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66HD740X vs 66HD735X 19 of 19 identical Swap Change panels

Tongwei TWMHF-66HD740X vs Tongwei TWMHF-66HD735X

TWMHF-66HD740X
740 Wp 23.80 % N-type Bifacial
Open panel page Datasheet PDF
VS
TWMHF-66HD735X
735 Wp 23.70 % N-type Bifacial
Open panel page Datasheet PDF
The verdict

Identical on every published parameter

All 19 comparable parameters agree. Two records this alike are usually one panel sold under two names, or two bins of the same production line - decide on price and on who you would rather buy from.

How alike are they
19 of 19 comparable
parameters are identical
identical differs
01

What actually differs

0 of 19 parameters

Every comparable parameter agrees. The full specification is below.

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
Same temp coeff. for both panels (-0.240 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other.
66HD740X
24,925 kWh
66HD735X
24,757 kWh
Lifetime gap
168 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario 66HD740X 66HD735X
Standard test conditions 25 °C 100.0% of rated power 740 W 735 W
Cool, bright day 40 °C 96.4% of rated power 713 W 709 W
Typical summer roof 55 °C 92.8% of rated power 687 W 682 W
Hot roof 70 °C 89.2% of rated power 660 W 656 W
03

Full specification

Parameter 66HD740X 66HD735X Difference
Power and efficiency
Rated power 740 Wp 735 Wp Effectively the same
Module efficiency 23.80 % 23.70 % Effectively the same
Power density 238.2 Wp/m² 236.6 Wp/m² Effectively the same
Open-circuit voltage 50.62 V 50.54 V Effectively the same
Voltage at max power 42.32 V 42.22 V Effectively the same
Short-circuit current 18.47 A 18.37 A Effectively the same
Current at max power 17.49 A 17.41 A Effectively the same
Temperature
Temperature coefficient -0.240 %/°C -0.240 %/°C Same
Mechanical
Dimensions 2384x1303x33 mm 2384x1303x33 mm Same
Module area 3.106 m² 3.106 m² Same
Weight 37.0 kg 37.0 kg Same
Weight per kWp 50.0 kg/kWp 50.3 kg/kWp Effectively the same
Warranty and degradation
Product warranty 15 yrs 15 yrs Same
Performance warranty 30 yrs 30 yrs Same
Annual degradation 0.38 %/yr 0.38 %/yr 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
#433 vs #517
66HD740X leads by 84 places
Power density
#431 vs #582
66HD740X leads by 151 places
Heat behaviour
#13 vs #13
Tied - the same position in the database
Weight
#3,317 vs #3,719
66HD740X leads by 402 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#130 vs #155
66HD740X leads by 25 places
05

More useful comparisons

Open the full database
Same series, other bin
Tongwei TWMHF-66HD740X vs Tongwei TWMHF-66HD730X
3 differences, the largest is module efficiency
Same series, other bin
Tongwei TWMHF-66HD740X vs Tongwei TWMHF-66HD725X
3 differences, the largest is module efficiency
Same series, other bin
Tongwei TWMHF-66HD740X vs Tongwei TWMHF-66HD720X
3 differences, the largest is module efficiency
Same series, other bin
Tongwei TWMHF-66HD740X vs Tongwei TWMHF-66HD715X
3 differences, the largest is module efficiency
Same manufacturer
Tongwei TWMHF-66HD740X vs Tongwei TWMNF-66HD750
6 differences, the largest is temperature coefficient
Same manufacturer
Tongwei TWMHF-66HD740X vs Tongwei TWMNF-66HD745
4 differences, the largest is temperature coefficient
06

Written summary

07

Questions about this pairing

Which panel is better: Tongwei TWMHF-66HD740X or Tongwei TWMHF-66HD735X?
According to our database: Tongwei TWMHF-66HD740X has higher module efficiency (23.80% vs 23.70%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Tongwei TWMHF-66HD740X and Tongwei TWMHF-66HD735X?
Tongwei TWMHF-66HD740X has a module efficiency of 23.80%, while Tongwei TWMHF-66HD735X is 23.70%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Tongwei TWMHF-66HD740X use vs Tongwei TWMHF-66HD735X?
Tongwei TWMHF-66HD740X uses N-type cells; Tongwei TWMHF-66HD735X 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-66HD740X and Tongwei TWMHF-66HD735X?
Tongwei TWMHF-66HD740X has a 30 years power warranty; Tongwei TWMHF-66HD735X 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-66HD740X and Tongwei TWMHF-66HD735X bifacial panels?
Both Tongwei TWMHF-66HD740X and Tongwei TWMHF-66HD735X 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.