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370-COM vs 425-R 6 of 19 identical Swap Change panels

Maxeon SPR-MAX3-370-COM vs Maxeon SPR-MAX3-425-R

Maxeon
SPR-MAX3-370-COM
370 Wp 20.90 % Back Contact
Open panel page Datasheet PDF
VS
Maxeon SPR-MAX3-425-R
Maxeon
SPR-MAX3-425-R
425 Wp 22.40 % Back Contact
Open panel page Datasheet PDF
The verdict

425-R leads on the differences that matter

The largest is module efficiency: 1.50 pp more efficient. 6 of 19 comparable parameters are identical.

See all 13 differences
How alike are they
6 of 19 comparable
parameters are identical
identical differs
01

What actually differs

13 of 19 parameters
Parameter 370-COM 425-R Difference
Module efficiency 20.90 % 22.40 % 1.50 pp more efficient
Rated power 370 Wp 425 Wp 55 W more power
Power density 209.3 Wp/m² 224.2 Wp/m² 14.9 Wp/m² higher
Performance warranty 25 yrs 40 yrs 15 yrs longer
Product warranty 25 yrs 40 yrs 15 yrs longer
Open-circuit voltage 74.70 V 40.70 V 34.00 V apart
Short-circuit current 6.52 A 13.13 A 6.61 A apart
Module area 1.768 m² 1.895 m² 0.128 m² apart
Weight 19.0 kg 21.2 kg 2.2 kg lighter
Voltage at max power 61.80 V 34.90 V 26.90 V apart
Current at max power 5.99 A 12.18 A 6.19 A apart
Cell count 104 112 8 cells apart
Dimensions 1690x1046x40 mm 1812x1046x40 mm 1690x1046x40 mm vs 1812x1046x40 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.
370-COM
12,571 kWh
425-R
14,439 kWh
Lifetime gap
1,868 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario 370-COM 425-R
Standard test conditions 25 °C 100.0% of rated power 370 W 425 W
Cool, bright day 40 °C 96.0% of rated power 355 W 408 W
Typical summer roof 55 °C 91.9% of rated power 340 W 391 W
Hot roof 70 °C 87.8% of rated power 325 W 373 W
03

Full specification

Parameter 370-COM 425-R Difference
Power and efficiency
Rated power 370 Wp 425 Wp +55 W for 425-R
Module efficiency 20.90 % 22.40 % +1.50 pp for 425-R
Power density 209.3 Wp/m² 224.2 Wp/m² +14.9 Wp/m² for 425-R
Open-circuit voltage 74.70 V 40.70 V 34.00 V apart
Voltage at max power 61.80 V 34.90 V 26.90 V apart
Short-circuit current 6.52 A 13.13 A 6.61 A apart
Current at max power 5.99 A 12.18 A 6.19 A apart
Temperature
Temperature coefficient -0.270 %/°C -0.270 %/°C Same
Mechanical
Dimensions 1690x1046x40 mm 1812x1046x40 mm 1690x1046x40 mm vs 1812x1046x40 mm
Module area 1.768 m² 1.895 m² 0.128 m² apart
Weight 19.0 kg 21.2 kg -2.2 kg for 370-COM
Weight per kWp 51.4 kg/kWp 49.9 kg/kWp Effectively the same
Warranty and degradation
Product warranty 25 yrs 40 yrs +15 yrs for 425-R
Performance warranty 25 yrs 40 yrs +15 yrs for 425-R
Annual degradation 0.25 %/yr 0.25 %/yr Same
Technology
Cell technology Back Contact Back Contact Same
Cell type Monocrystalline Monocrystalline Same
Cell count 104 112 8 cells apart
Bifacial No No Same
04

Against the whole database

14,005 panels
Efficiency
#10,072 vs #4,774
425-R leads by 5,298 places
Power density
#9,991 vs #4,759
425-R leads by 5,232 places
Heat behaviour
#1,280 vs #1,280
Tied - the same position in the database
Weight
#4,718 vs #3,266
425-R leads by 1,452 places
Warranty
#9,798 vs #1
425-R leads by 9,797 places
Overall
#10,978 vs #2,122
425-R leads by 8,856 places
05

More useful comparisons

Open the full database
Same series, other bin
Maxeon
Maxeon SPR-MAX3-370-COM vs Maxeon SPR-MAX3-400-COM
7 differences, the largest is module efficiency
Same series, other bin
Maxeon
Maxeon SPR-MAX3-370-COM vs Maxeon SPR-MAX3-390-COM
7 differences, the largest is module efficiency
Same series, other bin
Maxeon
Maxeon SPR-MAX3-370-COM vs Maxeon SPR-MAX3-380-COM
6 differences, the largest is performance warranty
Same series, other bin
Maxeon
Maxeon SPR-MAX3-425-R vs Maxeon SPR-MAX3-430-R
One difference: module efficiency
Same series, other bin
Maxeon
Maxeon SPR-MAX3-425-R vs Maxeon SPR-MAX3-415-R
3 differences, the largest is module efficiency
Same series, other bin
Maxeon
Maxeon SPR-MAX3-425-R vs Maxeon SPR-MAX3-375-BLK
11 differences, the largest is module efficiency
06

Written summary

07

Questions about this pairing

Which panel is better: Maxeon SPR-MAX3-370-COM or Maxeon SPR-MAX3-425-R?
According to our database: Maxeon SPR-MAX3-425-R has higher module efficiency (22.40% vs 20.90%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Maxeon SPR-MAX3-370-COM and Maxeon SPR-MAX3-425-R?
Maxeon SPR-MAX3-370-COM has a module efficiency of 20.90%, while Maxeon SPR-MAX3-425-R is 22.40%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Maxeon SPR-MAX3-370-COM use vs Maxeon SPR-MAX3-425-R?
Maxeon SPR-MAX3-370-COM uses Back Contact cells; Maxeon SPR-MAX3-425-R 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-MAX3-370-COM and Maxeon SPR-MAX3-425-R?
Maxeon SPR-MAX3-370-COM has a 25 years power warranty; Maxeon SPR-MAX3-425-R 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.