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420 vs 415 18 of 19 identical Swap Change panels

Jolywood JW-HD108N-420 vs Jolywood JW-HD108N-415

Jolywood JW-HD108N-420
Jolywood
JW-HD108N-420
420 Wp 21.51 % TOPCon Bifacial
Open panel page Datasheet PDF
VS
Jolywood JW-HD108N-415
Jolywood
JW-HD108N-415
415 Wp 21.25 % TOPCon Bifacial
Open panel page Datasheet PDF
The verdict

420 leads on the differences that matter

The largest is module efficiency: 0.26 pp more efficient. 18 of 19 comparable parameters are identical.

See the one difference
How alike are they
18 of 19 comparable
parameters are identical
identical differs
01

What actually differs

1 of 19 parameters
Parameter 420 415 Difference
Module efficiency 21.51 % 21.25 % 0.26 pp more efficient
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 (-0.300 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other.
420
14,092 kWh
415
13,924 kWh
Lifetime gap
168 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario 420 415
Standard test conditions 25 °C 100.0% of rated power 420 W 415 W
Cool, bright day 40 °C 95.5% of rated power 401 W 396 W
Typical summer roof 55 °C 91.0% of rated power 382 W 378 W
Hot roof 70 °C 86.5% of rated power 363 W 359 W
03

Full specification

Parameter 420 415 Difference
Power and efficiency
Rated power 420 Wp 415 Wp Effectively the same
Module efficiency 21.51 % 21.25 % +0.26 pp for 420
Power density 215.1 Wp/m² 212.5 Wp/m² Effectively the same
Open-circuit voltage 37.90 V 37.70 V Effectively the same
Voltage at max power 31.90 V 31.70 V Effectively the same
Short-circuit current 13.98 A 13.91 A Effectively the same
Current at max power 13.17 A 13.10 A Effectively the same
Temperature
Temperature coefficient -0.300 %/°C -0.300 %/°C Same
Mechanical
Dimensions 1722x1134x30 mm 1722x1134x30 mm Same
Module area 1.953 m² 1.953 m² Same
Weight 24.5 kg 24.5 kg Same
Weight per kWp 58.3 kg/kWp 59.0 kg/kWp Effectively the same
Warranty and degradation
Product warranty 25 yrs 25 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 108 108 Same
Bifacial Yes Yes Same
04

Against the whole database

14,129 panels
Efficiency
#7,958 vs #8,973
420 leads by 1,015 places
Power density
#7,946 vs #8,858
420 leads by 912 places
Heat behaviour
#6,152 vs #6,152
Tied - the same position in the database
Weight
#11,757 vs #12,081
420 leads by 324 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#8,714 vs #9,171
420 leads by 457 places
05

More useful comparisons

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Jolywood JW-HD108N-420 vs Jolywood JW-HD108N-430
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Jolywood JW-HD108N-420 vs Jolywood JW-HD108N-425
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Jolywood JW-HD108N-420 vs Jolywood JW-HD132N-715W
14 differences, the largest is module efficiency
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Jolywood JW-HD108N-420 vs Jolywood JW-HD132N-715
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06

Written summary

07

Questions about this pairing

Which panel is better: Jolywood JW-HD108N-420 or Jolywood JW-HD108N-415?
According to our database: Jolywood JW-HD108N-420 has higher module efficiency (21.51% vs 21.25%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Jolywood JW-HD108N-420 and Jolywood JW-HD108N-415?
Jolywood JW-HD108N-420 has a module efficiency of 21.51%, while Jolywood JW-HD108N-415 is 21.25%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Jolywood JW-HD108N-420 use vs Jolywood JW-HD108N-415?
Jolywood JW-HD108N-420 uses TOPCon cells; Jolywood JW-HD108N-415 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 Jolywood JW-HD108N-420 and Jolywood JW-HD108N-415?
Jolywood JW-HD108N-420 has a 30 years power warranty; Jolywood JW-HD108N-415 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 Jolywood JW-HD108N-420 and Jolywood JW-HD108N-415 bifacial panels?
Both Jolywood JW-HD108N-420 and Jolywood JW-HD108N-415 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 24 Jolywood 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.