Skip to main content
TWMNH-66HD655 vs TWMHF-66HD740X 9 of 19 identical Swap Change panels

Tongwei TWMNH-66HD655 vs Tongwei TWMHF-66HD740X

Tongwei TWMNH-66HD655
TWMNH-66HD655
655 Wp 24.20 % N-type Bifacial
Open panel page Datasheet PDF
VS
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. 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 TWMNH-66HD655 TWMHF-66HD740X Difference
Temperature coefficient -0.280 %/°C -0.240 %/°C 0.040 %/°C better in heat
Rated power 655 Wp 740 Wp 85 W more power
Weight 32.2 kg 37.0 kg 4.8 kg lighter
Module efficiency 24.20 % 23.80 % 0.40 pp more efficient
Product warranty 12 yrs 15 yrs 3 yrs longer
Module area 2.701 m² 3.106 m² 0.405 m² apart
Short-circuit current 16.52 A 18.47 A 1.95 A apart
Power density 242.5 Wp/m² 238.2 Wp/m² 4.3 Wp/m² higher
Current at max power 15.68 A 17.49 A 1.81 A apart
Dimensions 2382x1134x30 mm 2384x1303x33 mm 2382x1134x30 mm vs 2384x1303x33 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
TWMNH-66HD655
21,977 kWh
TWMHF-66HD740X
24,925 kWh
Lifetime gap
2,948 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario TWMNH-66HD655 TWMHF-66HD740X
Standard test conditions 25 °C 100.0% of rated power 655 W 740 W
Cool, bright day 40 °C 95.8% of rated power 627 W 713 W
Typical summer roof 55 °C 91.6% of rated power 600 W 687 W
Hot roof 70 °C 87.4% of rated power 572 W 660 W
03

Full specification

Parameter TWMNH-66HD655 TWMHF-66HD740X Difference
Power and efficiency
Rated power 655 Wp 740 Wp +85 W for TWMHF-66HD740X
Module efficiency 24.20 % 23.80 % +0.40 pp for TWMNH-66HD655
Power density 242.5 Wp/m² 238.2 Wp/m² +4.3 Wp/m² for TWMNH-66HD655
Open-circuit voltage 50.15 V 50.62 V Effectively the same
Voltage at max power 41.78 V 42.32 V Effectively the same
Short-circuit current 16.52 A 18.47 A 1.95 A apart
Current at max power 15.68 A 17.49 A 1.81 A apart
Temperature
Temperature coefficient -0.280 %/°C -0.240 %/°C +0.040 %/°C for TWMHF-66HD740X
Mechanical
Dimensions 2382x1134x30 mm 2384x1303x33 mm 2382x1134x30 mm vs 2384x1303x33 mm
Module area 2.701 m² 3.106 m² 0.405 m² apart
Weight 32.2 kg 37.0 kg -4.8 kg for TWMNH-66HD655
Weight per kWp 49.2 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 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
#184 vs #433
TWMNH-66HD655 leads by 249 places
Power density
#172 vs #431
TWMNH-66HD655 leads by 259 places
Heat behaviour
#1,309 vs #13
TWMHF-66HD740X leads by 1,296 places
Weight
#2,776 vs #3,317
TWMNH-66HD655 leads by 541 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#992 vs #130
TWMHF-66HD740X leads by 862 places
05

More useful comparisons

Open the full database
Same series, other bin
Tongwei TWMNH-66HD655 vs Tongwei TWMNF-66HD750
7 differences, the largest is rated power
Same series, other bin
Tongwei TWMNH-66HD655 vs Tongwei TWMNF-66HD745
8 differences, the largest is rated power
Same series, other bin
Tongwei TWMNH-66HD655 vs Tongwei TWMNF-66HD740
9 differences, the largest is rated power
Same series, other bin
Tongwei TWMNH-66HD655 vs Tongwei TWMNF-66HD735
9 differences, the largest is rated power
Same series, other bin
Tongwei TWMNH-66HD655 vs Tongwei TWMHF-66HD735X
10 differences, the largest is temperature coefficient
Same series, other bin
Tongwei TWMNH-66HD655 vs Tongwei TWMHF-66HD730X
10 differences, the largest is temperature coefficient
06

Written summary

07

Questions about this pairing

Which panel is better: Tongwei TWMNH-66HD655 or Tongwei TWMHF-66HD740X?
According to our database: Tongwei TWMNH-66HD655 has higher module efficiency (24.20% 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 TWMNH-66HD655 and Tongwei TWMHF-66HD740X?
Tongwei TWMNH-66HD655 has a module efficiency of 24.20%, 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 TWMNH-66HD655 use vs Tongwei TWMHF-66HD740X?
Tongwei TWMNH-66HD655 uses N-type 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 TWMNH-66HD655 and Tongwei TWMHF-66HD740X?
Tongwei TWMNH-66HD655 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 TWMNH-66HD655 and Tongwei TWMHF-66HD740X bifacial panels?
Both Tongwei TWMNH-66HD655 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.