VSUN VSUN420N-108BMH-DG-BB vs VSUN VSUN425N-108BMH-DG-BB
VS
The verdict
VSUN425N-108BMH-DG-BB leads on the differences that matter
The largest is module efficiency: 0.25 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
VSUN420N-108BMH-DG-BB
VSUN425N-108BMH-DG-BB
Difference
Module efficiency
21.51 %
21.76 %
0.25 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.
VSUN420N-108BMH-DG-BB
14,092 kWh
VSUN425N-108BMH-DG-BB
14,260 kWh
Lifetime gap
168 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
VSUN420N-108BMH-DG-BB
VSUN425N-108BMH-DG-BB
Standard test conditions
25 °C
100.0% of rated power
420 W
425 W
Cool, bright day
40 °C
95.5% of rated power
401 W
406 W
Typical summer roof
55 °C
91.0% of rated power
382 W
387 W
Hot roof
70 °C
86.5% of rated power
363 W
368 W
03
Full specification
Parameter
VSUN420N-108BMH-DG-BB
VSUN425N-108BMH-DG-BB
Difference
Power and efficiency
Rated power
420 Wp
425 Wp
Effectively the same
Module efficiency
21.51 %
21.76 %
+0.25 pp for VSUN425N-108BMH-DG-BB
Power density
215.1 Wp/m²
217.6 Wp/m²
Effectively the same
Open-circuit voltage
38.11 V
38.40 V
Effectively the same
Voltage at max power
31.52 V
31.72 V
Effectively the same
Short-circuit current
14.07 A
14.16 A
Effectively the same
Current at max power
13.32 A
13.40 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
24.7 kg
24.7 kg
Same
Weight per kWp
58.8 kg/kWp
58.1 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
#7,958
vs
#7,349
VSUN425N-108BMH-DG-BB leads by 609 places
Power density
#7,946
vs
#7,235
VSUN425N-108BMH-DG-BB leads by 711 places
Heat behaviour
#6,152
vs
#6,152
Tied - the same position in the database
Weight
#11,997
vs
#11,654
VSUN425N-108BMH-DG-BB leads by 343 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#8,723
vs
#8,246
VSUN425N-108BMH-DG-BB leads by 477 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: VSUN VSUN420N-108BMH-DG-BB or VSUN VSUN425N-108BMH-DG-BB?
According to our database: VSUN VSUN425N-108BMH-DG-BB has higher module efficiency (21.76% vs 21.51%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of VSUN VSUN420N-108BMH-DG-BB and VSUN VSUN425N-108BMH-DG-BB?
VSUN VSUN420N-108BMH-DG-BB has a module efficiency of 21.51%, while VSUN VSUN425N-108BMH-DG-BB is 21.76%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does VSUN VSUN420N-108BMH-DG-BB use vs VSUN VSUN425N-108BMH-DG-BB?
VSUN VSUN420N-108BMH-DG-BB uses TOPCon cells; VSUN VSUN425N-108BMH-DG-BB 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 VSUN VSUN420N-108BMH-DG-BB and VSUN VSUN425N-108BMH-DG-BB?
VSUN VSUN420N-108BMH-DG-BB has a 30 years power warranty; VSUN VSUN425N-108BMH-DG-BB 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 VSUN VSUN420N-108BMH-DG-BB and VSUN VSUN425N-108BMH-DG-BB bifacial panels?
Both VSUN VSUN420N-108BMH-DG-BB and VSUN VSUN425N-108BMH-DG-BB 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 1 VSUN offer
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.