Maxeon SPR-MAX3-415-R vs Maxeon SPR-MAX3-390-COM
VS
The verdict
390-COM leads on the differences that matter
The largest is rated power: 25 W more power. 8 of 19 comparable parameters are identical.
See all 11 differencesHow alike are they
8
of 19 comparable
parameters are identical
parameters are identical
identical
differs
01
11 of 19 parameters
What actually differs
Parameter
415-R
390-COM
Difference
Rated power
415 Wp
390 Wp
25 W more power
Open-circuit voltage
40.60 V
75.30 V
34.70 V apart
Short-circuit current
13.10 A
6.55 A
6.55 A apart
Module area
1.895 m²
1.768 m²
0.128 m² apart
Weight
21.2 kg
19.0 kg
2.2 kg lighter
Module efficiency
21.90 %
22.10 %
0.20 pp more efficient
Voltage at max power
34.50 V
64.50 V
30.00 V apart
Current at max power
12.03 A
6.05 A
5.98 A apart
Cell count
112
104
8 cells apart
Weight per kWp
51.1 kg/kWp
48.7 kg/kWp
2.4 kg/kWp lighter
Dimensions
1812x1046x40 mm
1690x1046x40 mm
1812x1046x40 mm vs 1690x1046x40 mm
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 (-0.270 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other.
415-R
14,100 kWh
390-COM
13,250 kWh
Lifetime gap
850 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
415-R
390-COM
Standard test conditions
25 °C
100.0% of rated power
415 W
390 W
Cool, bright day
40 °C
96.0% of rated power
398 W
374 W
Typical summer roof
55 °C
91.9% of rated power
381 W
358 W
Hot roof
70 °C
87.8% of rated power
365 W
343 W
03
Full specification
Parameter
415-R
390-COM
Difference
Power and efficiency
Rated power
415 Wp
390 Wp
+25 W for 415-R
Module efficiency
21.90 %
22.10 %
+0.20 pp for 390-COM
Power density
219.0 Wp/m²
220.6 Wp/m²
Effectively the same
Open-circuit voltage
40.60 V
75.30 V
34.70 V apart
Voltage at max power
34.50 V
64.50 V
30.00 V apart
Short-circuit current
13.10 A
6.55 A
6.55 A apart
Current at max power
12.03 A
6.05 A
5.98 A apart
Temperature
Temperature coefficient
-0.270 %/°C
-0.270 %/°C
Same
Mechanical
Dimensions
1812x1046x40 mm
1690x1046x40 mm
1812x1046x40 mm vs 1690x1046x40 mm
Module area
1.895 m²
1.768 m²
0.128 m² apart
Weight
21.2 kg
19.0 kg
-2.2 kg for 390-COM
Weight per kWp
51.1 kg/kWp
48.7 kg/kWp
-2.4 kg/kWp for 390-COM
Warranty and degradation
Product warranty
40 yrs
40 yrs
Same
Performance warranty
40 yrs
40 yrs
Same
Annual degradation
0.25 %/yr
0.25 %/yr
Same
Technology
Cell technology
Back Contact
Back Contact
Same
Cell type
Monocrystalline
Monocrystalline
Same
Cell count
112
104
8 cells apart
Bifacial
No
No
Same
04
14,005 panels
Against the whole database
Efficiency
#6,783
vs
#6,012
390-COM leads by 771 places
Power density
#6,789
vs
#6,156
390-COM leads by 633 places
Heat behaviour
#1,280
vs
#1,280
Tied - the same position in the database
Weight
#4,418
vs
#2,430
390-COM leads by 1,988 places
Warranty
#1
vs
#1
Tied - the same position in the database
Overall
#2,872
vs
#3,453
415-R leads by 581 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: Maxeon SPR-MAX3-415-R or Maxeon SPR-MAX3-390-COM?
According to our database: Maxeon SPR-MAX3-390-COM has higher module efficiency (22.10% vs 21.90%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Maxeon SPR-MAX3-415-R and Maxeon SPR-MAX3-390-COM?
Maxeon SPR-MAX3-415-R has a module efficiency of 21.90%, while Maxeon SPR-MAX3-390-COM is 22.10%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Maxeon SPR-MAX3-415-R use vs Maxeon SPR-MAX3-390-COM?
Maxeon SPR-MAX3-415-R uses Back Contact cells; Maxeon SPR-MAX3-390-COM uses Back Contact. 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 Maxeon SPR-MAX3-415-R and Maxeon SPR-MAX3-390-COM?
Maxeon SPR-MAX3-415-R has a 40 years power warranty; Maxeon SPR-MAX3-390-COM has a 40 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.
Shop prices: See 26 Maxeon 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.