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505W vs 490W 15 of 18 identical Swap Change panels

DAS Solar DAS-DH120ND-505W vs DAS Solar DAS-DH120ND-490W

DAS Solar
DAS-DH120ND-505W
505 Wp 22.30 % TOPCon Bifacial
Open panel page Datasheet PDF
VS
DAS Solar
DAS-DH120ND-490W
490 Wp 21.70 % TOPCon Bifacial
Open panel page Datasheet PDF
The verdict

505W leads on the differences that matter

The largest is module efficiency: 0.60 pp more efficient. 15 of 18 comparable parameters are identical, with 1 more left out because at least one datasheet does not publish it.

See all 3 differences
How alike are they
15 of 18 comparable
parameters are identical
identical differs not published
01

What actually differs

3 of 18 parameters
Parameter 505W 490W Difference
Module efficiency 22.30 % 21.70 % 0.60 pp more efficient
Power density 223.3 Wp/m² 216.7 Wp/m² 6.6 Wp/m² higher
Rated power 505 Wp 490 Wp 15 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 (-0.280 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other.
505W
16,944 kWh
490W
16,440 kWh
Lifetime gap
504 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario 505W 490W
Standard test conditions 25 °C 100.0% of rated power 505 W 490 W
Cool, bright day 40 °C 95.8% of rated power 484 W 469 W
Typical summer roof 55 °C 91.6% of rated power 463 W 449 W
Hot roof 70 °C 87.4% of rated power 441 W 428 W
03

Full specification

Parameter 505W 490W Difference
Power and efficiency
Rated power 505 Wp 490 Wp +15 W for 505W
Module efficiency 22.30 % 21.70 % +0.60 pp for 505W
Power density 223.3 Wp/m² 216.7 Wp/m² +6.6 Wp/m² for 505W
Open-circuit voltage 43.30 V 42.71 V Effectively the same
Voltage at max power 36.13 V 35.51 V Effectively the same
Short-circuit current 14.72 A 14.54 A Effectively the same
Current at max power 13.98 A 13.80 A Effectively the same
Temperature
Temperature coefficient -0.280 %/°C -0.280 %/°C Same
Mechanical
Dimensions 1994x1134x30 mm 1994x1134x30 mm Same
Module area 2.261 m² 2.261 m² Same
Weight 27.5 kg 27.5 kg Same
Weight per kWp 54.5 kg/kWp 56.1 kg/kWp Effectively the same
Warranty and degradation
Product warranty 15 yrs 15 yrs Same
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 - - Neither datasheet publishes this
Bifacial Yes Yes Same
04

Against the whole database

14,005 panels
Efficiency
#5,100 vs #7,421
505W leads by 2,321 places
Power density
#5,028 vs #7,535
505W leads by 2,507 places
Heat behaviour
#1,309 vs #1,309
Tied - the same position in the database
Weight
#8,802 vs #10,397
505W leads by 1,595 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#6,718 vs #8,038
505W leads by 1,320 places
05

More useful comparisons

Open the full database
Same series, other bin
DAS Solar
DAS Solar DAS-DH120ND-505W vs DAS Solar DAS-DH120ND-515W
3 differences, the largest is module efficiency
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DAS Solar
DAS Solar DAS-DH120ND-505W vs DAS Solar DAS-DH120ND-510W
One difference: module efficiency
Same series, other bin
DAS Solar
DAS Solar DAS-DH120ND-505W vs DAS Solar DAS-DH120ND-500W
One difference: module efficiency
Same series, other bin
DAS Solar
DAS Solar DAS-DH120ND-505W vs DAS Solar DAS-DH120ND-495W
3 differences, the largest is module efficiency
Same series, other bin
DAS Solar
DAS Solar DAS-DH120ND-505W vs DAS Solar DAS-DH120NA-490
9 differences, the largest is temperature coefficient
Same series, other bin
DAS Solar
DAS Solar DAS-DH120ND-505W vs DAS Solar DAS-DH120NA-485
8 differences, the largest is temperature coefficient
06

Written summary

07

Questions about this pairing

Which panel is better: DAS Solar DAS-DH120ND-505W or DAS Solar DAS-DH120ND-490W?
According to our database: DAS Solar DAS-DH120ND-505 W has higher module efficiency (22.30% vs 21.70%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of DAS Solar DAS-DH120ND-505W and DAS Solar DAS-DH120ND-490W?
DAS Solar DAS-DH120ND-505 W has a module efficiency of 22.30%, while DAS Solar DAS-DH120ND-490 W is 21.70%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does DAS Solar DAS-DH120ND-505W use vs DAS Solar DAS-DH120ND-490W?
DAS Solar DAS-DH120ND-505 W uses TOPCon cells; DAS Solar DAS-DH120ND-490 W 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 DAS Solar DAS-DH120ND-505W and DAS Solar DAS-DH120ND-490W?
DAS Solar DAS-DH120ND-505 W has a 30 years power warranty; DAS Solar DAS-DH120ND-490 W 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 DAS Solar DAS-DH120ND-505W and DAS Solar DAS-DH120ND-490W bifacial panels?
Both DAS Solar DAS-DH120ND-505 W and DAS Solar DAS-DH120ND-490 W 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.