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48Z16/DG(BW)-425 vs 66Y18/DG-725 6 of 19 identical Swap Change panels

DAH Solar DHN-48Z16/DG(BW)-425 vs DAH Solar DHN-66Y18/DG-725

DAH Solar
DHN-48Z16/DG(BW)-425
425 Wp 21.27 % TOPCon Bifacial
Open panel page Datasheet PDF
VS
DAH Solar
DHN-66Y18/DG-725
725 Wp 23.34 % TOPCon Bifacial
Open panel page Datasheet PDF
The verdict

66Y18/DG-725 leads on the differences that matter

The largest is module efficiency: 2.07 pp more efficient. 6 of 19 comparable parameters are identical.

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

What actually differs

13 of 19 parameters
Parameter 48Z16/DG(BW)-425 66Y18/DG-725 Difference
Module efficiency 21.27 % 23.34 % 2.07 pp more efficient
Rated power 425 Wp 725 Wp 300 W more power
Power density 212.7 Wp/m² 233.4 Wp/m² 20.7 Wp/m² higher
Weight 23.9 kg 36.7 kg 12.8 kg lighter
Product warranty 25 yrs 15 yrs 10 yrs longer
Weight per kWp 56.2 kg/kWp 50.6 kg/kWp 5.6 kg/kWp lighter
Open-circuit voltage 35.00 V 48.60 V 13.60 V apart
Short-circuit current 15.34 A 18.79 A 3.45 A apart
Module area 1.998 m² 3.106 m² 1.108 m² apart
Voltage at max power 29.60 V 41.00 V 11.40 V apart
Current at max power 14.36 A 17.68 A 3.32 A apart
Cell count 96 132 36 cells apart
Dimensions 1762x1134x30 mm 2384x1303x33 mm 1762x1134x30 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
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.
48Z16/DG(BW)-425
14,260 kWh
66Y18/DG-725
24,325 kWh
Lifetime gap
10,065 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario 48Z16/DG(BW)-425 66Y18/DG-725
Standard test conditions 25 °C 100.0% of rated power 425 W 725 W
Cool, bright day 40 °C 95.7% of rated power 407 W 693 W
Typical summer roof 55 °C 91.3% of rated power 388 W 662 W
Hot roof 70 °C 87.0% of rated power 370 W 630 W
03

Full specification

Parameter 48Z16/DG(BW)-425 66Y18/DG-725 Difference
Power and efficiency
Rated power 425 Wp 725 Wp +300 W for 66Y18/DG-725
Module efficiency 21.27 % 23.34 % +2.07 pp for 66Y18/DG-725
Power density 212.7 Wp/m² 233.4 Wp/m² +20.7 Wp/m² for 66Y18/DG-725
Open-circuit voltage 35.00 V 48.60 V 13.60 V apart
Voltage at max power 29.60 V 41.00 V 11.40 V apart
Short-circuit current 15.34 A 18.79 A 3.45 A apart
Current at max power 14.36 A 17.68 A 3.32 A apart
Temperature
Temperature coefficient -0.290 %/°C -0.290 %/°C Same
Mechanical
Dimensions 1762x1134x30 mm 2384x1303x33 mm 1762x1134x30 mm vs 2384x1303x33 mm
Module area 1.998 m² 3.106 m² 1.108 m² apart
Weight 23.9 kg 36.7 kg -12.8 kg for 48Z16/DG(BW)-425
Weight per kWp 56.2 kg/kWp 50.6 kg/kWp -5.6 kg/kWp for 66Y18/DG-725
Warranty and degradation
Product warranty 25 yrs 15 yrs +10 yrs for 48Z16/DG(BW)-425
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 96 132 36 cells apart
Bifacial Yes Yes Same
04

Against the whole database

14,005 panels
Efficiency
#8,849 vs #943
66Y18/DG-725 leads by 7,906 places
Power density
#8,733 vs #936
66Y18/DG-725 leads by 7,797 places
Heat behaviour
#2,165 vs #2,165
Tied - the same position in the database
Weight
#10,505 vs #4,067
66Y18/DG-725 leads by 6,438 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#8,711 vs #251
66Y18/DG-725 leads by 8,460 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)-455
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)-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
06

Written summary

07

Questions about this pairing

Which panel is better: DAH Solar DHN-48Z16/DG(BW)-425 or DAH Solar DHN-66Y18/DG-725?
According to our database: DAH Solar DHN-66Y18/DG-725 has higher module efficiency (23.34% 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-66Y18/DG-725?
DAH Solar DHN-48Z16/DG(BW)-425 has a module efficiency of 21.27%, while DAH Solar DHN-66Y18/DG-725 is 23.34%. 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-66Y18/DG-725?
DAH Solar DHN-48Z16/DG(BW)-425 uses TOPCon cells; DAH Solar DHN-66Y18/DG-725 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-66Y18/DG-725?
DAH Solar DHN-48Z16/DG(BW)-425 has a 30 years power warranty; DAH Solar DHN-66Y18/DG-725 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-66Y18/DG-725 bifacial panels?
Both DAH Solar DHN-48Z16/DG(BW)-425 and DAH Solar DHN-66Y18/DG-725 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 11 DAH Solar 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.