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500W vs 490W 15 of 18 identical Swap Change panels

DAS Solar DAS-DH120ND-500W vs DAS Solar DAS-DH120ND-490W

DAS Solar
DAS-DH120ND-500W
500 Wp 22.10 % 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

500W leads on the differences that matter

The largest is module efficiency: 0.40 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 500W 490W Difference
Module efficiency 22.10 % 21.70 % 0.40 pp more efficient
Power density 221.1 Wp/m² 216.7 Wp/m² 4.4 Wp/m² higher
Rated power 500 Wp 490 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 (-0.280 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other.
500W
16,776 kWh
490W
16,440 kWh
Lifetime gap
336 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario 500W 490W
Standard test conditions 25 °C 100.0% of rated power 500 W 490 W
Cool, bright day 40 °C 95.8% of rated power 479 W 469 W
Typical summer roof 55 °C 91.6% of rated power 458 W 449 W
Hot roof 70 °C 87.4% of rated power 437 W 428 W
03

Full specification

Parameter 500W 490W Difference
Power and efficiency
Rated power 500 Wp 490 Wp +10 W for 500W
Module efficiency 22.10 % 21.70 % +0.40 pp for 500W
Power density 221.1 Wp/m² 216.7 Wp/m² +4.4 Wp/m² for 500W
Open-circuit voltage 43.10 V 42.71 V Effectively the same
Voltage at max power 35.92 V 35.51 V Effectively the same
Short-circuit current 14.66 A 14.54 A Effectively the same
Current at max power 13.92 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 55.0 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
#6,012 vs #7,421
500W leads by 1,409 places
Power density
#5,969 vs #7,535
500W leads by 1,566 places
Heat behaviour
#1,309 vs #1,309
Tied - the same position in the database
Weight
#9,361 vs #10,397
500W leads by 1,036 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#7,139 vs #8,038
500W leads by 899 places
05

More useful comparisons

Open the full database
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DAS Solar DAS-DH120ND-500W vs DAS Solar DAS-DH120ND-510W
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DAS Solar DAS-DH120ND-500W vs DAS Solar DAS-DH120ND-505W
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DAS Solar DAS-DH120ND-500W vs DAS Solar DAS-DH120ND-495W
One difference: module efficiency
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DAS Solar DAS-DH120ND-500W vs DAS Solar DAS-DH120NA-490
10 differences, the largest is module efficiency
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DAS Solar DAS-DH120ND-500W vs DAS Solar DAS-DH120NA-485
9 differences, the largest is temperature coefficient
06

Written summary

07

Questions about this pairing

Which panel is better: DAS Solar DAS-DH120ND-500W or DAS Solar DAS-DH120ND-490W?
According to our database: DAS Solar DAS-DH120ND-500 W has higher module efficiency (22.10% 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-500W and DAS Solar DAS-DH120ND-490W?
DAS Solar DAS-DH120ND-500 W has a module efficiency of 22.10%, 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-500W use vs DAS Solar DAS-DH120ND-490W?
DAS Solar DAS-DH120ND-500 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-500W and DAS Solar DAS-DH120ND-490W?
DAS Solar DAS-DH120ND-500 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-500W and DAS Solar DAS-DH120ND-490W bifacial panels?
Both DAS Solar DAS-DH120ND-500 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.