Tongwei TWMHF-66HD730X vs Tongwei TWMNF-66HD745
VS
The verdict
7 differences, and they point both ways
The largest is temperature coefficient: 0.040 %/°C better in heat. 12 of 19 comparable parameters are identical.
See all 7 differencesHow alike are they
12
of 19 comparable
parameters are identical
parameters are identical
identical
differs
01
7 of 19 parameters
What actually differs
Parameter
TWMHF-66HD730X
TWMNF-66HD745
Difference
Temperature coefficient
-0.240 %/°C
-0.280 %/°C
0.040 %/°C better in heat
Module efficiency
23.50 %
24.00 %
0.50 pp more efficient
Product warranty
15 yrs
12 yrs
3 yrs longer
Power density
235.0 Wp/m²
239.8 Wp/m²
4.8 Wp/m² higher
Rated power
730 Wp
745 Wp
15 W more power
Cell technology
N-type
TOPCon
N-type vs TOPCon
Short-circuit current
18.28 A
18.87 A
0.59 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
TWMHF-66HD730X
24,588 kWh
TWMNF-66HD745
24,996 kWh
Lifetime gap
408 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
TWMHF-66HD730X
TWMNF-66HD745
Standard test conditions
25 °C
100.0% of rated power
730 W
745 W
Cool, bright day
40 °C
95.8% of rated power
704 W
714 W
Typical summer roof
55 °C
91.6% of rated power
677 W
682 W
Hot roof
70 °C
87.4% of rated power
651 W
651 W
03
Full specification
Parameter
TWMHF-66HD730X
TWMNF-66HD745
Difference
Power and efficiency
Rated power
730 Wp
745 Wp
+15 W for TWMNF-66HD745
Module efficiency
23.50 %
24.00 %
+0.50 pp for TWMNF-66HD745
Power density
235.0 Wp/m²
239.8 Wp/m²
+4.8 Wp/m² for TWMNF-66HD745
Open-circuit voltage
50.46 V
49.95 V
Effectively the same
Voltage at max power
42.13 V
41.86 V
Effectively the same
Short-circuit current
18.28 A
18.87 A
0.59 A apart
Current at max power
17.33 A
17.80 A
Effectively the same
Temperature
Temperature coefficient
-0.240 %/°C
-0.280 %/°C
+0.040 %/°C for TWMHF-66HD730X
Mechanical
Dimensions
2384x1303x33 mm
2384x1303x33 mm
Same
Module area
3.106 m²
3.106 m²
Same
Weight
37.0 kg
37.3 kg
Effectively the same
Weight per kWp
50.7 kg/kWp
50.1 kg/kWp
Effectively the same
Warranty and degradation
Product warranty
15 yrs
12 yrs
+3 yrs for TWMHF-66HD730X
Performance warranty
30 yrs
30 yrs
Same
Annual degradation
0.38 %/yr
0.40 %/yr
Effectively the same
Technology
Cell technology
N-type
TOPCon
N-type vs TOPCon
Cell type
Monocrystalline
Monocrystalline
Same
Cell count
132
132
Same
Bifacial
Yes
Yes
Same
04
14,005 panels
Against the whole database
Efficiency
#716
vs
#303
TWMNF-66HD745 leads by 413 places
Power density
#800
vs
#339
TWMNF-66HD745 leads by 461 places
Heat behaviour
#13
vs
#1,309
TWMHF-66HD730X leads by 1,296 places
Weight
#4,111
vs
#3,586
TWMNF-66HD745 leads by 525 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#196
vs
#148
TWMNF-66HD745 leads by 48 places
05
Open the full database
More useful comparisons
Same series, other bin
Tongwei TWMHF-66HD730X vs Tongwei TWMHF-66HD740X
3 differences, the largest is module efficiency
Same series, other bin
Tongwei TWMHF-66HD730X vs Tongwei TWMHF-66HD735X
One difference: module efficiency
Same series, other bin
Tongwei TWMHF-66HD730X vs Tongwei TWMHF-66HD725X
One difference: module efficiency
Same series, other bin
Tongwei TWMHF-66HD730X vs Tongwei TWMHF-66HD720X
3 differences, the largest is module efficiency
Same series, other bin
Tongwei TWMHF-66HD730X vs Tongwei TWMHF-66HD715X
3 differences, the largest is module efficiency
Same series, other bin
Tongwei TWMNF-66HD745 vs Tongwei TWMNF-66HD750
The same specification on paper
06
Written summary
Checking cache...
07
Questions about this pairing
Which panel is better: Tongwei TWMHF-66HD730X or Tongwei TWMNF-66HD745?
According to our database: Tongwei TWMNF-66HD745 has higher module efficiency (24.00% vs 23.50%); Tongwei TWMHF-66HD730X 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 TWMHF-66HD730X and Tongwei TWMNF-66HD745?
Tongwei TWMHF-66HD730X has a module efficiency of 23.50%, 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 TWMHF-66HD730X use vs Tongwei TWMNF-66HD745?
Tongwei TWMHF-66HD730X 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 TWMHF-66HD730X and Tongwei TWMNF-66HD745?
Tongwei TWMHF-66HD730X 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 TWMHF-66HD730X and Tongwei TWMNF-66HD745 bifacial panels?
Both Tongwei TWMHF-66HD730X 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.