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

JA Solar JAM72D30-575/LB/1500V vs JA Solar JAM72D30-555/LB/1500V

JAM72D30-575/LB/1500V
575 Wp 21.70 % PERC Bifacial
Open panel page Datasheet PDF
VS
JAM72D30-555/LB/1500V
555 Wp 21.00 % PERC Bifacial
Open panel page Datasheet PDF
The verdict

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

The largest is module efficiency: 0.70 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 575/LB/1500V 555/LB/1500V Difference
Module efficiency 21.70 % 21.00 % 0.70 pp more efficient
Power density 217.3 Wp/m² 209.8 Wp/m² 7.6 Wp/m² higher
Rated power 575 Wp 555 Wp 20 W more power
Weight per kWp 56.5 kg/kWp 58.6 kg/kWp 2.0 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.
575/LB/1500V
18,935 kWh
555/LB/1500V
18,277 kWh
Lifetime gap
658 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario 575/LB/1500V 555/LB/1500V
Standard test conditions 25 °C 100.0% of rated power 575 W 555 W
Cool, bright day 40 °C 94.8% of rated power 545 W 526 W
Typical summer roof 55 °C 89.5% of rated power 515 W 497 W
Hot roof 70 °C 84.2% of rated power 484 W 468 W
03

Full specification

Parameter 575/LB/1500V 555/LB/1500V Difference
Power and efficiency
Rated power 575 Wp 555 Wp +20 W for 575/LB/1500V
Module efficiency 21.70 % 21.00 % +0.70 pp for 575/LB/1500V
Power density 217.3 Wp/m² 209.8 Wp/m² +7.6 Wp/m² for 575/LB/1500V
Open-circuit voltage 50.86 V 50.14 V Effectively the same
Voltage at max power 42.05 V 41.29 V Effectively the same
Short-circuit current 14.44 A 14.19 A Effectively the same
Current at max power 13.67 A 13.44 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 56.5 kg/kWp 58.6 kg/kWp -2.0 kg/kWp for 575/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
#7,421 vs #9,758
575/LB/1500V leads by 2,337 places
Power density
#7,324 vs #9,904
575/LB/1500V leads by 2,580 places
Heat behaviour
#10,419 vs #10,419
Tied - the same position in the database
Weight
#10,695 vs #11,787
575/LB/1500V leads by 1,092 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#5,574 vs #7,209
575/LB/1500V leads by 1,635 places
05

More useful comparisons

Open the full database
Same series, other bin
JA Solar JAM72D30-575/LB/1500V vs JA Solar JAM72D30-580/LB/1500V
One difference: module efficiency
Same series, other bin
JA Solar JAM72D30-575/LB/1500V vs JA Solar JAM72D30-570/LB/1500V
One difference: module efficiency
Same series, other bin
JA Solar JAM72D30-575/LB/1500V vs JA Solar JAM72D30-565/LB/1500V
3 differences, the largest is module efficiency
Same series, other bin
JA Solar JAM72D30-575/LB/1500V vs JA Solar JAM72D30-560/LB/1500V
3 differences, the largest is module efficiency
Same manufacturer
JA Solar JAM72D30-575/LB/1500V vs JA Solar JAM66D46-740/LB
14 differences, the largest is module efficiency
Same manufacturer
JA Solar JAM72D30-575/LB/1500V vs JA Solar JAM66D46-735/LB
14 differences, the largest is module efficiency
06

Written summary

07

Questions about this pairing

Which panel is better: JA Solar JAM72D30-575/LB/1500V or JA Solar JAM72D30-555/LB/1500V?
According to our database: JA Solar JAM72D30-575/LB/1500V has higher module efficiency (21.70% 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 JAM72D30-575/LB/1500V and JA Solar JAM72D30-555/LB/1500V?
JA Solar JAM72D30-575/LB/1500V has a module efficiency of 21.70%, while JA Solar JAM72D30-555/LB/1500V is 21.00%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does JA Solar JAM72D30-575/LB/1500V use vs JA Solar JAM72D30-555/LB/1500V?
JA Solar JAM72D30-575/LB/1500V uses PERC cells; JA Solar JAM72D30-555/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 JAM72D30-575/LB/1500V and JA Solar JAM72D30-555/LB/1500V?
JA Solar JAM72D30-575/LB/1500V has a 30 years power warranty; JA Solar JAM72D30-555/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 JAM72D30-575/LB/1500V and JA Solar JAM72D30-555/LB/1500V bifacial panels?
Both JA Solar JAM72D30-575/LB/1500V and JA Solar JAM72D30-555/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 340 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.