Maxeon SPR-MAX3-425-R vs Maxeon SPR-MAX3-375-BLK
VS
The verdict
425-R leads on the differences that matter
The largest is module efficiency: 1.20 pp more efficient. 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
425-R
375-BLK
Difference
Module efficiency
22.40 %
21.20 %
1.20 pp more efficient
Rated power
425 Wp
375 Wp
50 W more power
Power density
224.2 Wp/m²
212.1 Wp/m²
12.1 Wp/m² higher
Open-circuit voltage
40.70 V
75.50 V
34.80 V apart
Short-circuit current
13.13 A
6.30 A
6.83 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
Voltage at max power
34.90 V
64.00 V
29.10 V apart
Current at max power
12.18 A
5.86 A
6.32 A apart
Cell count
112
104
8 cells apart
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.
425-R
14,439 kWh
375-BLK
12,741 kWh
Lifetime gap
1,698 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
425-R
375-BLK
Standard test conditions
25 °C
100.0% of rated power
425 W
375 W
Cool, bright day
40 °C
96.0% of rated power
408 W
360 W
Typical summer roof
55 °C
91.9% of rated power
391 W
345 W
Hot roof
70 °C
87.8% of rated power
373 W
329 W
03
Full specification
Parameter
425-R
375-BLK
Difference
Power and efficiency
Rated power
425 Wp
375 Wp
+50 W for 425-R
Module efficiency
22.40 %
21.20 %
+1.20 pp for 425-R
Power density
224.2 Wp/m²
212.1 Wp/m²
+12.1 Wp/m² for 425-R
Open-circuit voltage
40.70 V
75.50 V
34.80 V apart
Voltage at max power
34.90 V
64.00 V
29.10 V apart
Short-circuit current
13.13 A
6.30 A
6.83 A apart
Current at max power
12.18 A
5.86 A
6.32 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 375-BLK
Weight per kWp
49.9 kg/kWp
50.7 kg/kWp
Effectively the same
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
#4,774
vs
#9,076
425-R leads by 4,302 places
Power density
#4,759
vs
#9,087
425-R leads by 4,328 places
Heat behaviour
#1,280
vs
#1,280
Tied - the same position in the database
Weight
#3,266
vs
#4,094
425-R leads by 828 places
Warranty
#1
vs
#1
Tied - the same position in the database
Overall
#2,122
vs
#5,002
425-R leads by 2,880 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-MAX3-425-R or Maxeon SPR-MAX3-375-BLK?
According to our database: Maxeon SPR-MAX3-425-R has higher module efficiency (22.40% vs 21.20%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Maxeon SPR-MAX3-425-R and Maxeon SPR-MAX3-375-BLK?
Maxeon SPR-MAX3-425-R has a module efficiency of 22.40%, while Maxeon SPR-MAX3-375-BLK is 21.20%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Maxeon SPR-MAX3-425-R use vs Maxeon SPR-MAX3-375-BLK?
Maxeon SPR-MAX3-425-R uses Back Contact cells; Maxeon SPR-MAX3-375-BLK 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-MAX3-425-R and Maxeon SPR-MAX3-375-BLK?
Maxeon SPR-MAX3-425-R has a 40 years power warranty; Maxeon SPR-MAX3-375-BLK 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.