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615/LB vs 625/LB 16 of 19 identical Swap Change panels

JA Solar JAM66D45-615/LB vs JA Solar JAM66D45-625/LB

JA Solar JAM66D45-615/LB
JAM66D45-615/LB
615 Wp 22.80 % TOPCon Bifacial
Open panel page Datasheet PDF
VS
JA Solar JAM66D45-625/LB
JAM66D45-625/LB
625 Wp 23.10 % TOPCon Bifacial
Open panel page Datasheet PDF
The verdict

625/LB leads on the differences that matter

The largest is module efficiency: 0.30 pp more efficient. 16 of 19 comparable parameters are identical.

See all 3 differences
How alike are they
16 of 19 comparable
parameters are identical
identical differs
01

What actually differs

3 of 19 parameters
Parameter 615/LB 625/LB Difference
Module efficiency 22.80 % 23.10 % 0.30 pp more efficient
Power density 227.7 Wp/m² 231.4 Wp/m² 3.7 Wp/m² higher
Rated power 615 Wp 625 Wp 10 W more power
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.
615/LB
20,634 kWh
625/LB
20,970 kWh
Lifetime gap
336 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario 615/LB 625/LB
Standard test conditions 25 °C 100.0% of rated power 615 W 625 W
Cool, bright day 40 °C 95.7% of rated power 588 W 598 W
Typical summer roof 55 °C 91.3% of rated power 561 W 571 W
Hot roof 70 °C 87.0% of rated power 535 W 543 W
03

Full specification

Parameter 615/LB 625/LB Difference
Power and efficiency
Rated power 615 Wp 625 Wp +10 W for 625/LB
Module efficiency 22.80 % 23.10 % +0.30 pp for 625/LB
Power density 227.7 Wp/m² 231.4 Wp/m² +3.7 Wp/m² for 625/LB
Open-circuit voltage 48.30 V 48.70 V Effectively the same
Voltage at max power 39.96 V 40.45 V Effectively the same
Short-circuit current 16.10 A 16.15 A Effectively the same
Current at max power 15.39 A 15.45 A Effectively the same
Temperature
Temperature coefficient -0.290 %/°C -0.290 %/°C Same
Mechanical
Dimensions 2382x1134x30 mm 2382x1134x30 mm Same
Module area 2.701 m² 2.701 m² Same
Weight 33.1 kg 33.1 kg Same
Weight per kWp 53.8 kg/kWp 53.0 kg/kWp Effectively the same
Warranty and degradation
Product warranty 12 yrs 12 yrs Same
Performance warranty 30 yrs 30 yrs Same
Annual degradation 0.40 %/yr 0.40 %/yr Same
Technology
Cell technology TOPCon TOPCon Same
Cell type Monocrystalline Monocrystalline Same
Cell count 132 132 Same
Bifacial Yes Yes Same
04

Against the whole database

14,005 panels
Efficiency
#2,714 vs #1,570
625/LB leads by 1,144 places
Power density
#3,077 vs #1,513
625/LB leads by 1,564 places
Heat behaviour
#2,165 vs #2,165
Tied - the same position in the database
Weight
#7,888 vs #6,680
625/LB leads by 1,208 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#2,894 vs #2,270
625/LB leads by 624 places
05

More useful comparisons

Open the full database
Same series, other bin
JA Solar JAM66D45-615/LB vs JA Solar JAM66D45-630/LB
3 differences, the largest is module efficiency
Same series, other bin
JA Solar JAM66D45-615/LB vs JA Solar JAM66D45-620/LB
One difference: module efficiency
Same series, other bin
JA Solar JAM66D45-615/LB vs JA Solar JAM66D45-610/LB
One difference: module efficiency
Same series, other bin
JA Solar JAM66D45-615/LB vs JA Solar JAM66D45-605/LB
3 differences, the largest is module efficiency
Same series, other bin
JA Solar JAM66D45-615/LB vs JA Solar JAM72D30-580/LB/1500V
14 differences, the largest is module efficiency
Same series, other bin
JA Solar JAM66D45-615/LB vs JA Solar JAM72D30-575/LB/1500V
14 differences, the largest is module efficiency
06

Written summary

07

Questions about this pairing

Which panel is better: JA Solar JAM66D45-615/LB or JA Solar JAM66D45-625/LB?
According to our database: JA Solar JAM66D45-625/LB has higher module efficiency (23.10% vs 22.80%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of JA Solar JAM66D45-615/LB and JA Solar JAM66D45-625/LB?
JA Solar JAM66D45-615/LB has a module efficiency of 22.80%, while JA Solar JAM66D45-625/LB is 23.10%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does JA Solar JAM66D45-615/LB use vs JA Solar JAM66D45-625/LB?
JA Solar JAM66D45-615/LB uses TOPCon cells; JA Solar JAM66D45-625/LB 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 JAM66D45-615/LB and JA Solar JAM66D45-625/LB?
JA Solar JAM66D45-615/LB has a 30 years power warranty; JA Solar JAM66D45-625/LB 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 JAM66D45-615/LB and JA Solar JAM66D45-625/LB bifacial panels?
Both JA Solar JAM66D45-615/LB and JA Solar JAM66D45-625/LB 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 341 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.