Aptos Solar DNA-144-BF10-550W-DG vs Aptos Solar DNA-144-BF10-540W-DG
VS
The verdict
550W-DG leads on the differences that matter
The largest is module efficiency: 0.39 pp more efficient. 16 of 19 comparable parameters are identical.
See all 3 differencesHow alike are they
16
of 19 comparable
parameters are identical
parameters are identical
identical
differs
01
3 of 19 parameters
What actually differs
Parameter
550W-DG
540W-DG
Difference
Module efficiency
21.29 %
20.90 %
0.39 pp more efficient
Power density
212.9 Wp/m²
209.0 Wp/m²
3.9 Wp/m² higher
Rated power
550 Wp
540 Wp
10 W more power
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 (-0.335 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other.
550W-DG
17,859 kWh
540W-DG
17,535 kWh
Lifetime gap
324 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
550W-DG
540W-DG
Standard test conditions
25 °C
100.0% of rated power
550 W
540 W
Cool, bright day
40 °C
95.0% of rated power
522 W
513 W
Typical summer roof
55 °C
90.0% of rated power
495 W
486 W
Hot roof
70 °C
84.9% of rated power
467 W
459 W
03
Full specification
Parameter
550W-DG
540W-DG
Difference
Power and efficiency
Rated power
550 Wp
540 Wp
+10 W for 550W-DG
Module efficiency
21.29 %
20.90 %
+0.39 pp for 550W-DG
Power density
212.9 Wp/m²
209.0 Wp/m²
+3.9 Wp/m² for 550W-DG
Open-circuit voltage
49.80 V
49.50 V
Effectively the same
Voltage at max power
44.15 V
43.84 V
Effectively the same
Short-circuit current
13.99 A
13.85 A
Effectively the same
Current at max power
12.45 A
12.32 A
Effectively the same
Temperature
Temperature coefficient
-0.335 %/°C
-0.335 %/°C
Same
Mechanical
Dimensions
2278x1134x35 mm
2278x1134x35 mm
Same
Module area
2.583 m²
2.583 m²
Same
Weight
32.3 kg
32.3 kg
Same
Weight per kWp
58.7 kg/kWp
59.8 kg/kWp
Effectively the same
Warranty and degradation
Product warranty
30 yrs
30 yrs
Same
Performance warranty
30 yrs
30 yrs
Same
Annual degradation
0.54 %/yr
0.54 %/yr
Same
Technology
Cell technology
PERC
PERC
Same
Cell type
Monocrystalline
Monocrystalline
Same
Cell count
144
144
Same
Bifacial
Yes
Yes
Same
04
14,005 panels
Against the whole database
Efficiency
#8,708
vs
#10,072
550W-DG leads by 1,364 places
Power density
#8,497
vs
#10,100
550W-DG leads by 1,603 places
Heat behaviour
#8,753
vs
#8,753
Tied - the same position in the database
Weight
#11,864
vs
#12,294
550W-DG leads by 430 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#3,247
vs
#4,039
550W-DG leads by 792 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: Aptos Solar DNA-144-BF10-550W-DG or Aptos Solar DNA-144-BF10-540W-DG?
According to our database: Aptos Solar DNA-144-BF10-550 W-DG has higher module efficiency (21.29% vs 20.90%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Aptos Solar DNA-144-BF10-550W-DG and Aptos Solar DNA-144-BF10-540W-DG?
Aptos Solar DNA-144-BF10-550 W-DG has a module efficiency of 21.29%, while Aptos Solar DNA-144-BF10-540 W-DG is 20.90%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Aptos Solar DNA-144-BF10-550W-DG use vs Aptos Solar DNA-144-BF10-540W-DG?
Aptos Solar DNA-144-BF10-550 W-DG uses PERC cells; Aptos Solar DNA-144-BF10-540 W-DG uses PERC. 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 Aptos Solar DNA-144-BF10-550W-DG and Aptos Solar DNA-144-BF10-540W-DG?
Aptos Solar DNA-144-BF10-550 W-DG has a 30 years power warranty; Aptos Solar DNA-144-BF10-540 W-DG 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 Aptos Solar DNA-144-BF10-550W-DG and Aptos Solar DNA-144-BF10-540W-DG bifacial panels?
Both Aptos Solar DNA-144-BF10-550 W-DG and Aptos Solar DNA-144-BF10-540 W-DG 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.