Tongwei TWMNF-66HD750 vs Tongwei TWMNF-66HD745
VS
The verdict
Identical on every published parameter
All 19 comparable parameters agree. Two records this alike are usually one panel sold under two names, or two bins of the same production line - decide on price and on who you would rather buy from.
How alike are they
19
of 19 comparable
parameters are identical
parameters are identical
identical
differs
01
0 of 19 parameters
What actually differs
Every comparable parameter agrees. The full specification is below.
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.
66HD750
25,164 kWh
66HD745
24,996 kWh
Lifetime gap
168 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
66HD750
66HD745
Standard test conditions
25 °C
100.0% of rated power
750 W
745 W
Cool, bright day
40 °C
95.8% of rated power
719 W
714 W
Typical summer roof
55 °C
91.6% of rated power
687 W
682 W
Hot roof
70 °C
87.4% of rated power
656 W
651 W
03
Full specification
Parameter
66HD750
66HD745
Difference
Power and efficiency
Rated power
750 Wp
745 Wp
Effectively the same
Module efficiency
24.10 %
24.00 %
Effectively the same
Power density
241.4 Wp/m²
239.8 Wp/m²
Effectively the same
Open-circuit voltage
50.10 V
49.95 V
Effectively the same
Voltage at max power
42.02 V
41.86 V
Effectively the same
Short-circuit current
18.93 A
18.87 A
Effectively the same
Current at max power
17.85 A
17.80 A
Effectively the same
Temperature
Temperature coefficient
-0.280 %/°C
-0.280 %/°C
Same
Mechanical
Dimensions
2384x1303x33 mm
2384x1303x33 mm
Same
Module area
3.106 m²
3.106 m²
Same
Weight
37.3 kg
37.3 kg
Same
Weight per kWp
49.7 kg/kWp
50.1 kg/kWp
Effectively the same
Warranty and degradation
Product warranty
12 yrs
12 yrs
Same
Performance warranty
30 yrs
30 yrs
Same
Annual degradation
0.40 %/yr
0.40 %/yr
Same
Technology
Cell technology
TOPCon
TOPCon
Same
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
#303
66HD750 leads by 84 places
Power density
#219
vs
#339
66HD750 leads by 120 places
Heat behaviour
#1,309
vs
#1,309
Tied - the same position in the database
Weight
#3,210
vs
#3,586
66HD750 leads by 376 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#122
vs
#148
66HD750 leads by 26 places
05
Open the full database
More useful comparisons
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Tongwei TWMNF-66HD750 vs Tongwei TWMNF-66HD730
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Tongwei TWMNF-66HD750 vs Tongwei TWMHF-66HD740X
6 differences, the largest is temperature coefficient
Same manufacturer
Tongwei TWMNF-66HD750 vs Tongwei THC G12-66 Bifacial
4 differences, the largest is product warranty
Same manufacturer
Tongwei TWMNF-66HD750 vs Tongwei TWMHF-66HD735X
7 differences, the largest is temperature coefficient
06
Written summary
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07
Questions about this pairing
Which panel is better: Tongwei TWMNF-66HD750 or Tongwei TWMNF-66HD745?
According to our database: Tongwei TWMNF-66HD750 has higher module efficiency (24.10% vs 24.00%). 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 TWMNF-66HD745?
Tongwei TWMNF-66HD750 has a module efficiency of 24.10%, 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 TWMNF-66HD750 use vs Tongwei TWMNF-66HD745?
Tongwei TWMNF-66HD750 uses TOPCon 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 TWMNF-66HD750 and Tongwei TWMNF-66HD745?
Tongwei TWMNF-66HD750 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 TWMNF-66HD750 and Tongwei TWMNF-66HD745 bifacial panels?
Both Tongwei TWMNF-66HD750 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.