Tongwei TWMHF-66HD715X vs Tongwei TWMNF-66HD750
VS
The verdict
TWMNF-66HD750 leads on the differences that matter
The largest is module efficiency: 1.10 pp more efficient. 10 of 19 comparable parameters are identical.
See all 9 differencesHow alike are they
10
of 19 comparable
parameters are identical
parameters are identical
identical
differs
01
9 of 19 parameters
What actually differs
Parameter
TWMHF-66HD715X
TWMNF-66HD750
Difference
Module efficiency
23.00 %
24.10 %
1.10 pp more efficient
Temperature coefficient
-0.240 %/°C
-0.280 %/°C
0.040 %/°C better in heat
Power density
230.2 Wp/m²
241.4 Wp/m²
11.3 Wp/m² higher
Rated power
715 Wp
750 Wp
35 W more power
Product warranty
15 yrs
12 yrs
3 yrs longer
Cell technology
N-type
TOPCon
N-type vs TOPCon
Short-circuit current
17.98 A
18.93 A
0.95 A apart
Weight per kWp
51.7 kg/kWp
49.7 kg/kWp
2.0 kg/kWp lighter
Current at max power
17.09 A
17.85 A
0.76 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-66HD715X
24,083 kWh
TWMNF-66HD750
25,164 kWh
Lifetime gap
1,081 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
TWMHF-66HD715X
TWMNF-66HD750
Standard test conditions
25 °C
100.0% of rated power
715 W
750 W
Cool, bright day
40 °C
95.8% of rated power
689 W
719 W
Typical summer roof
55 °C
91.6% of rated power
664 W
687 W
Hot roof
70 °C
87.4% of rated power
638 W
656 W
03
Full specification
Parameter
TWMHF-66HD715X
TWMNF-66HD750
Difference
Power and efficiency
Rated power
715 Wp
750 Wp
+35 W for TWMNF-66HD750
Module efficiency
23.00 %
24.10 %
+1.10 pp for TWMNF-66HD750
Power density
230.2 Wp/m²
241.4 Wp/m²
+11.3 Wp/m² for TWMNF-66HD750
Open-circuit voltage
50.22 V
50.10 V
Effectively the same
Voltage at max power
41.84 V
42.02 V
Effectively the same
Short-circuit current
17.98 A
18.93 A
0.95 A apart
Current at max power
17.09 A
17.85 A
0.76 A apart
Temperature
Temperature coefficient
-0.240 %/°C
-0.280 %/°C
+0.040 %/°C for TWMHF-66HD715X
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
51.7 kg/kWp
49.7 kg/kWp
-2.0 kg/kWp for TWMNF-66HD750
Warranty and degradation
Product warranty
15 yrs
12 yrs
+3 yrs for TWMHF-66HD715X
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
#1,919
vs
#219
TWMNF-66HD750 leads by 1,700 places
Power density
#2,018
vs
#219
TWMNF-66HD750 leads by 1,799 places
Heat behaviour
#13
vs
#1,309
TWMHF-66HD715X leads by 1,296 places
Weight
#5,113
vs
#3,210
TWMNF-66HD750 leads by 1,903 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#443
vs
#122
TWMNF-66HD750 leads by 321 places
05
Open the full database
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The same specification on paper
06
Written summary
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07
Questions about this pairing
Which panel is better: Tongwei TWMHF-66HD715X or Tongwei TWMNF-66HD750?
According to our database: Tongwei TWMNF-66HD750 has higher module efficiency (24.10% vs 23.00%); Tongwei TWMHF-66HD715X 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-66HD715X and Tongwei TWMNF-66HD750?
Tongwei TWMHF-66HD715X has a module efficiency of 23.00%, while Tongwei TWMNF-66HD750 is 24.10%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Tongwei TWMHF-66HD715X use vs Tongwei TWMNF-66HD750?
Tongwei TWMHF-66HD715X uses N-type cells; Tongwei TWMNF-66HD750 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-66HD715X and Tongwei TWMNF-66HD750?
Tongwei TWMHF-66HD715X has a 30 years power warranty; Tongwei TWMNF-66HD750 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-66HD715X and Tongwei TWMNF-66HD750 bifacial panels?
Both Tongwei TWMHF-66HD715X and Tongwei TWMNF-66HD750 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.