Jinko Solar JKM615N-78HL4-BDV vs Jinko Solar JKM620N-78HL4-BDV
VS
The verdict
Identical on every published parameter
All 18 comparable parameters agree, with 1 more left out because at least one datasheet does not publish it. 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
18
of 18 comparable
parameters are identical
parameters are identical
identical
differs
not published
01
0 of 18 parameters
What actually differs
Every comparable parameter agrees. The full specification is below.
02
What it means on a roof
Thirty years of production
A 1.0% first-year loss then 0.40% a year, assumed for both panels, 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.
JKM615N-78HL4-BDV
20,634 kWh
JKM620N-78HL4-BDV
20,802 kWh
Lifetime gap
168 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
JKM615N-78HL4-BDV
JKM620N-78HL4-BDV
Standard test conditions
25 °C
100.0% of rated power
615 W
620 W
Cool, bright day
40 °C
95.5% of rated power
587 W
592 W
Typical summer roof
55 °C
91.0% of rated power
560 W
564 W
Hot roof
70 °C
86.5% of rated power
532 W
536 W
03
Full specification
Parameter
JKM615N-78HL4-BDV
JKM620N-78HL4-BDV
Difference
Power and efficiency
Rated power
615 Wp
620 Wp
Effectively the same
Module efficiency
22.00 %
22.18 %
Effectively the same
Power density
220.0 Wp/m²
221.8 Wp/m²
Effectively the same
Open-circuit voltage
55.44 V
55.58 V
Effectively the same
Voltage at max power
45.77 V
45.93 V
Effectively the same
Short-circuit current
14.11 A
14.19 A
Effectively the same
Current at max power
13.44 A
13.50 A
Effectively the same
Temperature
Temperature coefficient
-0.300 %/°C
-0.300 %/°C
Same
Mechanical
Dimensions
2465x1134x30 mm
2465x1134x30 mm
Same
Module area
2.795 m²
2.795 m²
Same
Weight
34.6 kg
34.6 kg
Same
Weight per kWp
56.3 kg/kWp
55.8 kg/kWp
Effectively the same
Warranty and degradation
Product warranty
12 yrs
12 yrs
Same
Performance warranty
30 yrs
30 yrs
Same
Annual degradation
-
-
Neither datasheet publishes this
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
#6,517
vs
#5,930
JKM620N-78HL4-BDV leads by 587 places
Power density
#6,655
vs
#5,869
JKM620N-78HL4-BDV leads by 786 places
Heat behaviour
#6,093
vs
#6,093
Tied - the same position in the database
Weight
#10,534
vs
#10,192
JKM620N-78HL4-BDV leads by 342 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#3,865
vs
#3,481
JKM620N-78HL4-BDV leads by 384 places
05
Open the full database
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06
Written summary
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07
Questions about this pairing
Which panel is better: Jinko Solar JKM615N-78HL4-BDV or Jinko Solar JKM620N-78HL4-BDV?
According to our database: Jinko Solar JKM620N-78HL4-BDV has higher module efficiency (22.18% vs 22.00%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Jinko Solar JKM615N-78HL4-BDV and Jinko Solar JKM620N-78HL4-BDV?
Jinko Solar JKM615N-78HL4-BDV has a module efficiency of 22.00%, while Jinko Solar JKM620N-78HL4-BDV is 22.18%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Jinko Solar JKM615N-78HL4-BDV use vs Jinko Solar JKM620N-78HL4-BDV?
Jinko Solar JKM615N-78HL4-BDV uses N-type cells; Jinko Solar JKM620N-78HL4-BDV 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 Jinko Solar JKM615N-78HL4-BDV and Jinko Solar JKM620N-78HL4-BDV?
Jinko Solar JKM615N-78HL4-BDV has a 30 years power warranty; Jinko Solar JKM620N-78HL4-BDV 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 Jinko Solar JKM615N-78HL4-BDV and Jinko Solar JKM620N-78HL4-BDV bifacial panels?
Both Jinko Solar JKM615N-78HL4-BDV and Jinko Solar JKM620N-78HL4-BDV 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 174 Jinko 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.