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TWMNF-66HD740 vs TWMHF-66HD735X 16 of 19 identical Swap Change panels

Tongwei TWMNF-66HD740 vs Tongwei TWMHF-66HD735X

Tongwei TWMNF-66HD740
TWMNF-66HD740
740 Wp 23.80 % TOPCon Bifacial
Open panel page Datasheet PDF
VS
TWMHF-66HD735X
735 Wp 23.70 % N-type Bifacial
Open panel page Datasheet PDF
The verdict

TWMHF-66HD735X leads on the differences that matter

The largest is temperature coefficient: 0.040 %/°C better in heat. 16 of 19 comparable parameters are identical.

See all 3 differences
How alike are they
16 of 19 comparable
parameters are identical
identical differs
01

What actually differs

3 of 19 parameters
Parameter TWMNF-66HD740 TWMHF-66HD735X Difference
Temperature coefficient -0.280 %/°C -0.240 %/°C 0.040 %/°C better in heat
Product warranty 12 yrs 15 yrs 3 yrs longer
Cell technology TOPCon N-type TOPCon vs N-type
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-66HD740
24,828 kWh
TWMHF-66HD735X
24,757 kWh
Lifetime gap
71 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario TWMNF-66HD740 TWMHF-66HD735X
Standard test conditions 25 °C 100.0% of rated power 740 W 735 W
Cool, bright day 40 °C 95.8% of rated power 709 W 709 W
Typical summer roof 55 °C 91.6% of rated power 678 W 682 W
Hot roof 70 °C 87.4% of rated power 647 W 656 W
03

Full specification

Parameter TWMNF-66HD740 TWMHF-66HD735X Difference
Power and efficiency
Rated power 740 Wp 735 Wp Effectively the same
Module efficiency 23.80 % 23.70 % Effectively the same
Power density 238.2 Wp/m² 236.6 Wp/m² Effectively the same
Open-circuit voltage 49.80 V 50.54 V Effectively the same
Voltage at max power 41.69 V 42.22 V Effectively the same
Short-circuit current 18.81 A 18.37 A Effectively the same
Current at max power 17.75 A 17.41 A Effectively the same
Temperature
Temperature coefficient -0.280 %/°C -0.240 %/°C +0.040 %/°C for TWMHF-66HD735X
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 50.4 kg/kWp 50.3 kg/kWp Effectively the same
Warranty and degradation
Product warranty 12 yrs 15 yrs +3 yrs for TWMHF-66HD735X
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
#433 vs #517
TWMNF-66HD740 leads by 84 places
Power density
#431 vs #582
TWMNF-66HD740 leads by 151 places
Heat behaviour
#1,309 vs #13
TWMHF-66HD735X leads by 1,296 places
Weight
#3,784 vs #3,719
TWMHF-66HD735X leads by 65 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#183 vs #155
TWMHF-66HD735X leads by 28 places
05

More useful comparisons

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

Written summary

07

Questions about this pairing

Which panel is better: Tongwei TWMNF-66HD740 or Tongwei TWMHF-66HD735X?
According to our database: Tongwei TWMNF-66HD740 has higher module efficiency (23.80% vs 23.70%); Tongwei TWMHF-66HD735X 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-66HD740 and Tongwei TWMHF-66HD735X?
Tongwei TWMNF-66HD740 has a module efficiency of 23.80%, while Tongwei TWMHF-66HD735X is 23.70%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Tongwei TWMNF-66HD740 use vs Tongwei TWMHF-66HD735X?
Tongwei TWMNF-66HD740 uses TOPCon cells; Tongwei TWMHF-66HD735X 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-66HD740 and Tongwei TWMHF-66HD735X?
Tongwei TWMNF-66HD740 has a 30 years power warranty; Tongwei TWMHF-66HD735X 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-66HD740 and Tongwei TWMHF-66HD735X bifacial panels?
Both Tongwei TWMNF-66HD740 and Tongwei TWMHF-66HD735X 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.