JA Solar JAM66D45-625/LB vs JA Solar JAM60D41-510/LB
VS
The verdict
9 differences, and they point both ways
The largest is rated power: 115 W more power. 10 of 19 comparable parameters are identical.
See all 9 differencesHow alike are they
10
of 19 comparable
parameters are identical
parameters are identical
identical
differs
01
9 of 19 parameters
What actually differs
Parameter
JAM66D45-625/LB
JAM60D41-510/LB
Difference
Rated power
625 Wp
510 Wp
115 W more power
Weight
33.1 kg
27.3 kg
5.8 kg lighter
Open-circuit voltage
48.70 V
44.25 V
4.45 V apart
Module area
2.701 m²
2.215 m²
0.486 m² apart
Short-circuit current
16.15 A
14.54 A
1.61 A apart
Cell count
132
120
12 cells apart
Current at max power
15.45 A
13.67 A
1.78 A apart
Voltage at max power
40.45 V
37.31 V
3.14 V apart
Dimensions
2382x1134x30 mm
1953x1134x30 mm
2382x1134x30 mm vs 1953x1134x30 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 (-0.290 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other.
JAM66D45-625/LB
20,970 kWh
JAM60D41-510/LB
17,112 kWh
Lifetime gap
3,858 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
JAM66D45-625/LB
JAM60D41-510/LB
Standard test conditions
25 °C
100.0% of rated power
625 W
510 W
Cool, bright day
40 °C
95.7% of rated power
598 W
488 W
Typical summer roof
55 °C
91.3% of rated power
571 W
466 W
Hot roof
70 °C
87.0% of rated power
543 W
443 W
03
Full specification
Parameter
JAM66D45-625/LB
JAM60D41-510/LB
Difference
Power and efficiency
Rated power
625 Wp
510 Wp
+115 W for JAM66D45-625/LB
Module efficiency
23.10 %
23.00 %
Effectively the same
Power density
231.4 Wp/m²
230.3 Wp/m²
Effectively the same
Open-circuit voltage
48.70 V
44.25 V
4.45 V apart
Voltage at max power
40.45 V
37.31 V
3.14 V apart
Short-circuit current
16.15 A
14.54 A
1.61 A apart
Current at max power
15.45 A
13.67 A
1.78 A apart
Temperature
Temperature coefficient
-0.290 %/°C
-0.290 %/°C
Same
Mechanical
Dimensions
2382x1134x30 mm
1953x1134x30 mm
2382x1134x30 mm vs 1953x1134x30 mm
Module area
2.701 m²
2.215 m²
0.486 m² apart
Weight
33.1 kg
27.3 kg
-5.8 kg for JAM60D41-510/LB
Weight per kWp
53.0 kg/kWp
53.5 kg/kWp
Effectively the same
Warranty and degradation
Product warranty
12 yrs
12 yrs
Same
Performance warranty
30 yrs
30 yrs
Same
Annual degradation
0.40 %/yr
0.40 %/yr
Same
Technology
Cell technology
TOPCon
TOPCon
Same
Cell type
Monocrystalline
Monocrystalline
Same
Cell count
132
120
12 cells apart
Bifacial
Yes
Yes
Same
04
14,005 panels
Against the whole database
Efficiency
#1,570
vs
#1,919
JAM66D45-625/LB leads by 349 places
Power density
#1,513
vs
#1,849
JAM66D45-625/LB leads by 336 places
Heat behaviour
#2,165
vs
#2,165
Tied - the same position in the database
Weight
#6,680
vs
#7,509
JAM66D45-625/LB leads by 829 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#2,270
vs
#6,280
JAM66D45-625/LB leads by 4,010 places
05
Open the full database
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06
Written summary
Checking cache...
07
Questions about this pairing
Which panel is better: JA Solar JAM66D45-625/LB or JA Solar JAM60D41-510/LB?
According to our database: JA Solar JAM66D45-625/LB has higher module efficiency (23.10% vs 23.00%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of JA Solar JAM66D45-625/LB and JA Solar JAM60D41-510/LB?
JA Solar JAM66D45-625/LB has a module efficiency of 23.10%, while JA Solar JAM60D41-510/LB is 23.00%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does JA Solar JAM66D45-625/LB use vs JA Solar JAM60D41-510/LB?
JA Solar JAM66D45-625/LB uses TOPCon cells; JA Solar JAM60D41-510/LB 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 JAM66D45-625/LB and JA Solar JAM60D41-510/LB?
JA Solar JAM66D45-625/LB has a 30 years power warranty; JA Solar JAM60D41-510/LB 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 JA Solar JAM66D45-625/LB and JA Solar JAM60D41-510/LB bifacial panels?
Both JA Solar JAM66D45-625/LB and JA Solar JAM60D41-510/LB 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.
Shop prices: See 394 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.