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M10-72 Monofacial vs G12-66 Bifacial 8 of 18 identical Swap Change panels

Tongwei TNC M10-72 Monofacial vs Tongwei TNC G12-66 Bifacial

TNC M10-72 Monofacial
595 Wp 23.00 % TOPCon
Open panel page Datasheet PDF
VS
TNC G12-66 Bifacial
705 Wp 22.70 % TOPCon
Open panel page Datasheet PDF
The verdict

M10-72 Monofacial leads on the differences that matter

The largest is rated power: 110 W more power. 8 of 18 comparable parameters are identical, with 1 more left out because at least one datasheet does not publish it.

See all 10 differences
How alike are they
8 of 18 comparable
parameters are identical
identical differs not published
01

What actually differs

10 of 18 parameters
Parameter M10-72 Monofacial G12-66 Bifacial Difference
Rated power 595 Wp 705 Wp 110 W more power
Weight 31.5 kg 37.9 kg 6.4 kg lighter
Open-circuit voltage 53.20 V 48.77 V 4.43 V apart
Short-circuit current 14.15 A 18.40 A 4.25 A apart
Module area 2.583 m² 3.106 m² 0.523 m² apart
Module efficiency 23.00 % 22.70 % 0.30 pp more efficient
Power density 230.3 Wp/m² 227.0 Wp/m² 3.4 Wp/m² higher
Current at max power 13.40 A 17.40 A 4.00 A apart
Voltage at max power 44.41 V 40.52 V 3.89 V apart
Dimensions 2278x1134 mm 2384x1303 mm 2278x1134 mm vs 2384x1303 mm
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.
M10-72 Monofacial
19,963 kWh
G12-66 Bifacial
23,654 kWh
Lifetime gap
3,691 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario M10-72 Monofacial G12-66 Bifacial
Standard test conditions 25 °C 100.0% of rated power 595 W 705 W
Cool, bright day 40 °C 95.8% of rated power 570 W 675 W
Typical summer roof 55 °C 91.6% of rated power 545 W 646 W
Hot roof 70 °C 87.4% of rated power 520 W 616 W
03

Full specification

Parameter M10-72 Monofacial G12-66 Bifacial Difference
Power and efficiency
Rated power 595 Wp 705 Wp +110 W for G12-66 Bifacial
Module efficiency 23.00 % 22.70 % +0.30 pp for M10-72 Monofacial
Power density 230.3 Wp/m² 227.0 Wp/m² +3.4 Wp/m² for M10-72 Monofacial
Open-circuit voltage 53.20 V 48.77 V 4.43 V apart
Voltage at max power 44.41 V 40.52 V 3.89 V apart
Short-circuit current 14.15 A 18.40 A 4.25 A apart
Current at max power 13.40 A 17.40 A 4.00 A apart
Temperature
Temperature coefficient -0.280 %/°C -0.280 %/°C Same
Mechanical
Dimensions 2278x1134 mm 2384x1303 mm 2278x1134 mm vs 2384x1303 mm
Module area 2.583 m² 3.106 m² 0.523 m² apart
Weight 31.5 kg 37.9 kg -6.4 kg for M10-72 Monofacial
Weight per kWp 52.9 kg/kWp 53.8 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 - - Neither datasheet publishes this
Bifacial No No Same
04

Against the whole database

14,129 panels
Efficiency
#1,970 vs #3,364
M10-72 Monofacial leads by 1,394 places
Power density
#1,809 vs #3,418
M10-72 Monofacial leads by 1,609 places
Heat behaviour
#1,347 vs #1,347
Tied - the same position in the database
Weight
#6,715 vs #7,887
M10-72 Monofacial leads by 1,172 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#3,400 vs #1,022
G12-66 Bifacial leads by 2,378 places
05

More useful comparisons

Open the full database
Same series, other bin
Tongwei TNC M10-72 Monofacial vs Tongwei THC G12-66 Bifacial
13 differences, the largest is module efficiency
Same series, other bin
Tongwei TNC M10-72 Monofacial vs Tongwei TWMNF-66HD
10 differences, the largest is rated power
Same series, other bin
Tongwei TNC M10-72 Monofacial vs Tongwei TNC G12-66 Monofacial
8 differences, the largest is rated power
Same series, other bin
Tongwei TNC M10-72 Monofacial vs Tongwei TNC M10-78 Bifacial
8 differences, the largest is rated power
Same series, other bin
Tongwei TNC M10-72 Monofacial vs Tongwei TWMNH-66HS
11 differences, the largest is rated power
Same series, other bin
Tongwei TNC M10-72 Monofacial vs Tongwei TWMNH-66HD
11 differences, the largest is rated power
06

Written summary

07

Questions about this pairing

Which panel is better: Tongwei TNC M10-72 Monofacial or Tongwei TNC G12-66 Bifacial?
According to our database: Tongwei TNC M10-72 Monofacial has higher module efficiency (23.00% 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 M10-72 Monofacial and Tongwei TNC G12-66 Bifacial?
Tongwei TNC M10-72 Monofacial has a module efficiency of 23.00%, while Tongwei TNC G12-66 Bifacial is 22.70%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Tongwei TNC M10-72 Monofacial use vs Tongwei TNC G12-66 Bifacial?
Tongwei TNC M10-72 Monofacial uses TOPCon cells; Tongwei TNC G12-66 Bifacial 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 M10-72 Monofacial and Tongwei TNC G12-66 Bifacial?
Tongwei TNC M10-72 Monofacial has a 30 years power warranty; Tongwei TNC G12-66 Bifacial 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.

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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.