Tongwei TWMNF-66HD745 vs Tongwei TWMHF-66HD725X
VS
The verdict
8 differences, and they point both ways
The largest is temperature coefficient: 0.040 %/°C better in heat. 11 of 19 comparable parameters are identical.
See all 8 differencesHow alike are they
11
of 19 comparable
parameters are identical
parameters are identical
identical
differs
01
8 of 19 parameters
What actually differs
Parameter
TWMNF-66HD745
TWMHF-66HD725X
Difference
Temperature coefficient
-0.280 %/°C
-0.240 %/°C
0.040 %/°C better in heat
Module efficiency
24.00 %
23.30 %
0.70 pp more efficient
Product warranty
12 yrs
15 yrs
3 yrs longer
Power density
239.8 Wp/m²
233.4 Wp/m²
6.4 Wp/m² higher
Rated power
745 Wp
725 Wp
20 W more power
Cell technology
TOPCon
N-type
TOPCon vs N-type
Short-circuit current
18.87 A
18.18 A
0.69 A apart
Current at max power
17.80 A
17.25 A
0.55 A apart
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
TWMNF-66HD745
24,996 kWh
TWMHF-66HD725X
24,420 kWh
Lifetime gap
576 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
TWMNF-66HD745
TWMHF-66HD725X
Standard test conditions
25 °C
100.0% of rated power
745 W
725 W
Cool, bright day
40 °C
95.8% of rated power
714 W
699 W
Typical summer roof
55 °C
91.6% of rated power
682 W
673 W
Hot roof
70 °C
87.4% of rated power
651 W
647 W
03
Full specification
Parameter
TWMNF-66HD745
TWMHF-66HD725X
Difference
Power and efficiency
Rated power
745 Wp
725 Wp
+20 W for TWMNF-66HD745
Module efficiency
24.00 %
23.30 %
+0.70 pp for TWMNF-66HD745
Power density
239.8 Wp/m²
233.4 Wp/m²
+6.4 Wp/m² for TWMNF-66HD745
Open-circuit voltage
49.95 V
50.38 V
Effectively the same
Voltage at max power
41.86 V
42.03 V
Effectively the same
Short-circuit current
18.87 A
18.18 A
0.69 A apart
Current at max power
17.80 A
17.25 A
0.55 A apart
Temperature
Temperature coefficient
-0.280 %/°C
-0.240 %/°C
+0.040 %/°C for TWMHF-66HD725X
Mechanical
Dimensions
2384x1303x33 mm
2384x1303x33 mm
Same
Module area
3.106 m²
3.106 m²
Same
Weight
37.3 kg
37.0 kg
Effectively the same
Weight per kWp
50.1 kg/kWp
51.0 kg/kWp
Effectively the same
Warranty and degradation
Product warranty
12 yrs
15 yrs
+3 yrs for TWMHF-66HD725X
Performance warranty
30 yrs
30 yrs
Same
Annual degradation
0.40 %/yr
0.38 %/yr
Effectively the same
Technology
Cell technology
TOPCon
N-type
TOPCon vs N-type
Cell type
Monocrystalline
Monocrystalline
Same
Cell count
132
132
Same
Bifacial
Yes
Yes
Same
04
14,005 panels
Against the whole database
Efficiency
#303
vs
#1,017
TWMNF-66HD745 leads by 714 places
Power density
#339
vs
#936
TWMNF-66HD745 leads by 597 places
Heat behaviour
#1,309
vs
#13
TWMHF-66HD725X leads by 1,296 places
Weight
#3,586
vs
#4,382
TWMNF-66HD745 leads by 796 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#148
vs
#263
TWMNF-66HD745 leads by 115 places
05
Open the full database
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Tongwei TWMNF-66HD745 vs Tongwei TWMNF-66HD735
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3 differences, the largest is module efficiency
Same series, other bin
Tongwei TWMHF-66HD725X vs Tongwei TWMHF-66HD735X
3 differences, the largest is module efficiency
06
Written summary
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07
Questions about this pairing
Which panel is better: Tongwei TWMNF-66HD745 or Tongwei TWMHF-66HD725X?
According to our database: Tongwei TWMNF-66HD745 has higher module efficiency (24.00% vs 23.30%); Tongwei TWMHF-66HD725X tolerates heat better (temp coeff -0.240%/°C vs -0.280%/°C). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Tongwei TWMNF-66HD745 and Tongwei TWMHF-66HD725X?
Tongwei TWMNF-66HD745 has a module efficiency of 24.00%, while Tongwei TWMHF-66HD725X is 23.30%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Tongwei TWMNF-66HD745 use vs Tongwei TWMHF-66HD725X?
Tongwei TWMNF-66HD745 uses TOPCon cells; Tongwei TWMHF-66HD725X uses N-type. 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-66HD745 and Tongwei TWMHF-66HD725X?
Tongwei TWMNF-66HD745 has a 30 years power warranty; Tongwei TWMHF-66HD725X 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-66HD745 and Tongwei TWMHF-66HD725X bifacial panels?
Both Tongwei TWMNF-66HD745 and Tongwei TWMHF-66HD725X 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.
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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.