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TWMHF-66HD730X vs TWMNH-66HD655 9 of 19 identical Swap Change panels

Tongwei TWMHF-66HD730X vs Tongwei TWMNH-66HD655

TWMHF-66HD730X
730 Wp 23.50 % N-type Bifacial
Open panel page Datasheet PDF
VS
Tongwei TWMNH-66HD655
TWMNH-66HD655
655 Wp 24.20 % N-type Bifacial
Open panel page Datasheet PDF
The verdict

10 differences, and they point both ways

The largest is temperature coefficient: 0.040 %/°C better in heat. 9 of 19 comparable parameters are identical.

See all 10 differences
How alike are they
9 of 19 comparable
parameters are identical
identical differs
01

What actually differs

10 of 19 parameters
Parameter TWMHF-66HD730X TWMNH-66HD655 Difference
Temperature coefficient -0.240 %/°C -0.280 %/°C 0.040 %/°C better in heat
Module efficiency 23.50 % 24.20 % 0.70 pp more efficient
Rated power 730 Wp 655 Wp 75 W more power
Weight 37.0 kg 32.2 kg 4.8 kg lighter
Power density 235.0 Wp/m² 242.5 Wp/m² 7.5 Wp/m² higher
Product warranty 15 yrs 12 yrs 3 yrs longer
Module area 3.106 m² 2.701 m² 0.405 m² apart
Short-circuit current 18.28 A 16.52 A 1.76 A apart
Current at max power 17.33 A 15.68 A 1.65 A apart
Dimensions 2384x1303x33 mm 2382x1134x30 mm 2384x1303x33 mm vs 2382x1134x30 mm
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
TWMHF-66HD730X
24,588 kWh
TWMNH-66HD655
21,977 kWh
Lifetime gap
2,611 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario TWMHF-66HD730X TWMNH-66HD655
Standard test conditions 25 °C 100.0% of rated power 730 W 655 W
Cool, bright day 40 °C 95.8% of rated power 704 W 627 W
Typical summer roof 55 °C 91.6% of rated power 677 W 600 W
Hot roof 70 °C 87.4% of rated power 651 W 572 W
03

Full specification

Parameter TWMHF-66HD730X TWMNH-66HD655 Difference
Power and efficiency
Rated power 730 Wp 655 Wp +75 W for TWMHF-66HD730X
Module efficiency 23.50 % 24.20 % +0.70 pp for TWMNH-66HD655
Power density 235.0 Wp/m² 242.5 Wp/m² +7.5 Wp/m² for TWMNH-66HD655
Open-circuit voltage 50.46 V 50.15 V Effectively the same
Voltage at max power 42.13 V 41.78 V Effectively the same
Short-circuit current 18.28 A 16.52 A 1.76 A apart
Current at max power 17.33 A 15.68 A 1.65 A apart
Temperature
Temperature coefficient -0.240 %/°C -0.280 %/°C +0.040 %/°C for TWMHF-66HD730X
Mechanical
Dimensions 2384x1303x33 mm 2382x1134x30 mm 2384x1303x33 mm vs 2382x1134x30 mm
Module area 3.106 m² 2.701 m² 0.405 m² apart
Weight 37.0 kg 32.2 kg -4.8 kg for TWMNH-66HD655
Weight per kWp 50.7 kg/kWp 49.2 kg/kWp Effectively the same
Warranty and degradation
Product warranty 15 yrs 12 yrs +3 yrs for TWMHF-66HD730X
Performance warranty 30 yrs 30 yrs Same
Annual degradation 0.38 %/yr 0.40 %/yr Effectively the same
Technology
Cell technology N-type N-type Same
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 #184
TWMNH-66HD655 leads by 532 places
Power density
#800 vs #172
TWMNH-66HD655 leads by 628 places
Heat behaviour
#13 vs #1,309
TWMHF-66HD730X leads by 1,296 places
Weight
#4,111 vs #2,776
TWMNH-66HD655 leads by 1,335 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#196 vs #992
TWMHF-66HD730X leads by 796 places
05

More useful comparisons

Open the full database
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
Same series, other bin
Tongwei TWMHF-66HD730X vs Tongwei TWMHF-66HD725X
One difference: module efficiency
Same series, other bin
Tongwei TWMHF-66HD730X vs Tongwei TWMHF-66HD720X
3 differences, the largest is module efficiency
Same series, other bin
Tongwei TWMHF-66HD730X vs Tongwei TWMHF-66HD715X
3 differences, the largest is module efficiency
Same series, other bin
Tongwei TWMNH-66HD655 vs Tongwei TWMNF-66HD750
7 differences, the largest is rated power
06

Written summary

07

Questions about this pairing

Which panel is better: Tongwei TWMHF-66HD730X or Tongwei TWMNH-66HD655?
According to our database: Tongwei TWMNH-66HD655 has higher module efficiency (24.20% 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 TWMHF-66HD730X and Tongwei TWMNH-66HD655?
Tongwei TWMHF-66HD730X has a module efficiency of 23.50%, while Tongwei TWMNH-66HD655 is 24.20%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Tongwei TWMHF-66HD730X use vs Tongwei TWMNH-66HD655?
Tongwei TWMHF-66HD730X uses N-type cells; Tongwei TWMNH-66HD655 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 TWMHF-66HD730X and Tongwei TWMNH-66HD655?
Tongwei TWMHF-66HD730X has a 30 years power warranty; Tongwei TWMNH-66HD655 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 TWMHF-66HD730X and Tongwei TWMNH-66HD655 bifacial panels?
Both Tongwei TWMHF-66HD730X and Tongwei TWMNH-66HD655 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.