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555/LB/1500V vs 580/LB/1500V 15 of 19 identical Swap Change panels

JA Solar JAM72D30-555/LB/1500V vs JA Solar JAM72D30-580/LB/1500V

JAM72D30-555/LB/1500V
555 Wp 21.00 % 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: 0.90 pp more efficient. 15 of 19 comparable parameters are identical.

See all 4 differences
How alike are they
15 of 19 comparable
parameters are identical
identical differs
01

What actually differs

4 of 19 parameters
Parameter 555/LB/1500V 580/LB/1500V Difference
Module efficiency 21.00 % 21.90 % 0.90 pp more efficient
Power density 209.8 Wp/m² 219.2 Wp/m² 9.4 Wp/m² higher
Rated power 555 Wp 580 Wp 25 W more power
Weight per kWp 58.6 kg/kWp 56.0 kg/kWp 2.5 kg/kWp lighter
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.
555/LB/1500V
18,277 kWh
580/LB/1500V
19,100 kWh
Lifetime gap
823 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario 555/LB/1500V 580/LB/1500V
Standard test conditions 25 °C 100.0% of rated power 555 W 580 W
Cool, bright day 40 °C 94.8% of rated power 526 W 550 W
Typical summer roof 55 °C 89.5% of rated power 497 W 519 W
Hot roof 70 °C 84.2% of rated power 468 W 489 W
03

Full specification

Parameter 555/LB/1500V 580/LB/1500V Difference
Power and efficiency
Rated power 555 Wp 580 Wp +25 W for 580/LB/1500V
Module efficiency 21.00 % 21.90 % +0.90 pp for 580/LB/1500V
Power density 209.8 Wp/m² 219.2 Wp/m² +9.4 Wp/m² for 580/LB/1500V
Open-circuit voltage 50.14 V 51.04 V Effectively the same
Voltage at max power 41.29 V 42.24 V Effectively the same
Short-circuit current 14.19 A 14.50 A Effectively the same
Current at max power 13.44 A 13.73 A Effectively the same
Temperature
Temperature coefficient -0.350 %/°C -0.350 %/°C Same
Mechanical
Dimensions 2333x1134x30 mm 2333x1134x30 mm Same
Module area 2.646 m² 2.646 m² Same
Weight 32.5 kg 32.5 kg Same
Weight per kWp 58.6 kg/kWp 56.0 kg/kWp -2.5 kg/kWp for 580/LB/1500V
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

14,005 panels
Efficiency
#9,758 vs #6,783
580/LB/1500V leads by 2,975 places
Power density
#9,904 vs #6,733
580/LB/1500V leads by 3,171 places
Heat behaviour
#10,419 vs #10,419
Tied - the same position in the database
Weight
#11,787 vs #10,343
580/LB/1500V leads by 1,444 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#7,209 vs #5,178
580/LB/1500V leads by 2,031 places
05

More useful comparisons

Open the full database
Same series, other bin
JA Solar JAM72D30-555/LB/1500V vs JA Solar JAM72D30-575/LB/1500V
4 differences, the largest is module efficiency
Same series, other bin
JA Solar JAM72D30-555/LB/1500V vs JA Solar JAM72D30-570/LB/1500V
3 differences, the largest is module efficiency
Same series, other bin
JA Solar JAM72D30-555/LB/1500V vs JA Solar JAM72D30-565/LB/1500V
3 differences, the largest is module efficiency
Same series, other bin
JA Solar JAM72D30-555/LB/1500V vs JA Solar JAM72D30-560/LB/1500V
One difference: module efficiency
Same manufacturer
JA Solar JAM72D30-555/LB/1500V vs JA Solar JAM66D46-740/LB
13 differences, the largest is module efficiency
Same manufacturer
JA Solar JAM72D30-555/LB/1500V vs JA Solar JAM66D46-735/LB
13 differences, the largest is module efficiency
06

Written summary

07

Questions about this pairing

Which panel is better: JA Solar JAM72D30-555/LB/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 21.00%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of JA Solar JAM72D30-555/LB/1500V and JA Solar JAM72D30-580/LB/1500V?
JA Solar JAM72D30-555/LB/1500V has a module efficiency of 21.00%, 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 JAM72D30-555/LB/1500V use vs JA Solar JAM72D30-580/LB/1500V?
JA Solar JAM72D30-555/LB/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 JAM72D30-555/LB/1500V and JA Solar JAM72D30-580/LB/1500V?
JA Solar JAM72D30-555/LB/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 JAM72D30-555/LB/1500V and JA Solar JAM72D30-580/LB/1500V bifacial panels?
Both JA Solar JAM72D30-555/LB/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 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.