JA Solar JAM72S42-625/LR vs JA Solar JAM72S42-635/LR
VS
The verdict
635/LR leads on the differences that matter
The largest is module efficiency: 0.30 pp more efficient. 16 of 19 comparable parameters are identical.
See all 3 differencesHow alike are they
16
of 19 comparable
parameters are identical
parameters are identical
identical
differs
01
3 of 19 parameters
What actually differs
Parameter
625/LR
635/LR
Difference
Module efficiency
22.40 %
22.70 %
0.30 pp more efficient
Power density
223.6 Wp/m²
227.2 Wp/m²
3.6 Wp/m² higher
Rated power
625 Wp
635 Wp
10 W more power
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 (-0.290 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other.
625/LR
20,970 kWh
635/LR
21,306 kWh
Lifetime gap
336 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
625/LR
635/LR
Standard test conditions
25 °C
100.0% of rated power
625 W
635 W
Cool, bright day
40 °C
95.7% of rated power
598 W
607 W
Typical summer roof
55 °C
91.3% of rated power
571 W
580 W
Hot roof
70 °C
87.0% of rated power
543 W
552 W
03
Full specification
Parameter
625/LR
635/LR
Difference
Power and efficiency
Rated power
625 Wp
635 Wp
+10 W for 635/LR
Module efficiency
22.40 %
22.70 %
+0.30 pp for 635/LR
Power density
223.6 Wp/m²
227.2 Wp/m²
+3.6 Wp/m² for 635/LR
Open-circuit voltage
52.27 V
52.67 V
Effectively the same
Voltage at max power
43.71 V
44.10 V
Effectively the same
Short-circuit current
15.16 A
15.26 A
Effectively the same
Current at max power
14.30 A
14.40 A
Effectively the same
Temperature
Temperature coefficient
-0.290 %/°C
-0.290 %/°C
Same
Mechanical
Dimensions
2465x1134x30 mm
2465x1134x30 mm
Same
Module area
2.795 m²
2.795 m²
Same
Weight
29.6 kg
29.6 kg
Same
Weight per kWp
47.4 kg/kWp
46.6 kg/kWp
Effectively the same
Warranty and degradation
Product warranty
12 yrs
12 yrs
Same
Performance warranty
25 yrs
25 yrs
Same
Annual degradation
0.40 %/yr
0.40 %/yr
Same
Technology
Cell technology
TOPCon
TOPCon
Same
Cell type
Monocrystalline
Monocrystalline
Same
Cell count
144
144
Same
Bifacial
No
No
Same
04
14,005 panels
Against the whole database
Efficiency
#4,774
vs
#3,307
635/LR leads by 1,467 places
Power density
#4,955
vs
#3,252
635/LR leads by 1,703 places
Heat behaviour
#2,165
vs
#2,165
Tied - the same position in the database
Weight
#1,649
vs
#1,257
635/LR leads by 392 places
Warranty
#9,798
vs
#9,798
Tied - the same position in the database
Overall
#3,995
vs
#3,258
635/LR leads by 737 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: JA Solar JAM72S42-625/LR or JA Solar JAM72S42-635/LR?
According to our database: JA Solar JAM72S42-635/LR has higher module efficiency (22.70% vs 22.40%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of JA Solar JAM72S42-625/LR and JA Solar JAM72S42-635/LR?
JA Solar JAM72S42-625/LR has a module efficiency of 22.40%, while JA Solar JAM72S42-635/LR is 22.70%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does JA Solar JAM72S42-625/LR use vs JA Solar JAM72S42-635/LR?
JA Solar JAM72S42-625/LR uses TOPCon cells; JA Solar JAM72S42-635/LR 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 JA Solar JAM72S42-625/LR and JA Solar JAM72S42-635/LR?
JA Solar JAM72S42-625/LR has a 25 years power warranty; JA Solar JAM72S42-635/LR has a 25 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 391 JA Solar 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.