Tongwei TWMNH-54HD vs Tongwei TWMNF-66HD
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
TWMNH-54HD
TWMNF-66HD
Difference
Module efficiency
19.07 %
23.00 %
3.93 pp more efficient
Rated power
515 Wp
715 Wp
200 W more power
Power density
190.7 Wp/m²
230.2 Wp/m²
39.5 Wp/m² higher
Weight
29.0 kg
37.9 kg
8.9 kg lighter
Open-circuit voltage
40.60 V
49.11 V
8.51 V apart
Short-circuit current
15.98 A
18.50 A
2.52 A apart
Module area
2.701 m²
3.106 m²
0.405 m² apart
Weight per kWp
56.3 kg/kWp
53.0 kg/kWp
3.3 kg/kWp lighter
Voltage at max power
34.43 V
40.86 V
6.43 V apart
Current at max power
14.96 A
17.50 A
2.54 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-66HD
23,990 kWh
Lifetime gap
6,711 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
TWMNH-54HD
TWMNF-66HD
Standard test conditions
25 °C
100.0% of rated power
515 W
715 W
Cool, bright day
40 °C
95.8% of rated power
493 W
685 W
Typical summer roof
55 °C
91.6% of rated power
472 W
655 W
Hot roof
70 °C
87.4% of rated power
450 W
625 W
03
Full specification
Parameter
TWMNH-54HD
TWMNF-66HD
Difference
Power and efficiency
Rated power
515 Wp
715 Wp
+200 W for TWMNF-66HD
Module efficiency
19.07 %
23.00 %
+3.93 pp for TWMNF-66HD
Power density
190.7 Wp/m²
230.2 Wp/m²
+39.5 Wp/m² for TWMNF-66HD
Open-circuit voltage
40.60 V
49.11 V
8.51 V apart
Voltage at max power
34.43 V
40.86 V
6.43 V apart
Short-circuit current
15.98 A
18.50 A
2.52 A apart
Current at max power
14.96 A
17.50 A
2.54 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
37.9 kg
-8.9 kg for TWMNH-54HD
Weight per kWp
56.3 kg/kWp
53.0 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
#12,923
vs
#1,919
TWMNF-66HD leads by 11,004 places
Power density
#12,908
vs
#2,018
TWMNF-66HD leads by 10,890 places
Heat behaviour
#1,309
vs
#1,309
Tied - the same position in the database
Weight
#10,565
vs
#6,744
TWMNF-66HD leads by 3,821 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#9,980
vs
#450
TWMNF-66HD leads by 9,530 places
05
Open the full database
More useful comparisons
Same series, other bin
Tongwei TWMNH-54HD vs Tongwei THC G12-66 Bifacial
11 differences, the largest is module efficiency
Same series, other bin
Tongwei TWMNH-54HD vs Tongwei TWMNH-66HS
6 differences, the largest is module efficiency
Same series, other bin
Tongwei TWMNH-54HD vs Tongwei TWMNH-66HD
6 differences, the largest is module efficiency
Same series, other bin
Tongwei TWMNH-54HD vs Tongwei TWMNH-48HC
6 differences, the largest is module efficiency
Same manufacturer
Tongwei TWMNH-54HD vs Tongwei TWMNF-66HD750
12 differences, the largest is module efficiency
Same manufacturer
Tongwei TWMNH-54HD vs Tongwei TWMNF-66HD745
12 differences, the largest is module efficiency
06
Written summary
Checking cache...
07
Questions about this pairing
Which panel is better: Tongwei TWMNH-54HD or Tongwei TWMNF-66HD?
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 TWMNH-54HD and Tongwei TWMNF-66HD?
Tongwei TWMNH-54HD has a module efficiency of 19.07%, while Tongwei TWMNF-66HD is 23.00%. 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-66HD?
Tongwei TWMNH-54HD uses TOPCon cells; Tongwei TWMNF-66HD 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-66HD?
Tongwei TWMNH-54HD has a 30 years power warranty; Tongwei TWMNF-66HD 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-66HD bifacial panels?
Both Tongwei TWMNH-54HD and Tongwei TWMNF-66HD 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.