DAH Solar DHN-615Z16/DG(BW) vs DAH Solar DHN-590Z16/DG(BW)
VS
The verdict
615Z16/DG(BW) leads on the differences that matter
The largest is module efficiency: 0.93 pp more efficient. 12 of 18 comparable parameters are identical, with 1 more left out because at least one datasheet does not publish it.
See all 6 differencesHow alike are they
12
of 18 comparable
parameters are identical
parameters are identical
identical
differs
not published
01
6 of 18 parameters
What actually differs
Parameter
615Z16/DG(BW)
590Z16/DG(BW)
Difference
Module efficiency
22.77 %
21.84 %
0.93 pp more efficient
Power density
227.7 Wp/m²
218.4 Wp/m²
9.3 Wp/m² higher
Rated power
615 Wp
590 Wp
25 W more power
Weight per kWp
52.8 kg/kWp
55.1 kg/kWp
2.2 kg/kWp lighter
Open-circuit voltage
48.20 V
47.20 V
1.00 V apart
Voltage at max power
40.90 V
39.70 V
1.20 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.
615Z16/DG(BW)
20,634 kWh
590Z16/DG(BW)
19,796 kWh
Lifetime gap
838 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
615Z16/DG(BW)
590Z16/DG(BW)
Standard test conditions
25 °C
100.0% of rated power
615 W
590 W
Cool, bright day
40 °C
95.7% of rated power
588 W
564 W
Typical summer roof
55 °C
91.3% of rated power
561 W
539 W
Hot roof
70 °C
87.0% of rated power
535 W
513 W
03
Full specification
Parameter
615Z16/DG(BW)
590Z16/DG(BW)
Difference
Power and efficiency
Rated power
615 Wp
590 Wp
+25 W for 615Z16/DG(BW)
Module efficiency
22.77 %
21.84 %
+0.93 pp for 615Z16/DG(BW)
Power density
227.7 Wp/m²
218.4 Wp/m²
+9.3 Wp/m² for 615Z16/DG(BW)
Open-circuit voltage
48.20 V
47.20 V
1.00 V apart
Voltage at max power
40.90 V
39.70 V
1.20 V apart
Short-circuit current
15.88 A
15.64 A
Effectively the same
Current at max power
14.91 A
14.71 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
55.1 kg/kWp
-2.2 kg/kWp for 615Z16/DG(BW)
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
14,129 panels
Against the whole database
Efficiency
#3,129
vs
#7,048
615Z16/DG(BW) leads by 3,919 places
Power density
#3,132
vs
#7,017
615Z16/DG(BW) leads by 3,885 places
Heat behaviour
#2,220
vs
#2,220
Tied - the same position in the database
Weight
#6,602
vs
#9,587
615Z16/DG(BW) leads by 2,985 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#2,394
vs
#4,334
615Z16/DG(BW) leads by 1,940 places
05
Open the full database
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06
Written summary
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07
Questions about this pairing
Which panel is better: DAH Solar DHN-615Z16/DG(BW) or DAH Solar DHN-590Z16/DG(BW)?
According to our database: DAH Solar DHN-615Z16/DG(BW) has higher module efficiency (22.77% vs 21.84%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of DAH Solar DHN-615Z16/DG(BW) and DAH Solar DHN-590Z16/DG(BW)?
DAH Solar DHN-615Z16/DG(BW) has a module efficiency of 22.77%, while DAH Solar DHN-590Z16/DG(BW) is 21.84%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does DAH Solar DHN-615Z16/DG(BW) use vs DAH Solar DHN-590Z16/DG(BW)?
DAH Solar DHN-615Z16/DG(BW) uses TOPCon cells; DAH Solar DHN-590Z16/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-615Z16/DG(BW) and DAH Solar DHN-590Z16/DG(BW)?
DAH Solar DHN-615Z16/DG(BW) has a 30 years power warranty; DAH Solar DHN-590Z16/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-615Z16/DG(BW) and DAH Solar DHN-590Z16/DG(BW) bifacial panels?
Both DAH Solar DHN-615Z16/DG(BW) and DAH Solar DHN-590Z16/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.