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JKM615-635N-78HL4-(V)-F6-EN (620W variant) vs JKM720N-66HL5-BDV-Z3-EU 5 of 19 identical Swap Change panels

Jinko Solar JKM615-635N-78HL4-(V)-F6-EN (620W variant) vs Jinko Solar JKM720N-66HL5-BDV-Z3-EU

JKM615-635N-78HL4-(V)-F6-EN (620W variant)
620 Wp 22.18 % N-type
Open panel page Datasheet PDF
VS
Jinko Solar JKM720N-66HL5-BDV-Z3-EU
JKM720N-66HL5-BDV-Z3-EU
720 Wp 23.18 % TOPCon Bifacial
Open panel page Datasheet PDF
The verdict

JKM720N-66HL5-BDV-Z3-EU leads on the differences that matter

The largest is module efficiency: 1.00 pp more efficient. 5 of 19 comparable parameters are identical.

See all 14 differences
How alike are they
5 of 19 comparable
parameters are identical
identical differs
01

What actually differs

14 of 19 parameters
Parameter JKM615-635N-78HL4-(V)-F6-EN (620W variant) JKM720N-66HL5-BDV-Z3-EU Difference
Module efficiency 22.18 % 23.18 % 1.00 pp more efficient
Rated power 620 Wp 720 Wp 100 W more power
Power density 221.8 Wp/m² 231.8 Wp/m² 10.0 Wp/m² higher
Weight 29.5 kg 37.5 kg 8.0 kg lighter
Open-circuit voltage 56.40 V 49.04 V 7.36 V apart
Short-circuit current 13.86 A 18.67 A 4.81 A apart
Module area 2.795 m² 3.106 m² 0.311 m² apart
Weight per kWp 47.6 kg/kWp 52.1 kg/kWp 4.5 kg/kWp lighter
Cell technology N-type TOPCon N-type vs TOPCon
Voltage at max power 46.97 V 40.89 V 6.08 V apart
Current at max power 13.20 A 17.61 A 4.41 A apart
Cell count 156 132 24 cells apart
Bifacial No Yes No vs Yes
Dimensions 2465x1134x35 mm 2384x1303x33 mm 2465x1134x35 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.
JKM615-635N-78HL4-(V)-F6-EN (620W variant)
20,802 kWh
JKM720N-66HL5-BDV-Z3-EU
24,157 kWh
Lifetime gap
3,355 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario JKM615-635N-78HL4-(V)-F6-EN (620W variant) JKM720N-66HL5-BDV-Z3-EU
Standard test conditions 25 °C 100.0% of rated power 620 W 720 W
Cool, bright day 40 °C 95.7% of rated power 593 W 689 W
Typical summer roof 55 °C 91.3% of rated power 566 W 657 W
Hot roof 70 °C 87.0% of rated power 539 W 626 W
03

Full specification

Parameter JKM615-635N-78HL4-(V)-F6-EN (620W variant) JKM720N-66HL5-BDV-Z3-EU Difference
Power and efficiency
Rated power 620 Wp 720 Wp +100 W for JKM720N-66HL5-BDV-Z3-EU
Module efficiency 22.18 % 23.18 % +1.00 pp for JKM720N-66HL5-BDV-Z3-EU
Power density 221.8 Wp/m² 231.8 Wp/m² +10.0 Wp/m² for JKM720N-66HL5-BDV-Z3-EU
Open-circuit voltage 56.40 V 49.04 V 7.36 V apart
Voltage at max power 46.97 V 40.89 V 6.08 V apart
Short-circuit current 13.86 A 18.67 A 4.81 A apart
Current at max power 13.20 A 17.61 A 4.41 A apart
Temperature
Temperature coefficient -0.290 %/°C -0.290 %/°C Same
Mechanical
Dimensions 2465x1134x35 mm 2384x1303x33 mm 2465x1134x35 mm vs 2384x1303x33 mm
Module area 2.795 m² 3.106 m² 0.311 m² apart
Weight 29.5 kg 37.5 kg -8.0 kg for JKM615-635N-78HL4-(V)-F6-EN (620W variant)
Weight per kWp 47.6 kg/kWp 52.1 kg/kWp -4.5 kg/kWp for JKM615-635N-78HL4-(V)-F6-EN (620W variant)
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 TOPCon N-type vs TOPCon
Cell type Monocrystalline Monocrystalline Same
Cell count 156 132 24 cells apart
Bifacial No Yes No vs Yes
04

