Tongwei TWMNH-54HD vs Tongwei TWMNF-66HD745
VS
The verdict
TWMNF-66HD745 leads on the differences that matter
The largest is module efficiency: 4.93 pp more efficient. 6 of 18 comparable parameters are identical, with 1 more left out because at least one datasheet does not publish it.
See all 12 differencesHow alike are they
6
of 18 comparable
parameters are identical
parameters are identical
identical
differs
not published
01
12 of 18 parameters
What actually differs
Parameter
TWMNH-54HD
TWMNF-66HD745
Difference
Module efficiency
19.07 %
24.00 %
4.93 pp more efficient
Rated power
515 Wp
745 Wp
230 W more power
Power density
190.7 Wp/m²
239.8 Wp/m²
49.2 Wp/m² higher
Weight
29.0 kg
37.3 kg
8.3 kg lighter
Weight per kWp
56.3 kg/kWp
50.1 kg/kWp
6.2 kg/kWp lighter
Product warranty
15 yrs
12 yrs
3 yrs longer
Open-circuit voltage
40.60 V
49.95 V
9.35 V apart
Short-circuit current
15.98 A
18.87 A
2.89 A apart
Module area
2.701 m²
3.106 m²
0.405 m² apart
Voltage at max power
34.43 V
41.86 V
7.43 V apart
Current at max power
14.96 A
17.80 A
2.84 A apart
Dimensions
2382x1134x30 mm
2384x1303x33 mm
2382x1134x30 mm vs 2384x1303x33 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-54HD
17,279 kWh
TWMNF-66HD745
24,996 kWh
Lifetime gap
7,717 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
TWMNH-54HD
TWMNF-66HD745
Standard test conditions
25 °C
100.0% of rated power
515 W
745 W
Cool, bright day
40 °C
95.8% of rated power
493 W
714 W
Typical summer roof
55 °C
91.6% of rated power
472 W
682 W
Hot roof
70 °C
87.4% of rated power
450 W
651 W
03
Full specification
Parameter
TWMNH-54HD
TWMNF-66HD745
Difference
Power and efficiency
Rated power
515 Wp
745 Wp
+230 W for TWMNF-66HD745
Module efficiency
19.07 %
24.00 %
+4.93 pp for TWMNF-66HD745
Power density
190.7 Wp/m²
239.8 Wp/m²
+49.2 Wp/m² for TWMNF-66HD745
Open-circuit voltage
40.60 V
49.95 V
9.35 V apart
Voltage at max power
34.43 V
41.86 V
7.43 V apart
Short-circuit current
15.98 A
18.87 A
2.89 A apart
Current at max power
14.96 A
17.80 A
2.84 A apart
Temperature
Temperature coefficient
-0.280 %/°C
-0.280 %/°C
Same
Mechanical
Dimensions
2382x1134x30 mm
2384x1303x33 mm
2382x1134x30 mm vs 2384x1303x33 mm
Module area
2.701 m²
3.106 m²
0.405 m² apart
Weight
29.0 kg
37.3 kg
-8.3 kg for TWMNH-54HD
Weight per kWp
56.3 kg/kWp
50.1 kg/kWp
-6.2 kg/kWp for TWMNF-66HD745
Warranty and degradation
Product warranty
15 yrs
12 yrs
+3 yrs for TWMNH-54HD
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
132
Same
Bifacial
Yes
Yes
Same
04
14,005 panels
Against the whole database
Efficiency
#12,923
vs
#303
TWMNF-66HD745 leads by 12,620 places
Power density
#12,908
vs
#339
TWMNF-66HD745 leads by 12,569 places
Heat behaviour
#1,309
vs
#1,309
Tied - the same position in the database
Weight
#10,565
vs
#3,586
TWMNF-66HD745 leads by 6,979 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#9,980
vs
#148
TWMNF-66HD745 leads by 9,832 places
05
Open the full database
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The same specification on paper
06
Written summary
Checking cache...
07
Questions about this pairing
Which panel is better: Tongwei TWMNH-54HD or Tongwei TWMNF-66HD745?
According to our database: Tongwei TWMNF-66HD745 has higher module efficiency (24.00% vs 19.07%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Tongwei TWMNH-54HD and Tongwei TWMNF-66HD745?
Tongwei TWMNH-54HD has a module efficiency of 19.07%, while Tongwei TWMNF-66HD745 is 24.00%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Tongwei TWMNH-54HD use vs Tongwei TWMNF-66HD745?
Tongwei TWMNH-54HD uses TOPCon cells; Tongwei TWMNF-66HD745 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-54HD and Tongwei TWMNF-66HD745?
Tongwei TWMNH-54HD has a 30 years power warranty; Tongwei TWMNF-66HD745 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-54HD and Tongwei TWMNF-66HD745 bifacial panels?
Both Tongwei TWMNH-54HD and Tongwei TWMNF-66HD745 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 71 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.