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66Z16/DG-615W vs 615Z16/DG(BW) 17 of 18 identical Swap Change panels

DAH Solar DHN-66Z16/DG-615W vs DAH Solar DHN-615Z16/DG(BW)

DAH Solar DHN-66Z16/DG-615W
DAH Solar
DHN-66Z16/DG-615W
615 Wp 22.77 % TOPCon Bifacial Incomplete
Open panel page Datasheet PDF
VS
DAH Solar
DHN-615Z16/DG(BW)
615 Wp 22.77 % 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-615W 615Z16/DG(BW) Difference
Open-circuit voltage 49.20 V 48.20 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-615W
20,634 kWh
615Z16/DG(BW)
20,634 kWh
Lifetime gap
No difference
Output when it is hot
Rated power carried across the range a module actually sees
Scenario 66Z16/DG-615W 615Z16/DG(BW)
Standard test conditions 25 °C 100.0% of rated power 615 W 615 W
Cool, bright day 40 °C 95.7% of rated power 588 W 588 W
Typical summer roof 55 °C 91.3% of rated power 561 W 561 W
Hot roof 70 °C 87.0% of rated power 535 W 535 W
03

Full specification

Parameter 66Z16/DG-615W 615Z16/DG(BW) Difference
Power and efficiency
Rated power 615 Wp 615 Wp Same
Module efficiency 22.77 % 22.77 % Same
Power density 227.7 Wp/m² 227.7 Wp/m² Same
Open-circuit voltage 49.20 V 48.20 V 1.00 V apart
Voltage at max power 41.10 V 40.90 V Effectively the same
Short-circuit current 15.94 A 15.88 A Effectively the same
Current at max power 14.90 A 14.91 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 52.8 kg/kWp 52.8 kg/kWp 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
#3,129 vs #3,129
Tied - the same position in the database
Power density
#3,132 vs #3,132
Tied - the same position in the database
Heat behaviour
#2,220 vs #2,220
Tied - the same position in the database
Weight
#6,602 vs #6,602
Tied - the same position in the database
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#2,394 vs #2,394
Tied - the same position in the database
05

More useful comparisons

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

Written summary

07

Questions about this pairing

Which panel is better: DAH Solar DHN-66Z16/DG-615W or DAH Solar DHN-615Z16/DG(BW)?
According to our database: both panels are closely matched on key specs - the decision often comes down to price and local availability. 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-615W and DAH Solar DHN-615Z16/DG(BW)?
DAH Solar DHN-66Z16/DG-615 W has a module efficiency of 22.77%, while DAH Solar DHN-615Z16/DG(BW) 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-66Z16/DG-615W use vs DAH Solar DHN-615Z16/DG(BW)?
DAH Solar DHN-66Z16/DG-615 W uses TOPCon cells; DAH Solar DHN-615Z16/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-615W and DAH Solar DHN-615Z16/DG(BW)?
DAH Solar DHN-66Z16/DG-615 W has a 30 years power warranty; DAH Solar DHN-615Z16/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-615W and DAH Solar DHN-615Z16/DG(BW) bifacial panels?
Both DAH Solar DHN-66Z16/DG-615 W and DAH Solar DHN-615Z16/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.