TWMNF-66HD745 vs TWMHF-66HD730X 12 of 19 identical Swap Change panels

Tongwei TWMNF-66HD745 vs Tongwei TWMHF-66HD730X

Q: Which panel is better: Tongwei TWMNF-66HD745 or Tongwei TWMHF-66HD730X?

According to our database: Tongwei TWMNF-66HD745 has higher module efficiency (24.00% vs 23.50%); Tongwei TWMHF-66HD730X 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-66HD745 and Tongwei TWMHF-66HD730X?

Tongwei TWMNF-66HD745 has a module efficiency of 24.00%, while Tongwei TWMHF-66HD730X is 23.50%. Higher efficiency means more electricity from the same roof area - useful when space is limited.

Q: What cell technology does Tongwei TWMNF-66HD745 use vs Tongwei TWMHF-66HD730X?

Tongwei TWMNF-66HD745 uses TOPCon cells; Tongwei TWMHF-66HD730X 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-66HD745 and Tongwei TWMHF-66HD730X?

Tongwei TWMNF-66HD745 has a 30 years power warranty; Tongwei TWMHF-66HD730X 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-66HD745 and Tongwei TWMHF-66HD730X bifacial panels?

Both Tongwei TWMNF-66HD745 and Tongwei TWMHF-66HD730X 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-66HD745

745 Wp 24.00 % TOPCon Bifacial

Open panel page Datasheet PDF

TWMHF-66HD730X

730 Wp 23.50 % N-type Bifacial

Open panel page Datasheet PDF

The verdict

7 differences, and they point both ways

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

What actually differs

7 of 19 parameters

Parameter TWMNF-66HD745 TWMHF-66HD730X Difference

Temperature coefficient -0.280 %/°C -0.240 %/°C 0.040 %/°C better in heat

Module efficiency 24.00 % 23.50 % 0.50 pp more efficient

Product warranty 12 yrs 15 yrs 3 yrs longer

Power density 239.8 Wp/m² 235.0 Wp/m² 4.8 Wp/m² higher

Rated power 745 Wp 730 Wp 15 W more power

Cell technology TOPCon N-type TOPCon vs N-type

Short-circuit current 18.87 A 18.28 A 0.59 A apart

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-66HD745

24,996 kWh

TWMHF-66HD730X

24,588 kWh

Lifetime gap

408 kWh

Output when it is hot

Rated power carried across the range a module actually sees

Scenario TWMNF-66HD745 TWMHF-66HD730X

Standard test conditions 25 °C 100.0% of rated power 745 W 730 W

Cool, bright day 40 °C 95.8% of rated power 714 W 704 W

Typical summer roof 55 °C 91.6% of rated power 682 W 677 W

Hot roof 70 °C 87.4% of rated power 651 W 651 W

Full specification

Parameter TWMNF-66HD745 TWMHF-66HD730X Difference

Power and efficiency

Rated power 745 Wp 730 Wp +15 W for TWMNF-66HD745

Module efficiency 24.00 % 23.50 % +0.50 pp for TWMNF-66HD745

Power density 239.8 Wp/m² 235.0 Wp/m² +4.8 Wp/m² for TWMNF-66HD745

Open-circuit voltage 49.95 V 50.46 V Effectively the same

Voltage at max power 41.86 V 42.13 V Effectively the same

Short-circuit current 18.87 A 18.28 A 0.59 A apart

Current at max power 17.80 A 17.33 A Effectively the same

Temperature

Temperature coefficient -0.280 %/°C -0.240 %/°C +0.040 %/°C for TWMHF-66HD730X

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 50.1 kg/kWp 50.7 kg/kWp Effectively the same

Warranty and degradation

Product warranty 12 yrs 15 yrs +3 yrs for TWMHF-66HD730X

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

#303 vs #716

TWMNF-66HD745 leads by 413 places

Power density

#339 vs #800

TWMNF-66HD745 leads by 461 places

Heat behaviour

#1,309 vs #13

TWMHF-66HD730X leads by 1,296 places

Weight

#3,586 vs #4,111

TWMNF-66HD745 leads by 525 places

Warranty

#21 vs #21

Tied - the same position in the database

Overall

#148 vs #196

TWMNF-66HD745 leads by 48 places

More useful comparisons

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Tongwei TWMNF-66HD745 vs Tongwei TWMNF-66HD735

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Same series, other bin

Tongwei TWMNF-66HD745 vs Tongwei TWMNF-66HD730

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Same series, other bin

Tongwei TWMHF-66HD730X vs Tongwei TWMHF-66HD740X

3 differences, the largest is module efficiency

Same series, other bin

Tongwei TWMHF-66HD730X vs Tongwei TWMHF-66HD735X

One difference: module efficiency

Written summary

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Questions about this pairing

Which panel is better: Tongwei TWMNF-66HD745 or Tongwei TWMHF-66HD730X?

According to our database: Tongwei TWMNF-66HD745 has higher module efficiency (24.00% vs 23.50%); Tongwei TWMHF-66HD730X 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-66HD745 and Tongwei TWMHF-66HD730X?

Tongwei TWMNF-66HD745 has a module efficiency of 24.00%, while Tongwei TWMHF-66HD730X is 23.50%. Higher efficiency means more electricity from the same roof area - useful when space is limited.

What cell technology does Tongwei TWMNF-66HD745 use vs Tongwei TWMHF-66HD730X?

Tongwei TWMNF-66HD745 uses TOPCon cells; Tongwei TWMHF-66HD730X 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-66HD745 and Tongwei TWMHF-66HD730X?

Tongwei TWMNF-66HD745 has a 30 years power warranty; Tongwei TWMHF-66HD730X 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-66HD745 and Tongwei TWMHF-66HD730X bifacial panels?

Both Tongwei TWMNF-66HD745 and Tongwei TWMHF-66HD730X 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 71 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.