Against the whole database

14,129 panels
Efficiency
#5,994 vs #1,468
JKM720N-66HL5-BDV-Z3-EU leads by 4,526 places
Power density
#5,933 vs #1,390
JKM720N-66HL5-BDV-Z3-EU leads by 4,543 places
Heat behaviour
#2,220 vs #2,220
Tied - the same position in the database
Weight
#1,762 vs #5,553
JKM615-635N-78HL4-(V)-F6-EN (620W variant) leads by 3,791 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#3,410 vs #543
JKM720N-66HL5-BDV-Z3-EU leads by 2,867 places
05

More useful comparisons

Open the full database
Same series, other bin
Jinko Solar JKM615-635N-78HL4-(V)-F6-EN (620W variant) vs Jinko Solar JKM615-635N-78HL4-(V)-F6-EN (635W variant)
3 differences, the largest is module efficiency
Same series, other bin
Jinko Solar JKM615-635N-78HL4-(V)-F6-EN (620W variant) vs Jinko Solar JKM615-635N-78HL4-(V)-F6-EN (630W variant)
3 differences, the largest is module efficiency
Same series, other bin
Jinko Solar JKM615-635N-78HL4-(V)-F6-EN (620W variant) vs Jinko Solar JKM615-635N-78HL4-(V)-F6-EN (625W variant)
The same specification on paper
Same series, other bin
Jinko Solar JKM615-635N-78HL4-(V)-F6-EN (620W variant) vs Jinko Solar JKM615-635N-78HL4-(V)-F6-EN (615W variant)
The same specification on paper
Same series, other bin
Jinko Solar JKM720N-66HL5-BDV-Z3-EU vs Jinko Solar JKM710-735N-66HL5-BDV-Z3-EU (735W bin)
3 differences, the largest is module efficiency
Same series, other bin
Jinko Solar JKM720N-66HL5-BDV-Z3-EU vs Jinko Solar JKM735N-66HL5-BDV-Z3-EU
3 differences, the largest is module efficiency
06

Written summary

07

Questions about this pairing

Which panel is better: Jinko Solar JKM615-635N-78HL4-(V)-F6-EN (620W variant) or Jinko Solar JKM720N-66HL5-BDV-Z3-EU?
According to our database: Jinko Solar JKM720N-66HL5-BDV-Z3-EU has higher module efficiency (23.18% vs 22.18%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Jinko Solar JKM615-635N-78HL4-(V)-F6-EN (620W variant) and Jinko Solar JKM720N-66HL5-BDV-Z3-EU?
Jinko Solar JKM615-635N-78HL4-(V)-F6-EN (620 W variant) has a module efficiency of 22.18%, while Jinko Solar JKM720N-66HL5-BDV-Z3-EU is 23.18%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Jinko Solar JKM615-635N-78HL4-(V)-F6-EN (620W variant) use vs Jinko Solar JKM720N-66HL5-BDV-Z3-EU?
Jinko Solar JKM615-635N-78HL4-(V)-F6-EN (620 W variant) uses N-type cells; Jinko Solar JKM720N-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 JKM615-635N-78HL4-(V)-F6-EN (620W variant) and Jinko Solar JKM720N-66HL5-BDV-Z3-EU?
Jinko Solar JKM615-635N-78HL4-(V)-F6-EN (620 W variant) has a 30 years power warranty; Jinko Solar JKM720N-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 JKM615-635N-78HL4-(V)-F6-EN (620W variant) and Jinko Solar JKM720N-66HL5-BDV-Z3-EU bifacial panels?
Jinko Solar JKM720N-66HL5-BDV-Z3-EU is bifacial (captures light from both faces); Jinko Solar JKM615-635N-78HL4-(V)-F6-EN (620 W variant) is monofacial. Bifacial panels work best on ground mounts or raised structures with a light-coloured surface underneath.

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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.