66HD740X
Open-circuit voltage
48.70 V
50.62 V
1.92 V apart
Voltage at max power
40.48 V
42.32 V
1.84 V apart
Short-circuit current
15.94 A
18.47 A
2.53 A apart
Current at max power
15.07 A
17.49 A
2.42 A apart
Temperature
Temperature coefficient
-0.280 %/°C
-0.240 %/°C
+0.040 %/°C for TWMHF-66HD740X
Mechanical
Dimensions
2382x1134x30 mm
2384x1303x33 mm
2382x1134x30 mm vs 2384x1303x33 mm
Module area
2.701 m²
3.106 m²
0.405 m² apart
Weight
32.5 kg
37.0 kg
-4.5 kg for TWMNH-66HD610
Weight per kWp
53.3 kg/kWp
50.0 kg/kWp
-3.3 kg/kWp for TWMHF-66HD740X
Warranty and degradation
Product warranty
12 yrs
15 yrs
+3 yrs for TWMHF-66HD740X
Performance warranty
30 yrs
30 yrs
Same
Annual degradation
0.40 %/yr
0.38 %/yr
Effectively the same
Technology
Cell technology
TOPCon
N-type
TOPCon vs N-type
Cell type
Monocrystalline
Monocrystalline
Same
Cell count
132
132
Same
Bifacial
Yes
Yes
Same
04
14,005 panels
Against the whole database
Efficiency
#3,658
vs
#433
TWMHF-66HD740X leads by 3,225 places
Power density
#3,729
vs
#431
TWMHF-66HD740X leads by 3,298 places
Heat behaviour
#1,309
vs
#13
TWMHF-66HD740X leads by 1,296 places
Weight
#7,135
vs
#3,317
TWMHF-66HD740X leads by 3,818 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#3,278
vs
#130
TWMHF-66HD740X leads by 3,148 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 TWMNH-66HD610 or Tongwei TWMHF-66HD740X?
According to our database: Tongwei TWMHF-66HD740X has higher module efficiency (23.80% vs 22.60%); 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 TWMNH-66HD610 and Tongwei TWMHF-66HD740X?
Tongwei TWMNH-66HD610 has a module efficiency of 22.60%, while Tongwei TWMHF-66HD740X is 23.80%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Tongwei TWMNH-66HD610 use vs Tongwei TWMHF-66HD740X?
Tongwei TWMNH-66HD610 uses TOPCon cells; Tongwei TWMHF-66HD740X uses N-type. 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 TWMNH-66HD610 and Tongwei TWMHF-66HD740X?
Tongwei TWMNH-66HD610 has a 30 years power warranty; Tongwei TWMHF-66HD740X 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 TWMNH-66HD610 and Tongwei TWMHF-66HD740X bifacial panels?
Both Tongwei TWMNH-66HD610 and Tongwei TWMHF-66HD740X 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.