Tongwei TWMNH-48HE450 vs Tongwei TWMNF-66HD745
VS
The verdict
TWMNF-66HD745 leads on the differences that matter
The largest is module efficiency: 1.50 pp more efficient. 4 of 19 comparable parameters are identical.
See all 15 differencesHow alike are they
4
of 19 comparable
parameters are identical
parameters are identical
identical
differs
01
15 of 19 parameters
What actually differs
Parameter
TWMNH-48HE450
TWMNF-66HD745
Difference
Module efficiency
22.50 %
24.00 %
1.50 pp more efficient
Rated power
450 Wp
745 Wp
295 W more power
Power density
225.2 Wp/m²
239.8 Wp/m²
14.6 Wp/m² higher
Weight
23.7 kg
37.3 kg
13.6 kg lighter
Product warranty
15 yrs
12 yrs
3 yrs longer
Open-circuit voltage
35.95 V
49.95 V
14.00 V apart
Short-circuit current
15.81 A
18.87 A
3.06 A apart
Module area
1.998 m²
3.106 m²
1.108 m² apart
Cell technology
N-type
TOPCon
N-type vs TOPCon
Voltage at max power
29.81 V
41.86 V
12.05 V apart
Current at max power
15.10 A
17.80 A
2.70 A apart
Cell count
96
132
36 cells apart
Weight per kWp
52.7 kg/kWp
50.1 kg/kWp
2.6 kg/kWp lighter
Bifacial
No
Yes
No vs Yes
Dimensions
1762x1134x30 mm
2384x1303x33 mm
1762x1134x30 mm vs 2384x1303x33 mm
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
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-48HE450
15,098 kWh
TWMNF-66HD745
24,996 kWh
Lifetime gap
9,898 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
TWMNH-48HE450
TWMNF-66HD745
Standard test conditions
25 °C
100.0% of rated power
450 W
745 W
Cool, bright day
40 °C
95.8% of rated power
431 W
714 W
Typical summer roof
55 °C
91.6% of rated power
412 W
682 W
Hot roof
70 °C
87.4% of rated power
393 W
651 W
03
Full specification
Parameter
TWMNH-48HE450
TWMNF-66HD745
Difference
Power and efficiency
Rated power
450 Wp
745 Wp
+295 W for TWMNF-66HD745
Module efficiency
22.50 %
24.00 %
+1.50 pp for TWMNF-66HD745
Power density
225.2 Wp/m²
239.8 Wp/m²
+14.6 Wp/m² for TWMNF-66HD745
Open-circuit voltage
35.95 V
49.95 V
14.00 V apart
Voltage at max power
29.81 V
41.86 V
12.05 V apart
Short-circuit current
15.81 A
18.87 A
3.06 A apart
Current at max power
15.10 A
17.80 A
2.70 A apart
Temperature
Temperature coefficient
-0.280 %/°C
-0.280 %/°C
Same
Mechanical
Dimensions
1762x1134x30 mm
2384x1303x33 mm
1762x1134x30 mm vs 2384x1303x33 mm
Module area
1.998 m²
3.106 m²
1.108 m² apart
Weight
23.7 kg
37.3 kg
-13.6 kg for TWMNH-48HE450
Weight per kWp
52.7 kg/kWp
50.1 kg/kWp
-2.6 kg/kWp for TWMNF-66HD745
Warranty and degradation
Product warranty
15 yrs
12 yrs
+3 yrs for TWMNH-48HE450
Performance warranty
30 yrs
30 yrs
Same
Annual degradation
0.40 %/yr
0.40 %/yr
Same
Technology
Cell technology
N-type
TOPCon
N-type vs TOPCon
Cell type
Monocrystalline
Monocrystalline
Same
Cell count
96
132
36 cells apart
Bifacial
No
Yes
No vs Yes
04
14,129 panels
Against the whole database
Efficiency
#4,281
vs
#329
TWMNF-66HD745 leads by 3,952 places
Power density
#4,284
vs
#366
TWMNF-66HD745 leads by 3,918 places
Heat behaviour
#1,347
vs
#1,347
Tied - the same position in the database
Weight
#6,339
vs
#3,603
TWMNF-66HD745 leads by 2,736 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#8,558
vs
#148
TWMNF-66HD745 leads by 8,410 places
05
Open the full database
More useful comparisons
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Tongwei TWMNH-48HE450 vs Tongwei TWMNH-48HE460
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Tongwei TWMNH-48HE450 vs Tongwei TWMNH-48HE455
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Tongwei TWMNF-66HD745 vs Tongwei TWMNF-66HD750
The same specification on paper
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Tongwei TWMNF-66HD745 vs Tongwei TWMNF-66HD740
One difference: module efficiency
06
Written summary
Checking cache...
07
Questions about this pairing
Which panel is better: Tongwei TWMNH-48HE450 or Tongwei TWMNF-66HD745?
According to our database: Tongwei TWMNF-66HD745 has higher module efficiency (24.00% vs 22.50%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Tongwei TWMNH-48HE450 and Tongwei TWMNF-66HD745?
Tongwei TWMNH-48HE450 has a module efficiency of 22.50%, 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-48HE450 use vs Tongwei TWMNF-66HD745?
Tongwei TWMNH-48HE450 uses N-type 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-48HE450 and Tongwei TWMNF-66HD745?
Tongwei TWMNH-48HE450 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-48HE450 and Tongwei TWMNF-66HD745 bifacial panels?
Tongwei TWMNF-66HD745 is bifacial (captures light from both faces); Tongwei TWMNH-48HE450 is monofacial. Bifacial panels work best on ground mounts or raised structures with a light-coloured surface underneath.
Shop prices: See 56 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.