Tongwei TNC G12-66 Bifacial vs Tongwei TWMNH-66HS
VS
The verdict
TWMNH-66HS leads on the differences that matter
The largest is rated power: 80 W more power. 6 of 17 comparable parameters are identical, with 2 more left out because at least one datasheet does not publish them.
See all 11 differencesHow alike are they
6
of 17 comparable
parameters are identical
parameters are identical
identical
differs
not published
01
11 of 17 parameters
What actually differs
Parameter
TNC G12-66 Bifacial
TWMNH-66HS
Difference
Rated power
705 Wp
625 Wp
80 W more power
Weight
37.9 kg
29.0 kg
8.9 kg lighter
Weight per kWp
53.8 kg/kWp
46.4 kg/kWp
7.4 kg/kWp lighter
Module efficiency
22.70 %
23.14 %
0.44 pp more efficient
Product warranty
12 yrs
15 yrs
3 yrs longer
Short-circuit current
18.40 A
16.14 A
2.26 A apart
Module area
3.106 m²
2.701 m²
0.405 m² apart
Power density
227.0 Wp/m²
231.4 Wp/m²
4.4 Wp/m² higher
Current at max power
17.40 A
15.33 A
2.07 A apart
Bifacial
No
Yes
No vs Yes
Dimensions
2384x1303 mm
2382x1134x30 mm
2384x1303 mm vs 2382x1134x30 mm
02
What it means on a roof
Thirty years of production
A 1.0% first-year loss then 0.40% a year, assumed for both panels, 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.
TNC G12-66 Bifacial
23,654 kWh
TWMNH-66HS
20,970 kWh
Lifetime gap
2,684 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
TNC G12-66 Bifacial
TWMNH-66HS
Standard test conditions
25 °C
100.0% of rated power
705 W
625 W
Cool, bright day
40 °C
95.8% of rated power
675 W
599 W
Typical summer roof
55 °C
91.6% of rated power
646 W
573 W
Hot roof
70 °C
87.4% of rated power
616 W
546 W
03
Full specification
Parameter
TNC G12-66 Bifacial
TWMNH-66HS
Difference
Power and efficiency
Rated power
705 Wp
625 Wp
+80 W for TNC G12-66 Bifacial
Module efficiency
22.70 %
23.14 %
+0.44 pp for TWMNH-66HS
Power density
227.0 Wp/m²
231.4 Wp/m²
+4.4 Wp/m² for TWMNH-66HS
Open-circuit voltage
48.77 V
49.25 V
Effectively the same
Voltage at max power
40.52 V
40.77 V
Effectively the same
Short-circuit current
18.40 A
16.14 A
2.26 A apart
Current at max power
17.40 A
15.33 A
2.07 A apart
Temperature
Temperature coefficient
-0.280 %/°C
-0.280 %/°C
Same
Mechanical
Dimensions
2384x1303 mm
2382x1134x30 mm
2384x1303 mm vs 2382x1134x30 mm
Module area
3.106 m²
2.701 m²
0.405 m² apart
Weight
37.9 kg
29.0 kg
-8.9 kg for TWMNH-66HS
Weight per kWp
53.8 kg/kWp
46.4 kg/kWp
-7.4 kg/kWp for TWMNH-66HS
Warranty and degradation
Product warranty
12 yrs
15 yrs
+3 yrs for TWMNH-66HS
Performance warranty
30 yrs
30 yrs
Same
Annual degradation
0.40 %/yr
-
Not published by Tongwei
Technology
Cell technology
TOPCon
TOPCon
Same
Cell type
Monocrystalline
Monocrystalline
Same
Cell count
-
132
Not published by Tongwei
Bifacial
No
Yes
No vs Yes
04
14,005 panels
Against the whole database
Efficiency
#3,307
vs
#1,509
TWMNH-66HS leads by 1,798 places
Power density
#3,361
vs
#1,513
TWMNH-66HS leads by 1,848 places
Heat behaviour
#1,309
vs
#1,309
Tied - the same position in the database
Weight
#7,811
vs
#1,141
TWMNH-66HS leads by 6,670 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#1,007
vs
#1,789
TNC G12-66 Bifacial leads by 782 places
05
Open the full database
More useful comparisons
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Tongwei TNC G12-66 Bifacial vs Tongwei THC G12-66 Bifacial
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Tongwei TNC G12-66 Bifacial vs Tongwei TNC G12-66 Monofacial
One difference: module efficiency
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Tongwei TNC G12-66 Bifacial vs Tongwei TNC M10-78 Bifacial
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Same series, other bin
Tongwei TNC G12-66 Bifacial vs Tongwei TWMNH-66HD
10 differences, the largest is rated power
Same series, other bin
Tongwei TNC G12-66 Bifacial vs Tongwei TNC G12R-66 Monofacial
8 differences, the largest is rated power
06
Written summary
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07
Questions about this pairing
Which panel is better: Tongwei TNC G12-66 Bifacial or Tongwei TWMNH-66HS?
According to our database: Tongwei TWMNH-66HS has higher module efficiency (23.14% vs 22.70%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Tongwei TNC G12-66 Bifacial and Tongwei TWMNH-66HS?
Tongwei TNC G12-66 Bifacial has a module efficiency of 22.70%, while Tongwei TWMNH-66HS is 23.14%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Tongwei TNC G12-66 Bifacial use vs Tongwei TWMNH-66HS?
Tongwei TNC G12-66 Bifacial uses TOPCon cells; Tongwei TWMNH-66HS 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 TNC G12-66 Bifacial and Tongwei TWMNH-66HS?
Tongwei TNC G12-66 Bifacial has a 30 years power warranty; Tongwei TWMNH-66HS 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 TNC G12-66 Bifacial and Tongwei TWMNH-66HS bifacial panels?
Tongwei TWMNH-66HS is bifacial (captures light from both faces); Tongwei TNC G12-66 Bifacial is monofacial. Bifacial panels work best on ground mounts or raised structures with a light-coloured surface underneath.
Shop prices: See 72 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.