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550/GB/1500V vs 580/LB/1500V 11 of 19 identical Swap Change panels

JA Solar JAM72D30-550/GB/1500V vs JA Solar JAM72D30-580/LB/1500V

JAM72D30-550/GB/1500V
550 Wp 21.30 % PERC Bifacial
Open panel page Datasheet PDF
VS
JAM72D30-580/LB/1500V
580 Wp 21.90 % PERC Bifacial
Open panel page Datasheet PDF
The verdict

580/LB/1500V leads on the differences that matter

The largest is module efficiency: 0.60 pp more efficient. 11 of 19 comparable parameters are identical.

See all 8 differences
How alike are they
11 of 19 comparable
parameters are identical
identical differs
01

What actually differs

8 of 19 parameters
Parameter 550/GB/1500V 580/LB/1500V Difference
Module efficiency 21.30 % 21.90 % 0.60 pp more efficient
Rated power 550 Wp 580 Wp 30 W more power
Power density 212.9 Wp/m² 219.2 Wp/m² 6.3 Wp/m² higher
Module area 2.583 m² 2.646 m² 0.062 m² apart
Open-circuit voltage 49.90 V 51.04 V 1.14 V apart
Short-circuit current 14.00 A 14.50 A 0.50 A apart
Dimensions 2278x1134x30 mm 2333x1134x30 mm 2278x1134x30 mm vs 2333x1134x30 mm
Current at max power 13.11 A 13.73 A 0.62 A apart
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 (-0.350 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other.
550/GB/1500V
18,112 kWh
580/LB/1500V
19,100 kWh
Lifetime gap
988 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario 550/GB/1500V 580/LB/1500V
Standard test conditions 25 °C 100.0% of rated power 550 W 580 W
Cool, bright day 40 °C 94.8% of rated power 521 W 550 W
Typical summer roof 55 °C 89.5% of rated power 492 W 519 W
Hot roof 70 °C 84.2% of rated power 463 W 489 W
03

Full specification

Parameter 550/GB/1500V 580/LB/1500V Difference
Power and efficiency
Rated power 550 Wp 580 Wp +30 W for 580/LB/1500V
Module efficiency 21.30 % 21.90 % +0.60 pp for 580/LB/1500V
Power density 212.9 Wp/m² 219.2 Wp/m² +6.3 Wp/m² for 580/LB/1500V
Open-circuit voltage 49.90 V 51.04 V 1.14 V apart
Voltage at max power 41.96 V 42.24 V Effectively the same
Short-circuit current 14.00 A 14.50 A 0.50 A apart
Current at max power 13.11 A 13.73 A 0.62 A apart
Temperature
Temperature coefficient -0.350 %/°C -0.350 %/°C Same
Mechanical
Dimensions 2278x1134x30 mm 2333x1134x30 mm 2278x1134x30 mm vs 2333x1134x30 mm
Module area 2.583 m² 2.646 m² 0.062 m² apart
Weight 31.8 kg 32.5 kg Effectively the same
Weight per kWp 57.8 kg/kWp 56.0 kg/kWp Effectively the same
Warranty and degradation
Product warranty 12 yrs 12 yrs Same
Performance warranty 30 yrs 30 yrs Same
Annual degradation 0.45 %/yr 0.45 %/yr Same
Technology
Cell technology PERC PERC Same
Cell type Monocrystalline Monocrystalline Same
Cell count 144 144 Same
Bifacial Yes Yes Same
04

Against the whole database

14,129 panels
Efficiency
#8,585 vs #6,847
580/LB/1500V leads by 1,738 places
Power density
#8,563 vs #6,797
580/LB/1500V leads by 1,766 places
Heat behaviour
#10,489 vs #10,489
Tied - the same position in the database
Weight
#11,526 vs #10,427
580/LB/1500V leads by 1,099 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#7,043 vs #5,238
580/LB/1500V leads by 1,805 places
05

More useful comparisons

Open the full database
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JA Solar JAM72D30-550/GB/1500V vs JA Solar JAM66D45-630/LB
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JA Solar JAM72D30-550/GB/1500V vs JA Solar JAM66D45-625/LB
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JA Solar JAM72D30-550/GB/1500V vs JA Solar JAM66D45-620/LB
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JA Solar JAM72D30-550/GB/1500V vs JA Solar JAM66D45-615/LB
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JA Solar JAM72D30-550/GB/1500V vs JA Solar JAM66D45-610/LB
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Same series, other bin
JA Solar JAM72D30-550/GB/1500V vs JA Solar JAM66D45-605/LB
15 differences, the largest is module efficiency
06

Written summary

07

Questions about this pairing

Which panel is better: JA Solar JAM72D30-550/GB/1500V or JA Solar JAM72D30-580/LB/1500V?
According to our database: JA Solar JAM72D30-580/LB/1500V has higher module efficiency (21.90% vs 21.30%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of JA Solar JAM72D30-550/GB/1500V and JA Solar JAM72D30-580/LB/1500V?
JA Solar JAM72D30-550/GB/1500V has a module efficiency of 21.30%, while JA Solar JAM72D30-580/LB/1500V is 21.90%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does JA Solar JAM72D30-550/GB/1500V use vs JA Solar JAM72D30-580/LB/1500V?
JA Solar JAM72D30-550/GB/1500V uses PERC cells; JA Solar JAM72D30-580/LB/1500V uses PERC. 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 JAM72D30-550/GB/1500V and JA Solar JAM72D30-580/LB/1500V?
JA Solar JAM72D30-550/GB/1500V has a 30 years power warranty; JA Solar JAM72D30-580/LB/1500V 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 JAM72D30-550/GB/1500V and JA Solar JAM72D30-580/LB/1500V bifacial panels?
Both JA Solar JAM72D30-550/GB/1500V and JA Solar JAM72D30-580/LB/1500V 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 314 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.