Tongwei TWMNH-66HD vs Tongwei TNC M10-72 Monofacial
VS
The verdict
TWMNH-66HD leads on the differences that matter
The largest is rated power: 25 W more power. 6 of 17 comparable parameters are identical, with 2 more left out because at least one datasheet does not publish them.
See all 11 differencesHow alike are they
6
of 17 comparable
parameters are identical
parameters are identical
identical
differs
not published
01
11 of 17 parameters
What actually differs
Parameter
TWMNH-66HD
TNC M10-72 Monofacial
Difference
Rated power
620 Wp
595 Wp
25 W more power
Weight per kWp
46.8 kg/kWp
52.9 kg/kWp
6.2 kg/kWp lighter
Product warranty
15 yrs
12 yrs
3 yrs longer
Open-circuit voltage
49.10 V
53.20 V
4.10 V apart
Module area
2.701 m²
2.583 m²
0.118 m² apart
Short-circuit current
16.06 A
14.15 A
1.91 A apart
Weight
29.0 kg
31.5 kg
2.5 kg lighter
Voltage at max power
40.82 V
44.41 V
3.59 V apart
Current at max power
15.19 A
13.40 A
1.79 A apart
Bifacial
Yes
No
Yes vs No
Dimensions
2382x1134x30 mm
2278x1134 mm
2382x1134x30 mm vs 2278x1134 mm
02
What it means on a roof
Thirty years of production
A 1.0% first-year loss then 0.40% a year, assumed for both panels, 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.
TWMNH-66HD
20,802 kWh
TNC M10-72 Monofacial
19,963 kWh
Lifetime gap
839 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
TWMNH-66HD
TNC M10-72 Monofacial
Standard test conditions
25 °C
100.0% of rated power
620 W
595 W
Cool, bright day
40 °C
95.8% of rated power
594 W
570 W
Typical summer roof
55 °C
91.6% of rated power
568 W
545 W
Hot roof
70 °C
87.4% of rated power
542 W
520 W
03
Full specification
Parameter
TWMNH-66HD
TNC M10-72 Monofacial
Difference
Power and efficiency
Rated power
620 Wp
595 Wp
+25 W for TWMNH-66HD
Module efficiency
22.95 %
23.00 %
Effectively the same
Power density
229.5 Wp/m²
230.3 Wp/m²
Effectively the same
Open-circuit voltage
49.10 V
53.20 V
4.10 V apart
Voltage at max power
40.82 V
44.41 V
3.59 V apart
Short-circuit current
16.06 A
14.15 A
1.91 A apart
Current at max power
15.19 A
13.40 A
1.79 A apart
Temperature
Temperature coefficient
-0.280 %/°C
-0.280 %/°C
Same
Mechanical
Dimensions
2382x1134x30 mm
2278x1134 mm
2382x1134x30 mm vs 2278x1134 mm
Module area
2.701 m²
2.583 m²
0.118 m² apart
Weight
29.0 kg
31.5 kg
-2.5 kg for TWMNH-66HD
Weight per kWp
46.8 kg/kWp
52.9 kg/kWp
-6.2 kg/kWp for TWMNH-66HD
Warranty and degradation
Product warranty
15 yrs
12 yrs
+3 yrs for TWMNH-66HD
Performance warranty
30 yrs
30 yrs
Same
Annual degradation
-
0.40 %/yr
Not published by Tongwei
Technology
Cell technology
TOPCon
TOPCon
Same
Cell type
Monocrystalline
Monocrystalline
Same
Cell count
132
-
Not published by Tongwei
Bifacial
Yes
No
Yes vs No
04
14,129 panels
Against the whole database
Efficiency
#2,320
vs
#1,970
TNC M10-72 Monofacial leads by 350 places
Power density
#2,243
vs
#1,809
TNC M10-72 Monofacial leads by 434 places
Heat behaviour
#1,347
vs
#1,347
Tied - the same position in the database
Weight
#1,343
vs
#6,715
TWMNH-66HD leads by 5,372 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#2,040
vs
#3,400
TWMNH-66HD leads by 1,360 places
05
Open the full database
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The same specification on paper
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06
Written summary
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07
Questions about this pairing
Which panel is better: Tongwei TWMNH-66HD or Tongwei TNC M10-72 Monofacial?
According to our database: Tongwei TNC M10-72 Monofacial has higher module efficiency (23.00% vs 22.95%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Tongwei TWMNH-66HD and Tongwei TNC M10-72 Monofacial?
Tongwei TWMNH-66HD has a module efficiency of 22.95%, while Tongwei TNC M10-72 Monofacial is 23.00%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Tongwei TWMNH-66HD use vs Tongwei TNC M10-72 Monofacial?
Tongwei TWMNH-66HD uses TOPCon cells; Tongwei TNC M10-72 Monofacial 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 TWMNH-66HD and Tongwei TNC M10-72 Monofacial?
Tongwei TWMNH-66HD has a 30 years power warranty; Tongwei TNC M10-72 Monofacial 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-66HD and Tongwei TNC M10-72 Monofacial bifacial panels?
Tongwei TWMNH-66HD is bifacial (captures light from both faces); Tongwei TNC M10-72 Monofacial is monofacial. Bifacial panels work best on ground mounts or raised structures with a light-coloured surface underneath.
Shop prices: See 58 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.