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DH120NA-490 vs DH120ND-505W 9 of 18 identical Swap Change panels

DAS Solar DAS-DH120NA-490 vs DAS Solar DAS-DH120ND-505W

DAS Solar
DAS-DH120NA-490
490 Wp 22.70 % TOPCon Bifacial
Open panel page Datasheet PDF
VS
DAS Solar
DAS-DH120ND-505W
505 Wp 22.30 % TOPCon Bifacial
Open panel page Datasheet PDF
The verdict

9 differences, and they point both ways

The largest is temperature coefficient: 0.020 %/°C better in heat. 9 of 18 comparable parameters are identical, with 1 more left out because at least one datasheet does not publish it.

See all 9 differences
How alike are they
9 of 18 comparable
parameters are identical
identical differs not published
01

What actually differs

9 of 18 parameters
Parameter DH120NA-490 DH120ND-505W Difference
Temperature coefficient -0.300 %/°C -0.280 %/°C 0.020 %/°C better in heat
Module efficiency 22.70 % 22.30 % 0.40 pp more efficient
Module area 2.158 m² 2.261 m² 0.103 m² apart
Rated power 490 Wp 505 Wp 15 W more power
Power density 227.1 Wp/m² 223.3 Wp/m² 3.7 Wp/m² higher
Weight 26.0 kg 27.5 kg 1.5 kg lighter
Short-circuit current 14.01 A 14.72 A 0.71 A apart
Dimensions 1903x1134x30 mm 1994x1134x30 mm 1903x1134x30 mm vs 1994x1134x30 mm
Current at max power 13.23 A 13.98 A 0.75 A apart
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
DH120NA-490
16,440 kWh
DH120ND-505W
16,944 kWh
Lifetime gap
504 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario DH120NA-490 DH120ND-505W
Standard test conditions 25 °C 100.0% of rated power 490 W 505 W
Cool, bright day 40 °C 95.5% of rated power 468 W 484 W
Typical summer roof 55 °C 91.0% of rated power 446 W 463 W
Hot roof 70 °C 86.5% of rated power 424 W 441 W
03

Full specification

Parameter DH120NA-490 DH120ND-505W Difference
Power and efficiency
Rated power 490 Wp 505 Wp +15 W for DH120ND-505W
Module efficiency 22.70 % 22.30 % +0.40 pp for DH120NA-490
Power density 227.1 Wp/m² 223.3 Wp/m² +3.7 Wp/m² for DH120NA-490
Open-circuit voltage 43.39 V 43.30 V Effectively the same
Voltage at max power 37.04 V 36.13 V Effectively the same
Short-circuit current 14.01 A 14.72 A 0.71 A apart
Current at max power 13.23 A 13.98 A 0.75 A apart
Temperature
Temperature coefficient -0.300 %/°C -0.280 %/°C +0.020 %/°C for DH120ND-505W
Mechanical
Dimensions 1903x1134x30 mm 1994x1134x30 mm 1903x1134x30 mm vs 1994x1134x30 mm
Module area 2.158 m² 2.261 m² 0.103 m² apart
Weight 26.0 kg 27.5 kg -1.5 kg for DH120NA-490
Weight per kWp 53.1 kg/kWp 54.5 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 120 - Not published by DAS Solar
Bifacial Yes Yes Same
04

Against the whole database

14,005 panels
Efficiency
#3,307 vs #5,100
DH120NA-490 leads by 1,793 places
Power density
#3,339 vs #5,028
DH120NA-490 leads by 1,689 places
Heat behaviour
#6,093 vs #1,309
DH120ND-505W leads by 4,784 places
Weight
#6,818 vs #8,802
DH120NA-490 leads by 1,984 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#6,727 vs #6,718
DH120ND-505W leads by 9 places
05

More useful comparisons

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

Written summary

07

Questions about this pairing

Which panel is better: DAS Solar DAS-DH120NA-490 or DAS Solar DAS-DH120ND-505W?
According to our database: DAS Solar DAS-DH120NA-490 has higher module efficiency (22.70% vs 22.30%); DAS Solar DAS-DH120ND-505 W tolerates heat better (temp coeff -0.280%/°C vs -0.300%/°C). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of DAS Solar DAS-DH120NA-490 and DAS Solar DAS-DH120ND-505W?
DAS Solar DAS-DH120NA-490 has a module efficiency of 22.70%, while DAS Solar DAS-DH120ND-505 W is 22.30%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does DAS Solar DAS-DH120NA-490 use vs DAS Solar DAS-DH120ND-505W?
DAS Solar DAS-DH120NA-490 uses TOPCon cells; DAS Solar DAS-DH120ND-505 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-DH120NA-490 and DAS Solar DAS-DH120ND-505W?
DAS Solar DAS-DH120NA-490 has a 30 years power warranty; DAS Solar DAS-DH120ND-505 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-DH120NA-490 and DAS Solar DAS-DH120ND-505W bifacial panels?
Both DAS Solar DAS-DH120NA-490 and DAS Solar DAS-DH120ND-505 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.