Resun Solar RS8V-M-DG-415 vs Resun Solar RS8V-M-DG-440
VS
The verdict
440 leads on the differences that matter
The largest is module efficiency: 1.28 pp more efficient. 15 of 19 comparable parameters are identical.
See all 4 differencesHow alike are they
15
of 19 comparable
parameters are identical
parameters are identical
identical
differs
01
4 of 19 parameters
What actually differs
Parameter
415
440
Difference
Module efficiency
21.25 %
22.53 %
1.28 pp more efficient
Power density
212.5 Wp/m²
225.3 Wp/m²
12.8 Wp/m² higher
Rated power
415 Wp
440 Wp
25 W more power
Weight per kWp
57.3 kg/kWp
54.1 kg/kWp
3.3 kg/kWp lighter
02
What it means on a roof
Thirty years of production
Declared annual degradation, with a 1.0% first-year loss assumed for both panels because at least one datasheet omits it, 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
13,707 kWh
440
14,533 kWh
Lifetime gap
826 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
415
440
Standard test conditions
25 °C
100.0% of rated power
415 W
440 W
Cool, bright day
40 °C
95.5% of rated power
396 W
420 W
Typical summer roof
55 °C
91.0% of rated power
378 W
400 W
Hot roof
70 °C
86.5% of rated power
359 W
381 W
03
Full specification
Parameter
415
440
Difference
Power and efficiency
Rated power
415 Wp
440 Wp
+25 W for 440
Module efficiency
21.25 %
22.53 %
+1.28 pp for 440
Power density
212.5 Wp/m²
225.3 Wp/m²
+12.8 Wp/m² for 440
Open-circuit voltage
38.15 V
38.90 V
Effectively the same
Voltage at max power
31.71 V
32.45 V
Effectively the same
Short-circuit current
13.91 A
14.36 A
Effectively the same
Current at max power
13.09 A
13.56 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
23.8 kg
23.8 kg
Same
Weight per kWp
57.3 kg/kWp
54.1 kg/kWp
-3.3 kg/kWp for 440
Warranty and degradation
Product warranty
15 yrs
15 yrs
Same
Performance warranty
30 yrs
30 yrs
Same
Annual degradation
0.50 %/yr
0.50 %/yr
Same
Technology
Cell technology
TOPCon
TOPCon
Same
Cell type
Monocrystalline
Monocrystalline
Same
Cell count
108
108
Same
Bifacial
Yes
Yes
Same
04
14,005 panels
Against the whole database
Efficiency
#8,904
vs
#3,982
440 leads by 4,922 places
Power density
#8,791
vs
#4,099
440 leads by 4,692 places
Heat behaviour
#6,093
vs
#6,093
Tied - the same position in the database
Weight
#11,184
vs
#8,316
440 leads by 2,868 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#10,535
vs
#8,801
440 leads by 1,734 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: Resun Solar RS8V-M-DG-415 or Resun Solar RS8V-M-DG-440?
According to our database: Resun Solar RS8V-M-DG-440 has higher module efficiency (22.53% vs 21.25%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Resun Solar RS8V-M-DG-415 and Resun Solar RS8V-M-DG-440?
Resun Solar RS8V-M-DG-415 has a module efficiency of 21.25%, while Resun Solar RS8V-M-DG-440 is 22.53%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Resun Solar RS8V-M-DG-415 use vs Resun Solar RS8V-M-DG-440?
Resun Solar RS8V-M-DG-415 uses TOPCon cells; Resun Solar RS8V-M-DG-440 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 Resun Solar RS8V-M-DG-415 and Resun Solar RS8V-M-DG-440?
Resun Solar RS8V-M-DG-415 has a 30 years power warranty; Resun Solar RS8V-M-DG-440 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 Resun Solar RS8V-M-DG-415 and Resun Solar RS8V-M-DG-440 bifacial panels?
Both Resun Solar RS8V-M-DG-415 and Resun Solar RS8V-M-DG-440 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.
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.