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TWMNF-66HD730 vs TWMHF-66HD740X 12 of 19 identical Swap Change panels

Tongwei TWMNF-66HD730 vs Tongwei TWMHF-66HD740X

Tongwei TWMNF-66HD730
TWMNF-66HD730
730 Wp 23.50 % TOPCon Bifacial
Open panel page Datasheet PDF
VS
TWMHF-66HD740X
740 Wp 23.80 % N-type Bifacial
Open panel page Datasheet PDF
The verdict

TWMHF-66HD740X leads on the differences that matter

The largest is temperature coefficient: 0.040 %/°C better in heat. 12 of 19 comparable parameters are identical.

See all 7 differences
How alike are they
12 of 19 comparable
parameters are identical
identical differs
01

What actually differs

7 of 19 parameters
Parameter TWMNF-66HD730 TWMHF-66HD740X Difference
Temperature coefficient -0.280 %/°C -0.240 %/°C 0.040 %/°C better in heat
Product warranty 12 yrs 15 yrs 3 yrs longer
Module efficiency 23.50 % 23.80 % 0.30 pp more efficient
Cell technology TOPCon N-type TOPCon vs N-type
Power density 235.0 Wp/m² 238.2 Wp/m² 3.2 Wp/m² higher
Rated power 730 Wp 740 Wp 10 W more power
Open-circuit voltage 49.55 V 50.62 V 1.07 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
TWMNF-66HD730
24,493 kWh
TWMHF-66HD740X
24,925 kWh
Lifetime gap
432 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario TWMNF-66HD730 TWMHF-66HD740X
Standard test conditions 25 °C 100.0% of rated power 730 W 740 W
Cool, bright day 40 °C 95.8% of rated power 699 W 713 W
Typical summer roof 55 °C 91.6% of rated power 669 W 687 W
Hot roof 70 °C 87.4% of rated power 638 W 660 W
03

Full specification

Parameter TWMNF-66HD730 TWMHF-66HD740X Difference
Power and efficiency
Rated power 730 Wp 740 Wp +10 W for TWMHF-66HD740X
Module efficiency 23.50 % 23.80 % +0.30 pp for TWMHF-66HD740X
Power density 235.0 Wp/m² 238.2 Wp/m² +3.2 Wp/m² for TWMHF-66HD740X
Open-circuit voltage 49.55 V 50.62 V 1.07 V apart
Voltage at max power 41.37 V 42.32 V Effectively the same
Short-circuit current 18.68 A 18.47 A Effectively the same
Current at max power 17.65 A 17.49 A Effectively the same
Temperature
Temperature coefficient -0.280 %/°C -0.240 %/°C +0.040 %/°C for TWMHF-66HD740X
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 51.1 kg/kWp 50.0 kg/kWp Effectively the same
Warranty and degradation
Product warranty 12 yrs 15 yrs +3 yrs for TWMHF-66HD740X
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

Against the whole database

14,005 panels
Efficiency
#716 vs #433
TWMHF-66HD740X leads by 283 places
Power density
#800 vs #431
TWMHF-66HD740X leads by 369 places
Heat behaviour
#1,309 vs #13
TWMHF-66HD740X leads by 1,296 places
Weight
#4,435 vs #3,317
TWMHF-66HD740X leads by 1,118 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#302 vs #130
TWMHF-66HD740X leads by 172 places
05

More useful comparisons

Open the full database
Same series, other bin
Tongwei TWMNF-66HD730 vs Tongwei TWMNF-66HD750
3 differences, the largest is module efficiency
Same series, other bin
Tongwei TWMNF-66HD730 vs Tongwei TWMNF-66HD745
3 differences, the largest is module efficiency
Same series, other bin
Tongwei TWMNF-66HD730 vs Tongwei TWMNF-66HD740
3 differences, the largest is module efficiency
Same series, other bin
Tongwei TWMNF-66HD730 vs Tongwei TWMNF-66HD735
One difference: module efficiency
Same series, other bin
Tongwei TWMHF-66HD740X vs Tongwei TWMHF-66HD735X
The same specification on paper
Same series, other bin
Tongwei TWMHF-66HD740X vs Tongwei TWMHF-66HD730X
3 differences, the largest is module efficiency
06

Written summary

07

Questions about this pairing

Which panel is better: Tongwei TWMNF-66HD730 or Tongwei TWMHF-66HD740X?
According to our database: Tongwei TWMHF-66HD740X has higher module efficiency (23.80% vs 23.50%); Tongwei TWMHF-66HD740X 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-66HD730 and Tongwei TWMHF-66HD740X?
Tongwei TWMNF-66HD730 has a module efficiency of 23.50%, while Tongwei TWMHF-66HD740X is 23.80%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Tongwei TWMNF-66HD730 use vs Tongwei TWMHF-66HD740X?
Tongwei TWMNF-66HD730 uses TOPCon cells; Tongwei TWMHF-66HD740X 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-66HD730 and Tongwei TWMHF-66HD740X?
Tongwei TWMNF-66HD730 has a 30 years power warranty; Tongwei TWMHF-66HD740X 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-66HD730 and Tongwei TWMHF-66HD740X bifacial panels?
Both Tongwei TWMNF-66HD730 and Tongwei TWMHF-66HD740X 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.