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66Z16/DG-620W vs 625Z16/DG(BW) 17 of 18 identical Swap Change panels

DAH Solar DHN-66Z16/DG-620W vs DAH Solar DHN-625Z16/DG(BW)

DAH Solar DHN-66Z16/DG-620W
DAH Solar
DHN-66Z16/DG-620W
620 Wp 22.96 % TOPCon Bifacial Incomplete
Open panel page Datasheet PDF
VS
DAH Solar
DHN-625Z16/DG(BW)
625 Wp 23.14 % TOPCon Bifacial Incomplete
Open panel page Datasheet PDF
The verdict

One difference, none of them an advantage

The largest is open-circuit voltage: 1.00 V apart. 17 of 18 comparable parameters are identical, with 1 more left out because at least one datasheet does not publish it.

See the one difference
How alike are they
17 of 18 comparable
parameters are identical
identical differs not published
01

What actually differs

1 of 18 parameters
Parameter 66Z16/DG-620W 625Z16/DG(BW) Difference
Open-circuit voltage 49.60 V 48.60 V 1.00 V apart
02

What it means on a roof

Thirty years of production
A 1.0% first-year loss then 0.40% a year, assumed for both panels, 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.
66Z16/DG-620W
20,802 kWh
625Z16/DG(BW)
20,970 kWh
Lifetime gap
168 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario 66Z16/DG-620W 625Z16/DG(BW)
Standard test conditions 25 °C 100.0% of rated power 620 W 625 W
Cool, bright day 40 °C 95.7% of rated power 593 W 598 W
Typical summer roof 55 °C 91.3% of rated power 566 W 571 W
Hot roof 70 °C 87.0% of rated power 539 W 543 W
03

Full specification

Parameter 66Z16/DG-620W 625Z16/DG(BW) Difference
Power and efficiency
Rated power 620 Wp 625 Wp Effectively the same
Module efficiency 22.96 % 23.14 % Effectively the same
Power density 229.5 Wp/m² 231.4 Wp/m² Effectively the same
Open-circuit voltage 49.60 V 48.60 V 1.00 V apart
Voltage at max power 41.30 V 41.30 V Same
Short-circuit current 16.00 A 16.00 A Same
Current at max power 14.92 A 15.01 A Effectively the same
Temperature
Temperature coefficient -0.290 %/°C -0.290 %/°C Same
Mechanical
Dimensions 2382x1134x30 mm 2382x1134x30 mm Same
Module area 2.701 m² 2.701 m² Same
Weight 32.5 kg 32.5 kg Same
Weight per kWp 52.4 kg/kWp 52.0 kg/kWp Effectively the same
Warranty and degradation
Product warranty 15 yrs 15 yrs Same
Performance warranty 30 yrs 30 yrs Same
Annual degradation - - Neither datasheet publishes this
Technology
Cell technology TOPCon TOPCon Same
Cell type Monocrystalline Monocrystalline Same
Cell count 132 132 Same
Bifacial Yes Yes Same
04

Against the whole database

14,129 panels
Efficiency
#2,312 vs #1,554
625Z16/DG(BW) leads by 758 places
Power density
#2,243 vs #1,558
625Z16/DG(BW) leads by 685 places
Heat behaviour
#2,220 vs #2,220
Tied - the same position in the database
Weight
#5,938 vs #5,449
625Z16/DG(BW) leads by 489 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#2,125 vs #1,853
625Z16/DG(BW) leads by 272 places
05

More useful comparisons

Open the full database
Same series, other bin
DAH Solar
DAH Solar DHN-66Z16/DG-620W vs DAH Solar DHN-66Z16/DG-625W
The same specification on paper
Same series, other bin
DAH Solar
DAH Solar DHN-66Z16/DG-620W vs DAH Solar DHN-620Z16/DG(BW)
One difference: open-circuit voltage
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DAH Solar
DAH Solar DHN-66Z16/DG-620W vs DAH Solar DHN-615Z16/DG(BW)
One difference: open-circuit voltage
Same series, other bin
DAH Solar
DAH Solar DHN-66Z16/DG-620W vs DAH Solar DHN-66Z16/DG-615W
The same specification on paper
Same series, other bin
DAH Solar
DAH Solar DHN-66Z16/DG-620W vs DAH Solar DHN-610Z16/DG(BW)
4 differences, the largest is module efficiency
Same series, other bin
DAH Solar
DAH Solar DHN-66Z16/DG-620W vs DAH Solar DHN-66Z16/DG-610W
3 differences, the largest is module efficiency
06

Written summary

07

Questions about this pairing

Which panel is better: DAH Solar DHN-66Z16/DG-620W or DAH Solar DHN-625Z16/DG(BW)?
According to our database: DAH Solar DHN-625Z16/DG(BW) has higher module efficiency (23.14% vs 22.96%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of DAH Solar DHN-66Z16/DG-620W and DAH Solar DHN-625Z16/DG(BW)?
DAH Solar DHN-66Z16/DG-620 W has a module efficiency of 22.96%, while DAH Solar DHN-625Z16/DG(BW) is 23.14%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does DAH Solar DHN-66Z16/DG-620W use vs DAH Solar DHN-625Z16/DG(BW)?
DAH Solar DHN-66Z16/DG-620 W uses TOPCon cells; DAH Solar DHN-625Z16/DG(BW) 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-66Z16/DG-620W and DAH Solar DHN-625Z16/DG(BW)?
DAH Solar DHN-66Z16/DG-620 W has a 30 years power warranty; DAH Solar DHN-625Z16/DG(BW) 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-66Z16/DG-620W and DAH Solar DHN-625Z16/DG(BW) bifacial panels?
Both DAH Solar DHN-66Z16/DG-620 W and DAH Solar DHN-625Z16/DG(BW) 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 7 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.