TWMNH-66HD615 vs TWMHF-66HD730X 5 of 19 identical Swap Change panels

Tongwei TWMNH-66HD615 vs Tongwei TWMHF-66HD730X

Q: Which panel is better: Tongwei TWMNH-66HD615 or Tongwei TWMHF-66HD730X?

According to our database: Tongwei TWMHF-66HD730X has higher module efficiency (23.50% vs 22.80%); 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 TWMNH-66HD615 and Tongwei TWMHF-66HD730X?

Tongwei TWMNH-66HD615 has a module efficiency of 22.80%, 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 TWMNH-66HD615 use vs Tongwei TWMHF-66HD730X?

Tongwei TWMNH-66HD615 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 TWMNH-66HD615 and Tongwei TWMHF-66HD730X?

Tongwei TWMNH-66HD615 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 TWMNH-66HD615 and Tongwei TWMHF-66HD730X bifacial panels?

Both Tongwei TWMNH-66HD615 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.

TWMNH-66HD615

615 Wp 22.80 % TOPCon Bifacial

Open panel page Datasheet PDF

TWMHF-66HD730X

730 Wp 23.50 % N-type Bifacial

Open panel page Datasheet PDF

The verdict

TWMHF-66HD730X leads on the differences that matter

The largest is temperature coefficient: 0.040 %/°C better in heat. 5 of 19 comparable parameters are identical.

See all 14 differences

How alike are they

5 of 19 comparable
parameters are identical

identical differs

What actually differs

14 of 19 parameters

Parameter TWMNH-66HD615 TWMHF-66HD730X Difference

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

Module efficiency 22.80 % 23.50 % 0.70 pp more efficient

Rated power 615 Wp 730 Wp 115 W more power

Weight 32.5 kg 37.0 kg 4.5 kg lighter

Power density 227.7 Wp/m² 235.0 Wp/m² 7.3 Wp/m² higher

Product warranty 12 yrs 15 yrs 3 yrs longer

Short-circuit current 16.00 A 18.28 A 2.28 A apart

Module area 2.701 m² 3.106 m² 0.405 m² apart

Cell technology TOPCon N-type TOPCon vs N-type

Current at max power 15.13 A 17.33 A 2.20 A apart

Weight per kWp 52.8 kg/kWp 50.7 kg/kWp 2.2 kg/kWp lighter

Open-circuit voltage 48.90 V 50.46 V 1.56 V apart

Dimensions 2382x1134x30 mm 2384x1303x33 mm 2382x1134x30 mm vs 2384x1303x33 mm

Voltage at max power 40.65 V 42.13 V 1.48 V 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

TWMNH-66HD615

20,634 kWh

TWMHF-66HD730X

24,588 kWh

Lifetime gap

3,954 kWh

Output when it is hot

Rated power carried across the range a module actually sees

Scenario TWMNH-66HD615 TWMHF-66HD730X

Standard test conditions 25 °C 100.0% of rated power 615 W 730 W

Cool, bright day 40 °C 95.8% of rated power 589 W 704 W

Typical summer roof 55 °C 91.6% of rated power 563 W 677 W

Hot roof 70 °C 87.4% of rated power 538 W 651 W

Full specification

Parameter TWMNH-66HD615 TWMHF-66HD730X Difference

Power and efficiency

Rated power 615 Wp 730 Wp +115 W for TWMHF-66HD730X

Module efficiency 22.80 % 23.50 % +0.70 pp for TWMHF-66HD730X

Power density 227.7 Wp/m² 235.0 Wp/m² +7.3 Wp/m² for TWMHF-66HD730X

Open-circuit voltage 48.90 V 50.46 V 1.56 V apart

Voltage at max power 40.65 V 42.13 V 1.48 V apart

Short-circuit current 16.00 A 18.28 A 2.28 A apart

Current at max power 15.13 A 17.33 A 2.20 A apart

Temperature

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

Mechanical

Dimensions 2382x1134x30 mm 2384x1303x33 mm 2382x1134x30 mm vs 2384x1303x33 mm

Module area 2.701 m² 3.106 m² 0.405 m² apart

Weight 32.5 kg 37.0 kg -4.5 kg for TWMNH-66HD615

Weight per kWp 52.8 kg/kWp 50.7 kg/kWp -2.2 kg/kWp for TWMHF-66HD730X

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

#2,714 vs #716

TWMHF-66HD730X leads by 1,998 places

Power density

#3,077 vs #800

TWMHF-66HD730X leads by 2,277 places

Heat behaviour

#1,309 vs #13

TWMHF-66HD730X leads by 1,296 places

Weight

#6,546 vs #4,111

TWMHF-66HD730X leads by 2,435 places

Warranty

#21 vs #21

Tied - the same position in the database

Overall

#2,879 vs #196

TWMHF-66HD730X leads by 2,683 places

More useful comparisons

Open the full database

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Tongwei TWMNH-66HD615 vs Tongwei TWMNF-66HD740

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Tongwei TWMNH-66HD615 vs Tongwei TWMHF-66HD740X

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Tongwei TWMNH-66HD615 vs Tongwei TWMHF-66HD735X

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Written summary

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Questions about this pairing

Which panel is better: Tongwei TWMNH-66HD615 or Tongwei TWMHF-66HD730X?

According to our database: Tongwei TWMHF-66HD730X has higher module efficiency (23.50% vs 22.80%); 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 TWMNH-66HD615 and Tongwei TWMHF-66HD730X?

Tongwei TWMNH-66HD615 has a module efficiency of 22.80%, 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 TWMNH-66HD615 use vs Tongwei TWMHF-66HD730X?

Tongwei TWMNH-66HD615 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 TWMNH-66HD615 and Tongwei TWMHF-66HD730X?

Tongwei TWMNH-66HD615 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 TWMNH-66HD615 and Tongwei TWMHF-66HD730X bifacial panels?

Both Tongwei TWMNH-66HD615 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 70 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.