Tongwei TWMNF-66HD750 vs Tongwei TWMHF-66HD715X
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
TWMNF-66HD750
TWMHF-66HD715X
Difference
Module efficiency
24.10 %
23.00 %
1.10 pp more efficient
Temperature coefficient
-0.280 %/°C
-0.240 %/°C
0.040 %/°C better in heat
Power density
241.4 Wp/m²
230.2 Wp/m²
11.3 Wp/m² higher
Rated power
750 Wp
715 Wp
35 W more power
Product warranty
12 yrs
15 yrs
3 yrs longer
Cell technology
TOPCon
N-type
TOPCon vs N-type
Short-circuit current
18.93 A
17.98 A
0.95 A apart
Weight per kWp
49.7 kg/kWp
51.7 kg/kWp
2.0 kg/kWp lighter
Current at max power
17.85 A
17.09 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
TWMNF-66HD750
25,164 kWh
TWMHF-66HD715X
24,083 kWh
Lifetime gap
1,081 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
TWMNF-66HD750
TWMHF-66HD715X
Standard test conditions
25 °C
100.0% of rated power
750 W
715 W
Cool, bright day
40 °C
95.8% of rated power
719 W
689 W
Typical summer roof
55 °C
91.6% of rated power
687 W
664 W
Hot roof
70 °C
87.4% of rated power
656 W
638 W
03
Full specification
Parameter
TWMNF-66HD750
TWMHF-66HD715X
Difference
Power and efficiency
Rated power
750 Wp
715 Wp
+35 W for TWMNF-66HD750
Module efficiency
24.10 %
23.00 %
+1.10 pp for TWMNF-66HD750
Power density
241.4 Wp/m²
230.2 Wp/m²
+11.3 Wp/m² for TWMNF-66HD750
Open-circuit voltage
50.10 V
50.22 V
Effectively the same
Voltage at max power
42.02 V
41.84 V
Effectively the same
Short-circuit current
18.93 A
17.98 A
0.95 A apart
Current at max power
17.85 A
17.09 A
0.76 A apart
Temperature
Temperature coefficient
-0.280 %/°C
-0.240 %/°C
+0.040 %/°C for TWMHF-66HD715X
Mechanical
Dimensions
2384x1303x33 mm
2384x1303x33 mm
Same
Module area
3.106 m²
3.106 m²
Same
Weight
37.3 kg
37.0 kg
Effectively the same
Weight per kWp
49.7 kg/kWp
51.7 kg/kWp
-2.0 kg/kWp for TWMNF-66HD750
Warranty and degradation
Product warranty
12 yrs
15 yrs
+3 yrs for TWMHF-66HD715X
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
#219
vs
#1,919
TWMNF-66HD750 leads by 1,700 places
Power density
#219
vs
#2,018
TWMNF-66HD750 leads by 1,799 places
Heat behaviour
#1,309
vs
#13
TWMHF-66HD715X leads by 1,296 places
Weight
#3,210
vs
#5,113
TWMNF-66HD750 leads by 1,903 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#122
vs
#443
TWMNF-66HD750 leads by 321 places
05
Open the full database
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06
Written summary
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07
Questions about this pairing
Which panel is better: Tongwei TWMNF-66HD750 or Tongwei TWMHF-66HD715X?
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 TWMNF-66HD750 and Tongwei TWMHF-66HD715X?
Tongwei TWMNF-66HD750 has a module efficiency of 24.10%, while Tongwei TWMHF-66HD715X is 23.00%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Tongwei TWMNF-66HD750 use vs Tongwei TWMHF-66HD715X?
Tongwei TWMNF-66HD750 uses TOPCon cells; Tongwei TWMHF-66HD715X 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-66HD750 and Tongwei TWMHF-66HD715X?
Tongwei TWMNF-66HD750 has a 30 years power warranty; Tongwei TWMHF-66HD715X 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-66HD750 and Tongwei TWMHF-66HD715X bifacial panels?
Both Tongwei TWMNF-66HD750 and Tongwei TWMHF-66HD715X 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.