Jinko Solar JKM735N-66HL5-BDV-Z3-EU vs Jinko Solar JKM640N-66HL4M-BDV
VS
The verdict
7 differences, and they point both ways
The largest is rated power: 95 W more power. 12 of 19 comparable parameters are identical.
See all 7 differencesHow alike are they
12
of 19 comparable
parameters are identical
parameters are identical
identical
differs
01
7 of 19 parameters
What actually differs
Parameter
JKM735N-66HL5-BDV-Z3-EU
JKM640N-66HL4M-BDV
Difference
Rated power
735 Wp
640 Wp
95 W more power
Weight
37.5 kg
32.4 kg
5.1 kg lighter
Short-circuit current
18.88 A
16.32 A
2.56 A apart
Module area
3.106 m²
2.701 m²
0.405 m² apart
Cell technology
TOPCon
N-type
TOPCon vs N-type
Current at max power
17.83 A
15.50 A
2.33 A apart
Dimensions
2384x1303x33 mm
2382x1134x30 mm
2384x1303x33 mm vs 2382x1134x30 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.
JKM735N-66HL5-BDV-Z3-EU
24,661 kWh
JKM640N-66HL4M-BDV
21,473 kWh
Lifetime gap
3,188 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
JKM735N-66HL5-BDV-Z3-EU
JKM640N-66HL4M-BDV
Standard test conditions
25 °C
100.0% of rated power
735 W
640 W
Cool, bright day
40 °C
95.7% of rated power
703 W
612 W
Typical summer roof
55 °C
91.3% of rated power
671 W
584 W
Hot roof
70 °C
87.0% of rated power
639 W
556 W
03
Full specification
Parameter
JKM735N-66HL5-BDV-Z3-EU
JKM640N-66HL4M-BDV
Difference
Power and efficiency
Rated power
735 Wp
640 Wp
+95 W for JKM735N-66HL5-BDV-Z3-EU
Module efficiency
23.66 %
23.69 %
Effectively the same
Power density
236.6 Wp/m²
236.9 Wp/m²
Effectively the same
Open-circuit voltage
49.52 V
49.88 V
Effectively the same
Voltage at max power
41.23 V
41.30 V
Effectively the same
Short-circuit current
18.88 A
16.32 A
2.56 A apart
Current at max power
17.83 A
15.50 A
2.33 A apart
Temperature
Temperature coefficient
-0.290 %/°C
-0.290 %/°C
Same
Mechanical
Dimensions
2384x1303x33 mm
2382x1134x30 mm
2384x1303x33 mm vs 2382x1134x30 mm
Module area
3.106 m²
2.701 m²
0.405 m² apart
Weight
37.5 kg
32.4 kg
-5.1 kg for JKM640N-66HL4M-BDV
Weight per kWp
51.0 kg/kWp
50.6 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
N-type
TOPCon vs N-type
Cell type
Monocrystalline
Monocrystalline
Same
Cell count
132
132
Same
Bifacial
Yes
Yes
Same
04
14,005 panels
Against the whole database
Efficiency
#602
vs
#580
JKM640N-66HL4M-BDV leads by 22 places
Power density
#582
vs
#521
JKM640N-66HL4M-BDV leads by 61 places
Heat behaviour
#2,165
vs
#2,165
Tied - the same position in the database
Weight
#4,360
vs
#4,069
JKM640N-66HL4M-BDV leads by 291 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#239
vs
#1,530
JKM735N-66HL5-BDV-Z3-EU leads by 1,291 places
05
Open the full database
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3 differences, the largest is module efficiency
06
Written summary
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07
Questions about this pairing
Which panel is better: Jinko Solar JKM735N-66HL5-BDV-Z3-EU or Jinko Solar JKM640N-66HL4M-BDV?
According to our database: Jinko Solar JKM640N-66HL4M-BDV has higher module efficiency (23.69% vs 23.66%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Jinko Solar JKM735N-66HL5-BDV-Z3-EU and Jinko Solar JKM640N-66HL4M-BDV?
Jinko Solar JKM735N-66HL5-BDV-Z3-EU has a module efficiency of 23.66%, while Jinko Solar JKM640N-66HL4M-BDV is 23.69%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Jinko Solar JKM735N-66HL5-BDV-Z3-EU use vs Jinko Solar JKM640N-66HL4M-BDV?
Jinko Solar JKM735N-66HL5-BDV-Z3-EU uses TOPCon cells; Jinko Solar JKM640N-66HL4M-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 JKM735N-66HL5-BDV-Z3-EU and Jinko Solar JKM640N-66HL4M-BDV?
Jinko Solar JKM735N-66HL5-BDV-Z3-EU has a 30 years power warranty; Jinko Solar JKM640N-66HL4M-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 JKM735N-66HL5-BDV-Z3-EU and Jinko Solar JKM640N-66HL4M-BDV bifacial panels?
Both Jinko Solar JKM735N-66HL5-BDV-Z3-EU and Jinko Solar JKM640N-66HL4M-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 171 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.