JA Solar JAM54D40-475/LR vs JA Solar JAM54D40-470/LR
VS
The verdict
475/LR leads on the differences that matter
The largest is module efficiency: 0.30 pp more efficient. 18 of 19 comparable parameters are identical.
See the one differenceHow alike are they
18
of 19 comparable
parameters are identical
parameters are identical
identical
differs
01
1 of 19 parameters
What actually differs
Parameter
475/LR
470/LR
Difference
Module efficiency
23.80 %
23.50 %
0.30 pp more efficient
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.
475/LR
15,937 kWh
470/LR
15,769 kWh
Lifetime gap
168 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
475/LR
470/LR
Standard test conditions
25 °C
100.0% of rated power
475 W
470 W
Cool, bright day
40 °C
95.7% of rated power
454 W
450 W
Typical summer roof
55 °C
91.3% of rated power
434 W
429 W
Hot roof
70 °C
87.0% of rated power
413 W
409 W
03
Full specification
Parameter
475/LR
470/LR
Difference
Power and efficiency
Rated power
475 Wp
470 Wp
Effectively the same
Module efficiency
23.80 %
23.50 %
+0.30 pp for 475/LR
Power density
237.7 Wp/m²
235.2 Wp/m²
Effectively the same
Open-circuit voltage
40.55 V
40.40 V
Effectively the same
Voltage at max power
34.18 V
33.84 V
Effectively the same
Short-circuit current
14.67 A
14.66 A
Effectively the same
Current at max power
13.90 A
13.89 A
Effectively the same
Temperature
Temperature coefficient
-0.290 %/°C
-0.290 %/°C
Same
Mechanical
Dimensions
1762x1134x30 mm
1762x1134x30 mm
Same
Module area
1.998 m²
1.998 m²
Same
Weight
22.0 kg
22.0 kg
Same
Weight per kWp
46.3 kg/kWp
46.8 kg/kWp
Effectively the same
Warranty and degradation
Product warranty
15 yrs
15 yrs
Same
Performance warranty
30 yrs
30 yrs
Same
Annual degradation
0.40 %/yr
0.40 %/yr
Same
Technology
Cell technology
N-type
N-type
Same
Cell type
Monocrystalline
Monocrystalline
Same
Cell count
108
108
Same
Bifacial
No
No
Same
04
14,005 panels
Against the whole database
Efficiency
#433
vs
#716
475/LR leads by 283 places
Power density
#467
vs
#674
475/LR leads by 207 places
Heat behaviour
#2,165
vs
#2,165
Tied - the same position in the database
Weight
#1,117
vs
#1,356
475/LR leads by 239 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#5,786
vs
#6,332
475/LR leads by 546 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 JAM54D40-475/LR or JA Solar JAM54D40-470/LR?
According to our database: JA Solar JAM54D40-475/LR has higher module efficiency (23.80% vs 23.50%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of JA Solar JAM54D40-475/LR and JA Solar JAM54D40-470/LR?
JA Solar JAM54D40-475/LR has a module efficiency of 23.80%, while JA Solar JAM54D40-470/LR is 23.50%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does JA Solar JAM54D40-475/LR use vs JA Solar JAM54D40-470/LR?
JA Solar JAM54D40-475/LR uses N-type cells; JA Solar JAM54D40-470/LR uses N-type. 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 JAM54D40-475/LR and JA Solar JAM54D40-470/LR?
JA Solar JAM54D40-475/LR has a 30 years power warranty; JA Solar JAM54D40-470/LR 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.
Shop prices: See 389 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.