Tongwei TWMNF-66HD vs Tongwei TWMNH-54HD
VS
The verdict
TWMNF-66HD leads on the differences that matter
The largest is module efficiency: 3.93 pp more efficient. 7 of 18 comparable parameters are identical, with 1 more left out because at least one datasheet does not publish it.
See all 11 differencesHow alike are they
7
of 18 comparable
parameters are identical
parameters are identical
identical
differs
not published
01
11 of 18 parameters
What actually differs
Parameter
TWMNF-66HD
TWMNH-54HD
Difference
Module efficiency
23.00 %
19.07 %
3.93 pp more efficient
Rated power
715 Wp
515 Wp
200 W more power
Power density
230.2 Wp/m²
190.7 Wp/m²
39.5 Wp/m² higher
Weight
37.9 kg
29.0 kg
8.9 kg lighter
Open-circuit voltage
49.11 V
40.60 V
8.51 V apart
Short-circuit current
18.50 A
15.98 A
2.52 A apart
Module area
3.106 m²
2.701 m²
0.405 m² apart
Weight per kWp
53.0 kg/kWp
56.3 kg/kWp
3.3 kg/kWp lighter
Voltage at max power
40.86 V
34.43 V
6.43 V apart
Current at max power
17.50 A
14.96 A
2.54 A apart
Dimensions
2384x1303x33 mm
2382x1134x30 mm
2384x1303x33 mm vs 2382x1134x30 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.
TWMNF-66HD
23,990 kWh
TWMNH-54HD
17,279 kWh
Lifetime gap
6,711 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
TWMNF-66HD
TWMNH-54HD
Standard test conditions
25 °C
100.0% of rated power
715 W
515 W
Cool, bright day
40 °C
95.8% of rated power
685 W
493 W
Typical summer roof
55 °C
91.6% of rated power
655 W
472 W
Hot roof
70 °C
87.4% of rated power
625 W
450 W
03
Full specification
Parameter
TWMNF-66HD
TWMNH-54HD
Difference
Power and efficiency
Rated power
715 Wp
515 Wp
+200 W for TWMNF-66HD
Module efficiency
23.00 %
19.07 %
+3.93 pp for TWMNF-66HD
Power density
230.2 Wp/m²
190.7 Wp/m²
+39.5 Wp/m² for TWMNF-66HD
Open-circuit voltage
49.11 V
40.60 V
8.51 V apart
Voltage at max power
40.86 V
34.43 V
6.43 V apart
Short-circuit current
18.50 A
15.98 A
2.52 A apart
Current at max power
17.50 A
14.96 A
2.54 A apart
Temperature
Temperature coefficient
-0.280 %/°C
-0.280 %/°C
Same
Mechanical
Dimensions
2384x1303x33 mm
2382x1134x30 mm
2384x1303x33 mm vs 2382x1134x30 mm
Module area
3.106 m²
2.701 m²
0.405 m² apart
Weight
37.9 kg
29.0 kg
-8.9 kg for TWMNH-54HD
Weight per kWp
53.0 kg/kWp
56.3 kg/kWp
-3.3 kg/kWp for TWMNF-66HD
Warranty and degradation
Product warranty
15 yrs
15 yrs
Same
Performance warranty
30 yrs
30 yrs
Same
Annual degradation
-
-
Neither datasheet publishes this
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
#1,919
vs
#12,923
TWMNF-66HD leads by 11,004 places
Power density
#2,018
vs
#12,908
TWMNF-66HD leads by 10,890 places
Heat behaviour
#1,309
vs
#1,309
Tied - the same position in the database
Weight
#6,744
vs
#10,565
TWMNF-66HD leads by 3,821 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#450
vs
#9,980
TWMNF-66HD leads by 9,530 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 TWMNF-66HD or Tongwei TWMNH-54HD?
According to our database: Tongwei TWMNF-66HD has higher module efficiency (23.00% vs 19.07%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Tongwei TWMNF-66HD and Tongwei TWMNH-54HD?
Tongwei TWMNF-66HD has a module efficiency of 23.00%, while Tongwei TWMNH-54HD is 19.07%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Tongwei TWMNF-66HD use vs Tongwei TWMNH-54HD?
Tongwei TWMNF-66HD uses TOPCon cells; Tongwei TWMNH-54HD 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 TWMNF-66HD and Tongwei TWMNH-54HD?
Tongwei TWMNF-66HD has a 30 years power warranty; Tongwei TWMNH-54HD 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 TWMNF-66HD and Tongwei TWMNH-54HD bifacial panels?
Both Tongwei TWMNF-66HD and Tongwei TWMNH-54HD 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.