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JKM650N-78HL4-BDV vs JKM625-650N-78HL4-BDV (640W) 16 of 19 identical Swap Change panels

Jinko Solar JKM650N-78HL4-BDV vs Jinko Solar JKM625-650N-78HL4-BDV (640W)

Jinko Solar JKM650N-78HL4-BDV
JKM650N-78HL4-BDV
650 Wp 23.25 % TOPCon Bifacial
Open panel page Datasheet PDF
VS
Jinko Solar JKM625-650N-78HL4-BDV (640W)
JKM625-650N-78HL4-BDV (640W)
640 Wp 22.90 % TOPCon Bifacial
Open panel page Datasheet PDF
The verdict

JKM650N-78HL4-BDV leads on the differences that matter

The largest is module efficiency: 0.35 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 JKM650N-78HL4-BDV JKM625-650N-78HL4-BDV (640W) Difference
Module efficiency 23.25 % 22.90 % 0.35 pp more efficient
Power density 232.5 Wp/m² 229.0 Wp/m² 3.6 Wp/m² higher
Rated power 650 Wp 640 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.
JKM650N-78HL4-BDV
21,809 kWh
JKM625-650N-78HL4-BDV (640W)
21,473 kWh
Lifetime gap
336 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario JKM650N-78HL4-BDV JKM625-650N-78HL4-BDV (640W)
Standard test conditions 25 °C 100.0% of rated power 650 W 640 W
Cool, bright day 40 °C 95.7% of rated power 622 W 612 W
Typical summer roof 55 °C 91.3% of rated power 593 W 584 W
Hot roof 70 °C 87.0% of rated power 565 W 556 W
03

Full specification

Parameter JKM650N-78HL4-BDV JKM625-650N-78HL4-BDV (640W) Difference
Power and efficiency
Rated power 650 Wp 640 Wp +10 W for JKM650N-78HL4-BDV
Module efficiency 23.25 % 22.90 % +0.35 pp for JKM650N-78HL4-BDV
Power density 232.5 Wp/m² 229.0 Wp/m² +3.6 Wp/m² for JKM650N-78HL4-BDV
Open-circuit voltage 57.60 V 57.34 V Effectively the same
Voltage at max power 48.33 V 48.02 V Effectively the same
Short-circuit current 14.10 A 13.98 A Effectively the same
Current at max power 13.45 A 13.33 A Effectively the same
Temperature
Temperature coefficient -0.290 %/°C -0.290 %/°C Same
Mechanical
Dimensions 2465x1134x30 mm 2465x1134x30 mm Same
Module area 2.795 m² 2.795 m² Same
Weight 34.0 kg 34.0 kg Same
Weight per kWp 52.3 kg/kWp 53.1 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 156 156 Same
Bifacial Yes Yes Same
04

Against the whole database

14,005 panels
Efficiency
#1,239 vs #2,359
JKM650N-78HL4-BDV leads by 1,120 places
Power density
#1,222 vs #2,389
JKM650N-78HL4-BDV leads by 1,167 places
Heat behaviour
#2,165 vs #2,165
Tied - the same position in the database
Weight
#5,769 vs #6,913
JKM650N-78HL4-BDV leads by 1,144 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#1,648 vs #2,068
JKM650N-78HL4-BDV leads by 420 places
05

More useful comparisons

Open the full database
Same series, other bin
Jinko Solar JKM650N-78HL4-BDV vs Jinko Solar JKM625-650N-78HL4-BDV (650W)
The same specification on paper
Same series, other bin
Jinko Solar JKM650N-78HL4-BDV vs Jinko Solar JKM625-650N-78HL4-BDV
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Jinko Solar JKM650N-78HL4-BDV vs Jinko Solar JKM650N-78HL4-BDV-F9-EU
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Jinko Solar JKM650N-78HL4-BDV vs Jinko Solar JKM625-650N-78HL4-BDV (645W)
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Same series, other bin
Jinko Solar JKM650N-78HL4-BDV vs Jinko Solar JKM645N-78HL4-BDV-F9-EU
The same specification on paper
Same series, other bin
Jinko Solar JKM650N-78HL4-BDV vs Jinko Solar JKM645N-78HL4-BDV
The same specification on paper
06

Written summary

07

Questions about this pairing

Which panel is better: Jinko Solar JKM650N-78HL4-BDV or Jinko Solar JKM625-650N-78HL4-BDV (640W)?
According to our database: Jinko Solar JKM650N-78HL4-BDV has higher module efficiency (23.25% vs 22.90%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Jinko Solar JKM650N-78HL4-BDV and Jinko Solar JKM625-650N-78HL4-BDV (640W)?
Jinko Solar JKM650N-78HL4-BDV has a module efficiency of 23.25%, while Jinko Solar JKM625-650N-78HL4-BDV (640 W) is 22.90%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Jinko Solar JKM650N-78HL4-BDV use vs Jinko Solar JKM625-650N-78HL4-BDV (640W)?
Jinko Solar JKM650N-78HL4-BDV uses TOPCon cells; Jinko Solar JKM625-650N-78HL4-BDV (640 W) 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 Jinko Solar JKM650N-78HL4-BDV and Jinko Solar JKM625-650N-78HL4-BDV (640W)?
Jinko Solar JKM650N-78HL4-BDV has a 30 years power warranty; Jinko Solar JKM625-650N-78HL4-BDV (640 W) 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 JKM650N-78HL4-BDV and Jinko Solar JKM625-650N-78HL4-BDV (640W) bifacial panels?
Both Jinko Solar JKM650N-78HL4-BDV and Jinko Solar JKM625-650N-78HL4-BDV (640 W) 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.

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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.