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JKM640N-78HL4-BDV-F9-EU vs JKM735N-66HL5-BDV-Z3-EU 7 of 19 identical Swap Change panels

Jinko Solar JKM640N-78HL4-BDV-F9-EU vs Jinko Solar JKM735N-66HL5-BDV-Z3-EU

Jinko Solar JKM640N-78HL4-BDV-F9-EU
JKM640N-78HL4-BDV-F9-EU
640 Wp 22.90 % TOPCon Bifacial
Open panel page Datasheet PDF
VS
Jinko Solar JKM735N-66HL5-BDV-Z3-EU
JKM735N-66HL5-BDV-Z3-EU
735 Wp 23.66 % TOPCon Bifacial
Open panel page Datasheet PDF
The verdict

JKM735N-66HL5-BDV-Z3-EU leads on the differences that matter

The largest is module efficiency: 0.76 pp more efficient. 7 of 19 comparable parameters are identical.

See all 12 differences
How alike are they
7 of 19 comparable
parameters are identical
identical differs
01

What actually differs

12 of 19 parameters
Parameter JKM640N-78HL4-BDV-F9-EU JKM735N-66HL5-BDV-Z3-EU Difference
Module efficiency 22.90 % 23.66 % 0.76 pp more efficient
Rated power 640 Wp 735 Wp 95 W more power
Weight 34.0 kg 37.5 kg 3.5 kg lighter
Power density 229.0 Wp/m² 236.6 Wp/m² 7.7 Wp/m² higher
Open-circuit voltage 57.34 V 49.52 V 7.82 V apart
Short-circuit current 13.98 A 18.88 A 4.90 A apart
Module area 2.795 m² 3.106 m² 0.311 m² apart
Voltage at max power 48.02 V 41.23 V 6.79 V apart
Current at max power 13.33 A 17.83 A 4.50 A apart
Cell count 156 132 24 cells apart
Weight per kWp 53.1 kg/kWp 51.0 kg/kWp 2.1 kg/kWp lighter
Dimensions 2465x1134x30 mm 2384x1303x33 mm 2465x1134x30 mm vs 2384x1303x33 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.
JKM640N-78HL4-BDV-F9-EU
21,473 kWh
JKM735N-66HL5-BDV-Z3-EU
24,661 kWh
Lifetime gap
3,188 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario JKM640N-78HL4-BDV-F9-EU JKM735N-66HL5-BDV-Z3-EU
Standard test conditions 25 °C 100.0% of rated power 640 W 735 W
Cool, bright day 40 °C 95.7% of rated power 612 W 703 W
Typical summer roof 55 °C 91.3% of rated power 584 W 671 W
Hot roof 70 °C 87.0% of rated power 556 W 639 W
03

Full specification

Parameter JKM640N-78HL4-BDV-F9-EU JKM735N-66HL5-BDV-Z3-EU Difference
Power and efficiency
Rated power 640 Wp 735 Wp +95 W for JKM735N-66HL5-BDV-Z3-EU
Module efficiency 22.90 % 23.66 % +0.76 pp for JKM735N-66HL5-BDV-Z3-EU
Power density 229.0 Wp/m² 236.6 Wp/m² +7.7 Wp/m² for JKM735N-66HL5-BDV-Z3-EU
Open-circuit voltage 57.34 V 49.52 V 7.82 V apart
Voltage at max power 48.02 V 41.23 V 6.79 V apart
Short-circuit current 13.98 A 18.88 A 4.90 A apart
Current at max power 13.33 A 17.83 A 4.50 A apart
Temperature
Temperature coefficient -0.290 %/°C -0.290 %/°C Same
Mechanical
Dimensions 2465x1134x30 mm 2384x1303x33 mm 2465x1134x30 mm vs 2384x1303x33 mm
Module area 2.795 m² 3.106 m² 0.311 m² apart
Weight 34.0 kg 37.5 kg -3.5 kg for JKM640N-78HL4-BDV-F9-EU
Weight per kWp 53.1 kg/kWp 51.0 kg/kWp -2.1 kg/kWp for JKM735N-66HL5-BDV-Z3-EU
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 156 132 24 cells apart
Bifacial Yes Yes Same
04

Against the whole database

14,005 panels
Efficiency
#2,359 vs #602
JKM735N-66HL5-BDV-Z3-EU leads by 1,757 places
Power density
#2,389 vs #582
JKM735N-66HL5-BDV-Z3-EU leads by 1,807 places
Heat behaviour
#2,165 vs #2,165
Tied - the same position in the database
Weight
#6,913 vs #4,360
JKM735N-66HL5-BDV-Z3-EU leads by 2,553 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#2,068 vs #239
JKM735N-66HL5-BDV-Z3-EU leads by 1,829 places
05

More useful comparisons

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Jinko Solar JKM735N-66HL5-BDV-Z3-EU vs Jinko Solar JKM710-735N-66HL5-BDV-Z3-EU (735W bin)
The same specification on paper
06

Written summary

07

Questions about this pairing

Which panel is better: Jinko Solar JKM640N-78HL4-BDV-F9-EU or Jinko Solar JKM735N-66HL5-BDV-Z3-EU?
According to our database: Jinko Solar JKM735N-66HL5-BDV-Z3-EU has higher module efficiency (23.66% 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 JKM640N-78HL4-BDV-F9-EU and Jinko Solar JKM735N-66HL5-BDV-Z3-EU?
Jinko Solar JKM640N-78HL4-BDV-F9-EU has a module efficiency of 22.90%, while Jinko Solar JKM735N-66HL5-BDV-Z3-EU is 23.66%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Jinko Solar JKM640N-78HL4-BDV-F9-EU use vs Jinko Solar JKM735N-66HL5-BDV-Z3-EU?
Jinko Solar JKM640N-78HL4-BDV-F9-EU uses TOPCon cells; Jinko Solar JKM735N-66HL5-BDV-Z3-EU 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 JKM640N-78HL4-BDV-F9-EU and Jinko Solar JKM735N-66HL5-BDV-Z3-EU?
Jinko Solar JKM640N-78HL4-BDV-F9-EU has a 30 years power warranty; Jinko Solar JKM735N-66HL5-BDV-Z3-EU 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 JKM640N-78HL4-BDV-F9-EU and Jinko Solar JKM735N-66HL5-BDV-Z3-EU bifacial panels?
Both Jinko Solar JKM640N-78HL4-BDV-F9-EU and Jinko Solar JKM735N-66HL5-BDV-Z3-EU 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 170 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.