TWMNF-66HD750 vs TWMHF-66HD740X 13 of 19 identical Swap Change panels

Tongwei TWMNF-66HD750 vs Tongwei TWMHF-66HD740X

Q: Which panel is better: Tongwei TWMNF-66HD750 or Tongwei TWMHF-66HD740X?

According to our database: Tongwei TWMNF-66HD750 has higher module efficiency (24.10% vs 23.80%); 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.

Q: What is the efficiency of Tongwei TWMNF-66HD750 and Tongwei TWMHF-66HD740X?

Tongwei TWMNF-66HD750 has a module efficiency of 24.10%, while Tongwei TWMHF-66HD740X is 23.80%. Higher efficiency means more electricity from the same roof area - useful when space is limited.

Q: What cell technology does Tongwei TWMNF-66HD750 use vs Tongwei TWMHF-66HD740X?

Tongwei TWMNF-66HD750 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.

Q: What is the warranty on Tongwei TWMNF-66HD750 and Tongwei TWMHF-66HD740X?

Tongwei TWMNF-66HD750 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.

Q: Are Tongwei TWMNF-66HD750 and Tongwei TWMHF-66HD740X bifacial panels?

Both Tongwei TWMNF-66HD750 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.

TWMNF-66HD750

750 Wp 24.10 % TOPCon Bifacial

Open panel page Datasheet PDF

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. 13 of 19 comparable parameters are identical.

See all 6 differences

How alike are they

13 of 19 comparable
parameters are identical

identical differs

What actually differs

6 of 19 parameters

Parameter TWMNF-66HD750 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 24.10 % 23.80 % 0.30 pp more efficient

Cell technology TOPCon N-type TOPCon vs N-type

Power density 241.4 Wp/m² 238.2 Wp/m² 3.2 Wp/m² higher

Rated power 750 Wp 740 Wp 10 W more power

What it means on a roof

Thirty years of production

Each panel's own declared degradation curve, at 1,200 kWh/kWp a year

Cell temperature

TWMNF-66HD750

25,164 kWh

TWMHF-66HD740X

24,925 kWh

Lifetime gap

239 kWh

Output when it is hot

Rated power carried across the range a module actually sees

Scenario TWMNF-66HD750 TWMHF-66HD740X

Standard test conditions 25 °C 100.0% of rated power 750 W 740 W

Cool, bright day 40 °C 95.8% of rated power 719 W 713 W

Typical summer roof 55 °C 91.6% of rated power 687 W 687 W

Hot roof 70 °C 87.4% of rated power 656 W 660 W

Full specification

Parameter TWMNF-66HD750 TWMHF-66HD740X Difference

Power and efficiency

Rated power 750 Wp 740 Wp +10 W for TWMNF-66HD750

Module efficiency 24.10 % 23.80 % +0.30 pp for TWMNF-66HD750

Power density 241.4 Wp/m² 238.2 Wp/m² +3.2 Wp/m² for TWMNF-66HD750

Open-circuit voltage 50.10 V 50.62 V Effectively the same

Voltage at max power 42.02 V 42.32 V Effectively the same

Short-circuit current 18.93 A 18.47 A Effectively the same

Current at max power 17.85 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 49.7 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

Against the whole database

14,005 panels

Efficiency

#219 vs #433

TWMNF-66HD750 leads by 214 places

Power density

#219 vs #431

TWMNF-66HD750 leads by 212 places

Heat behaviour

#1,309 vs #13

TWMHF-66HD740X leads by 1,296 places

Weight

#3,210 vs #3,317

TWMNF-66HD750 leads by 107 places

Warranty

#21 vs #21

Tied - the same position in the database

Overall

#122 vs #130

TWMNF-66HD750 leads by 8 places

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Tongwei TWMHF-66HD740X vs Tongwei TWMHF-66HD730X

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Written summary

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Questions about this pairing

Which panel is better: Tongwei TWMNF-66HD750 or Tongwei TWMHF-66HD740X?

According to our database: Tongwei TWMNF-66HD750 has higher module efficiency (24.10% vs 23.80%); 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-66HD750 and Tongwei TWMHF-66HD740X?

Tongwei TWMNF-66HD750 has a module efficiency of 24.10%, 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-66HD750 use vs Tongwei TWMHF-66HD740X?

Tongwei TWMNF-66HD750 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-66HD750 and Tongwei TWMHF-66HD740X?

Tongwei TWMNF-66HD750 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-66HD750 and Tongwei TWMHF-66HD740X bifacial panels?

Both Tongwei TWMNF-66HD750 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.

Shop prices: See 53 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.