Jolywood JW-HD108N-415 vs Jolywood JW-HD108N-420
VS
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 differenceHow alike are they
18
of 19 comparable
parameters are identical
parameters are identical
identical
differs
01
1 of 19 parameters
What actually differs
Parameter
415
420
Difference
Module efficiency
21.25 %
21.51 %
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.
415
13,924 kWh
420
14,092 kWh
Lifetime gap
168 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
415
420
Standard test conditions
25 °C
100.0% of rated power
415 W
420 W
Cool, bright day
40 °C
95.5% of rated power
396 W
401 W
Typical summer roof
55 °C
91.0% of rated power
378 W
382 W
Hot roof
70 °C
86.5% of rated power
359 W
363 W
03
Full specification
Parameter
415
420
Difference
Power and efficiency
Rated power
415 Wp
420 Wp
Effectively the same
Module efficiency
21.25 %
21.51 %
+0.26 pp for 420
Power density
212.5 Wp/m²
215.1 Wp/m²
Effectively the same
Open-circuit voltage
37.70 V
37.90 V
Effectively the same
Voltage at max power
31.70 V
31.90 V
Effectively the same
Short-circuit current
13.91 A
13.98 A
Effectively the same
Current at max power
13.10 A
13.17 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
59.0 kg/kWp
58.3 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
14,129 panels
Against the whole database
Efficiency
#8,973
vs
#7,958
420 leads by 1,015 places
Power density
#8,858
vs
#7,946
420 leads by 912 places
Heat behaviour
#6,152
vs
#6,152
Tied - the same position in the database
Weight
#12,081
vs
#11,757
420 leads by 324 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#9,171
vs
#8,714
420 leads by 457 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: Jolywood JW-HD108N-415 or Jolywood JW-HD108N-420?
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-415 and Jolywood JW-HD108N-420?
Jolywood JW-HD108N-415 has a module efficiency of 21.25%, while Jolywood JW-HD108N-420 is 21.51%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Jolywood JW-HD108N-415 use vs Jolywood JW-HD108N-420?
Jolywood JW-HD108N-415 uses TOPCon cells; Jolywood JW-HD108N-420 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-415 and Jolywood JW-HD108N-420?
Jolywood JW-HD108N-415 has a 30 years power warranty; Jolywood JW-HD108N-420 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-415 and Jolywood JW-HD108N-420 bifacial panels?
Both Jolywood JW-HD108N-415 and Jolywood JW-HD108N-420 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.