Tongwei TWMNF-66HD745 vs Tongwei TWMNH-66HD615
VS
The verdict
TWMNF-66HD745 leads on the differences that matter
The largest is module efficiency: 1.20 pp more efficient. 8 of 19 comparable parameters are identical.
See all 11 differencesHow alike are they
8
of 19 comparable
parameters are identical
parameters are identical
identical
differs
01
11 of 19 parameters
What actually differs
Parameter
TWMNF-66HD745
TWMNH-66HD615
Difference
Module efficiency
24.00 %
22.80 %
1.20 pp more efficient
Rated power
745 Wp
615 Wp
130 W more power
Power density
239.8 Wp/m²
227.7 Wp/m²
12.2 Wp/m² higher
Weight
37.3 kg
32.5 kg
4.8 kg lighter
Short-circuit current
18.87 A
16.00 A
2.87 A apart
Module area
3.106 m²
2.701 m²
0.405 m² apart
Weight per kWp
50.1 kg/kWp
52.8 kg/kWp
2.8 kg/kWp lighter
Current at max power
17.80 A
15.13 A
2.67 A apart
Open-circuit voltage
49.95 V
48.90 V
1.05 V apart
Dimensions
2384x1303x33 mm
2382x1134x30 mm
2384x1303x33 mm vs 2382x1134x30 mm
Voltage at max power
41.86 V
40.65 V
1.21 V 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
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.
TWMNF-66HD745
24,996 kWh
TWMNH-66HD615
20,634 kWh
Lifetime gap
4,362 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
TWMNF-66HD745
TWMNH-66HD615
Standard test conditions
25 °C
100.0% of rated power
745 W
615 W
Cool, bright day
40 °C
95.8% of rated power
714 W
589 W
Typical summer roof
55 °C
91.6% of rated power
682 W
563 W
Hot roof
70 °C
87.4% of rated power
651 W
538 W
03
Full specification
Parameter
TWMNF-66HD745
TWMNH-66HD615
Difference
Power and efficiency
Rated power
745 Wp
615 Wp
+130 W for TWMNF-66HD745
Module efficiency
24.00 %
22.80 %
+1.20 pp for TWMNF-66HD745
Power density
239.8 Wp/m²
227.7 Wp/m²
+12.2 Wp/m² for TWMNF-66HD745
Open-circuit voltage
49.95 V
48.90 V
1.05 V apart
Voltage at max power
41.86 V
40.65 V
1.21 V apart
Short-circuit current
18.87 A
16.00 A
2.87 A apart
Current at max power
17.80 A
15.13 A
2.67 A apart
Temperature
Temperature coefficient
-0.280 %/°C
-0.280 %/°C
Same
Mechanical
Dimensions
2384x1303x33 mm
2382x1134x30 mm
2384x1303x33 mm vs 2382x1134x30 mm
Module area
3.106 m²
2.701 m²
0.405 m² apart
Weight
37.3 kg
32.5 kg
-4.8 kg for TWMNH-66HD615
Weight per kWp
50.1 kg/kWp
52.8 kg/kWp
-2.8 kg/kWp for TWMNF-66HD745
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
#303
vs
#2,714
TWMNF-66HD745 leads by 2,411 places
Power density
#339
vs
#3,077
TWMNF-66HD745 leads by 2,738 places
Heat behaviour
#1,309
vs
#1,309
Tied - the same position in the database
Weight
#3,586
vs
#6,546
TWMNF-66HD745 leads by 2,960 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#148
vs
#2,879
TWMNF-66HD745 leads by 2,731 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-66HD745 or Tongwei TWMNH-66HD615?
According to our database: Tongwei TWMNF-66HD745 has higher module efficiency (24.00% vs 22.80%). 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 TWMNH-66HD615?
Tongwei TWMNF-66HD745 has a module efficiency of 24.00%, while Tongwei TWMNH-66HD615 is 22.80%. 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 TWMNH-66HD615?
Tongwei TWMNF-66HD745 uses TOPCon cells; Tongwei TWMNH-66HD615 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-66HD745 and Tongwei TWMNH-66HD615?
Tongwei TWMNF-66HD745 has a 30 years power warranty; Tongwei TWMNH-66HD615 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 TWMNH-66HD615 bifacial panels?
Both Tongwei TWMNF-66HD745 and Tongwei TWMNH-66HD615 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 70 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.