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JAM60D42-540/LB vs JAM72D40-605/MB 8 of 19 identical Swap Change panels

JA Solar JAM60D42-540/LB vs JA Solar JAM72D40-605/MB

JA Solar JAM60D42-540/LB
JAM60D42-540/LB
540 Wp 23.10 % TOPCon Bifacial
Open panel page Datasheet PDF
VS
JA Solar JAM72D40-605/MB
JAM72D40-605/MB
605 Wp 23.40 % TOPCon Bifacial
Open panel page Datasheet PDF
The verdict

JAM72D40-605/MB leads on the differences that matter

The largest is rated power: 65 W more power. 8 of 19 comparable parameters are identical.

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

What actually differs

11 of 19 parameters
Parameter JAM60D42-540/LB JAM72D40-605/MB Difference
Rated power 540 Wp 605 Wp 65 W more power
Weight 28.8 kg 31.8 kg 3.0 kg lighter
Open-circuit voltage 44.33 V 53.00 V 8.67 V apart
Module area 2.339 m² 2.583 m² 0.244 m² apart
Module efficiency 23.10 % 23.40 % 0.30 pp more efficient
Short-circuit current 15.36 A 14.09 A 1.27 A apart
Power density 230.8 Wp/m² 234.2 Wp/m² 3.4 Wp/m² higher
Voltage at max power 37.25 V 45.05 V 7.80 V apart
Cell count 120 144 24 cells apart
Current at max power 14.50 A 13.43 A 1.07 A apart
Dimensions 2063x1134x30 mm 2278x1134x30 mm 2063x1134x30 mm vs 2278x1134x30 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.
JAM60D42-540/LB
18,118 kWh
JAM72D40-605/MB
20,299 kWh
Lifetime gap
2,181 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario JAM60D42-540/LB JAM72D40-605/MB
Standard test conditions 25 °C 100.0% of rated power 540 W 605 W
Cool, bright day 40 °C 95.7% of rated power 517 W 579 W
Typical summer roof 55 °C 91.3% of rated power 493 W 552 W
Hot roof 70 °C 87.0% of rated power 470 W 526 W
03

Full specification

Parameter JAM60D42-540/LB JAM72D40-605/MB Difference
Power and efficiency
Rated power 540 Wp 605 Wp +65 W for JAM72D40-605/MB
Module efficiency 23.10 % 23.40 % +0.30 pp for JAM72D40-605/MB
Power density 230.8 Wp/m² 234.2 Wp/m² +3.4 Wp/m² for JAM72D40-605/MB
Open-circuit voltage 44.33 V 53.00 V 8.67 V apart
Voltage at max power 37.25 V 45.05 V 7.80 V apart
Short-circuit current 15.36 A 14.09 A 1.27 A apart
Current at max power 14.50 A 13.43 A 1.07 A apart
Temperature
Temperature coefficient -0.290 %/°C -0.290 %/°C Same
Mechanical
Dimensions 2063x1134x30 mm 2278x1134x30 mm 2063x1134x30 mm vs 2278x1134x30 mm
Module area 2.339 m² 2.583 m² 0.244 m² apart
Weight 28.8 kg 31.8 kg -3.0 kg for JAM60D42-540/LB
Weight per kWp 53.3 kg/kWp 52.6 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 120 144 24 cells apart
Bifacial Yes Yes Same
04

Against the whole database

14,005 panels
Efficiency
#1,570 vs #882
JAM72D40-605/MB leads by 688 places
Power density
#1,649 vs #863
JAM72D40-605/MB leads by 786 places
Heat behaviour
#2,165 vs #2,165
Tied - the same position in the database
Weight
#7,178 vs #6,188
JAM72D40-605/MB leads by 990 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#5,107 vs #2,560
JAM72D40-605/MB leads by 2,547 places
05

More useful comparisons

Open the full database
Same series, other bin
JA Solar JAM60D42-540/LB vs JA Solar JAM60D42-545/LB
One difference: module efficiency
Same series, other bin
JA Solar JAM60D42-540/LB vs JA Solar JAM60D42-535/LB
One difference: module efficiency
Same series, other bin
JA Solar JAM60D42-540/LB vs JA Solar JAM60D42-530/LB
3 differences, the largest is module efficiency
Same series, other bin
JA Solar JAM60D42-540/LB vs JA Solar JAM60D42-525/LB
3 differences, the largest is module efficiency
Same series, other bin
JA Solar JAM60D42-540/LB vs JA Solar JAM60D42-520/LB
4 differences, the largest is module efficiency
Same series, other bin
JA Solar JAM60D42-540/LB vs JA Solar JAM60D41 510/LB
6 differences, the largest is rated power
06

Written summary

07

Questions about this pairing

Which panel is better: JA Solar JAM60D42-540/LB or JA Solar JAM72D40-605/MB?
According to our database: JA Solar JAM72D40-605/MB has higher module efficiency (23.40% vs 23.10%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of JA Solar JAM60D42-540/LB and JA Solar JAM72D40-605/MB?
JA Solar JAM60D42-540/LB has a module efficiency of 23.10%, while JA Solar JAM72D40-605/MB is 23.40%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does JA Solar JAM60D42-540/LB use vs JA Solar JAM72D40-605/MB?
JA Solar JAM60D42-540/LB uses TOPCon cells; JA Solar JAM72D40-605/MB 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 JAM60D42-540/LB and JA Solar JAM72D40-605/MB?
JA Solar JAM60D42-540/LB has a 30 years power warranty; JA Solar JAM72D40-605/MB 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 JAM60D42-540/LB and JA Solar JAM72D40-605/MB bifacial panels?
Both JA Solar JAM60D42-540/LB and JA Solar JAM72D40-605/MB 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 391 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.