Tongwei TWMNF-66HD710XX vs Tongwei TWMNF-66HD715XX
VS
The verdict
Identical on every published parameter
All 18 comparable parameters agree, with 1 more left out because at least one datasheet does not publish it. 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
18
of 18 comparable
parameters are identical
parameters are identical
identical
differs
not published
01
0 of 18 parameters
What actually differs
Every comparable parameter agrees. The full specification is below.
02
What it means on a roof
Thirty years of production
Declared first-year losses, with 0.40% a year afterwards assumed for both panels, at 1,200 kWh/kWp a year
Same temp coeff. for both panels (-0.280 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other.
66HD710XX
23,822 kWh
66HD715XX
23,990 kWh
Lifetime gap
168 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
66HD710XX
66HD715XX
Standard test conditions
25 °C
100.0% of rated power
710 W
715 W
Cool, bright day
40 °C
95.8% of rated power
680 W
685 W
Typical summer roof
55 °C
91.6% of rated power
650 W
655 W
Hot roof
70 °C
87.4% of rated power
621 W
625 W
03
Full specification
Parameter
66HD710XX
66HD715XX
Difference
Power and efficiency
Rated power
710 Wp
715 Wp
Effectively the same
Module efficiency
22.90 %
23.00 %
Effectively the same
Power density
228.6 Wp/m²
230.2 Wp/m²
Effectively the same
Open-circuit voltage
48.94 V
49.11 V
Effectively the same
Voltage at max power
40.69 V
40.69 V
Same
Short-circuit current
18.59 A
18.55 A
Effectively the same
Current at max power
17.64 A
17.60 A
Effectively the same
Temperature
Temperature coefficient
-0.280 %/°C
-0.280 %/°C
Same
Mechanical
Dimensions
2384x1303x33 mm
2384x1303x33 mm
Same
Module area
3.106 m²
3.106 m²
Same
Weight
37.9 kg
37.9 kg
Same
Weight per kWp
53.4 kg/kWp
53.0 kg/kWp
Effectively the same
Warranty and degradation
Product warranty
12 yrs
12 yrs
Same
Performance warranty
30 yrs
30 yrs
Same
Annual degradation
-
-
Neither datasheet publishes this
Technology
Cell technology
N-type
N-type
Same
Cell type
Monocrystalline
Monocrystalline
Same
Cell count
132
132
Same
Bifacial
Yes
Yes
Same
04
14,005 panels
Against the whole database
Efficiency
#2,359
vs
#1,919
66HD715XX leads by 440 places
Power density
#2,474
vs
#2,018
66HD715XX leads by 456 places
Heat behaviour
#1,309
vs
#1,309
Tied - the same position in the database
Weight
#7,271
vs
#6,744
66HD715XX leads by 527 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#817
vs
#678
66HD715XX leads by 139 places
05
Open the full database
More useful comparisons
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Tongwei TWMNF-66HD710XX vs Tongwei TWMNF-66HD700XX
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Tongwei TWMNF-66HD710XX vs Tongwei TWMNF-66HD745
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06
Written summary
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07
Questions about this pairing
Which panel is better: Tongwei TWMNF-66HD710XX or Tongwei TWMNF-66HD715XX?
According to our database: Tongwei TWMNF-66HD715XX has higher module efficiency (23.00% vs 22.90%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Tongwei TWMNF-66HD710XX and Tongwei TWMNF-66HD715XX?
Tongwei TWMNF-66HD710XX has a module efficiency of 22.90%, while Tongwei TWMNF-66HD715XX is 23.00%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Tongwei TWMNF-66HD710XX use vs Tongwei TWMNF-66HD715XX?
Tongwei TWMNF-66HD710XX uses N-type cells; Tongwei TWMNF-66HD715XX 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-66HD710XX and Tongwei TWMNF-66HD715XX?
Tongwei TWMNF-66HD710XX has a 30 years power warranty; Tongwei TWMNF-66HD715XX 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-66HD710XX and Tongwei TWMNF-66HD715XX bifacial panels?
Both Tongwei TWMNF-66HD710XX and Tongwei TWMNF-66HD715XX 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 55 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.