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425 vs 455 13 of 19 identical Swap Change panels

DAH Solar DHN-48Z16/DG(BW)-425 vs DAH Solar DHN-48Z16/DG(BW)-455

DAH Solar
DHN-48Z16/DG(BW)-425
425 Wp 21.27 % TOPCon Bifacial
Open panel page Datasheet PDF
VS
DAH Solar
DHN-48Z16/DG(BW)-455
455 Wp 22.77 % TOPCon Bifacial
Open panel page Datasheet PDF
The verdict

455 leads on the differences that matter

The largest is module efficiency: 1.50 pp more efficient. 13 of 19 comparable parameters are identical.

See all 6 differences
How alike are they
13 of 19 comparable
parameters are identical
identical differs
01

What actually differs

6 of 19 parameters
Parameter 425 455 Difference
Module efficiency 21.27 % 22.77 % 1.50 pp more efficient
Power density 212.7 Wp/m² 227.7 Wp/m² 15.0 Wp/m² higher
Rated power 425 Wp 455 Wp 30 W more power
Weight per kWp 56.2 kg/kWp 52.5 kg/kWp 3.7 kg/kWp lighter
Open-circuit voltage 35.00 V 36.20 V 1.20 V apart
Voltage at max power 29.60 V 30.80 V 1.20 V apart
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 (-0.290 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other.
425
14,260 kWh
455
15,266 kWh
Lifetime gap
1,006 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario 425 455
Standard test conditions 25 °C 100.0% of rated power 425 W 455 W
Cool, bright day 40 °C 95.7% of rated power 407 W 435 W
Typical summer roof 55 °C 91.3% of rated power 388 W 415 W
Hot roof 70 °C 87.0% of rated power 370 W 396 W
03

Full specification

Parameter 425 455 Difference
Power and efficiency
Rated power 425 Wp 455 Wp +30 W for 455
Module efficiency 21.27 % 22.77 % +1.50 pp for 455
Power density 212.7 Wp/m² 227.7 Wp/m² +15.0 Wp/m² for 455
Open-circuit voltage 35.00 V 36.20 V 1.20 V apart
Voltage at max power 29.60 V 30.80 V 1.20 V apart
Short-circuit current 15.34 A 15.70 A Effectively the same
Current at max power 14.36 A 14.77 A Effectively the same
Temperature
Temperature coefficient -0.290 %/°C -0.290 %/°C Same
Mechanical
Dimensions 1762x1134x30 mm 1762x1134x30 mm Same
Module area 1.998 m² 1.998 m² Same
Weight 23.9 kg 23.9 kg Same
Weight per kWp 56.2 kg/kWp 52.5 kg/kWp -3.7 kg/kWp for 455
Warranty and degradation
Product warranty 25 yrs 25 yrs Same
Performance warranty 30 yrs 30 yrs Same
Annual degradation 0.40 %/yr 0.40 %/yr Same
Technology
Cell technology TOPCon TOPCon Same
Cell type Monocrystalline Monocrystalline Same
Cell count 96 96 Same
Bifacial Yes Yes Same
04

Against the whole database

14,005 panels
Efficiency
#8,849 vs #3,073
455 leads by 5,776 places
Power density
#8,733 vs #2,888
455 leads by 5,845 places
Heat behaviour
#2,165 vs #2,165
Tied - the same position in the database
Weight
#10,505 vs #6,129
455 leads by 4,376 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#8,711 vs #5,689
455 leads by 3,022 places
05

More useful comparisons

Open the full database
Same series, other bin
DAH Solar
DAH Solar DHN-48Z16/DG(BW)-425 vs DAH Solar DHN-48Z16/DG(BW)-450
6 differences, the largest is module efficiency
Same series, other bin
DAH Solar
DAH Solar DHN-48Z16/DG(BW)-425 vs DAH Solar DHN-48Z16/DG(BW)-445
4 differences, the largest is module efficiency
Same series, other bin
DAH Solar
DAH Solar DHN-48Z16/DG(BW)-425 vs DAH Solar DHN-48Z16/DG(BW)-440
3 differences, the largest is module efficiency
Same series, other bin
DAH Solar
DAH Solar DHN-48Z16/DG(BW)-425 vs DAH Solar DHN-48Z16/DG(BW)-435
3 differences, the largest is module efficiency
Same series, other bin
DAH Solar
DAH Solar DHN-48Z16/DG(BW)-425 vs DAH Solar DHN-48Z16/DG(BW)-430
One difference: module efficiency
Same manufacturer
DAH Solar
DAH Solar DHN-48Z16/DG(BW)-425 vs DAH Solar DHN-66Y18/DG-725
13 differences, the largest is module efficiency
06

Written summary

07

Questions about this pairing

Which panel is better: DAH Solar DHN-48Z16/DG(BW)-425 or DAH Solar DHN-48Z16/DG(BW)-455?
According to our database: DAH Solar DHN-48Z16/DG(BW)-455 has higher module efficiency (22.77% vs 21.27%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of DAH Solar DHN-48Z16/DG(BW)-425 and DAH Solar DHN-48Z16/DG(BW)-455?
DAH Solar DHN-48Z16/DG(BW)-425 has a module efficiency of 21.27%, while DAH Solar DHN-48Z16/DG(BW)-455 is 22.77%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does DAH Solar DHN-48Z16/DG(BW)-425 use vs DAH Solar DHN-48Z16/DG(BW)-455?
DAH Solar DHN-48Z16/DG(BW)-425 uses TOPCon cells; DAH Solar DHN-48Z16/DG(BW)-455 uses TOPCon. 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 DAH Solar DHN-48Z16/DG(BW)-425 and DAH Solar DHN-48Z16/DG(BW)-455?
DAH Solar DHN-48Z16/DG(BW)-425 has a 30 years power warranty; DAH Solar DHN-48Z16/DG(BW)-455 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 DAH Solar DHN-48Z16/DG(BW)-425 and DAH Solar DHN-48Z16/DG(BW)-455 bifacial panels?
Both DAH Solar DHN-48Z16/DG(BW)-425 and DAH Solar DHN-48Z16/DG(BW)-455 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.