JA Solar JAM78D40-600/MB/1500V vs JA Solar JAM78D40-605/MB/1500V
VS
The verdict
Identical on every published parameter
All 19 comparable parameters agree. Two records this alike are usually one panel sold under two names, or two bins of the same production line - decide on price and on who you would rather buy from.
How alike are they
19
of 19 comparable
parameters are identical
parameters are identical
identical
differs
01
0 of 19 parameters
What actually differs
Every comparable parameter agrees. The full specification is below.
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 (-0.300 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other.
600/MB/1500V
20,131 kWh
605/MB/1500V
20,299 kWh
Lifetime gap
168 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
600/MB/1500V
605/MB/1500V
Standard test conditions
25 °C
100.0% of rated power
600 W
605 W
Cool, bright day
40 °C
95.5% of rated power
573 W
578 W
Typical summer roof
55 °C
91.0% of rated power
546 W
551 W
Hot roof
70 °C
86.5% of rated power
519 W
523 W
03
Full specification
Parameter
600/MB/1500V
605/MB/1500V
Difference
Power and efficiency
Rated power
600 Wp
605 Wp
Effectively the same
Module efficiency
21.50 %
21.60 %
Effectively the same
Power density
214.6 Wp/m²
216.4 Wp/m²
Effectively the same
Open-circuit voltage
54.75 V
54.90 V
Effectively the same
Voltage at max power
45.67 V
45.80 V
Effectively the same
Short-circuit current
14.02 A
14.09 A
Effectively the same
Current at max power
13.14 A
13.21 A
Effectively the same
Temperature
Temperature coefficient
-0.300 %/°C
-0.300 %/°C
Same
Mechanical
Dimensions
2465x1134x35 mm
2465x1134x35 mm
Same
Module area
2.795 m²
2.795 m²
Same
Weight
34.6 kg
34.6 kg
Same
Weight per kWp
57.7 kg/kWp
57.2 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
N-type
N-type
Same
Cell type
Monocrystalline
Monocrystalline
Same
Cell count
156
156
Same
Bifacial
Yes
Yes
Same
04
14,005 panels
Against the whole database
Efficiency
#7,958
vs
#7,652
605/MB/1500V leads by 306 places
Power density
#8,200
vs
#7,601
605/MB/1500V leads by 599 places
Heat behaviour
#6,093
vs
#6,093
Tied - the same position in the database
Weight
#11,358
vs
#11,122
605/MB/1500V leads by 236 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#4,969
vs
#4,679
605/MB/1500V leads by 290 places
05
Open the full database
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06
Written summary
Checking cache...
07
Questions about this pairing
Which panel is better: JA Solar JAM78D40-600/MB/1500V or JA Solar JAM78D40-605/MB/1500V?
According to our database: JA Solar JAM78D40-605/MB/1500V has higher module efficiency (21.60% vs 21.50%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of JA Solar JAM78D40-600/MB/1500V and JA Solar JAM78D40-605/MB/1500V?
JA Solar JAM78D40-600/MB/1500V has a module efficiency of 21.50%, while JA Solar JAM78D40-605/MB/1500V is 21.60%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does JA Solar JAM78D40-600/MB/1500V use vs JA Solar JAM78D40-605/MB/1500V?
JA Solar JAM78D40-600/MB/1500V uses N-type cells; JA Solar JAM78D40-605/MB/1500V uses N-type. 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 JAM78D40-600/MB/1500V and JA Solar JAM78D40-605/MB/1500V?
JA Solar JAM78D40-600/MB/1500V has a 30 years power warranty; JA Solar JAM78D40-605/MB/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 JAM78D40-600/MB/1500V and JA Solar JAM78D40-605/MB/1500V bifacial panels?
Both JA Solar JAM78D40-600/MB/1500V and JA Solar JAM78D40-605/MB/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 393 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.