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AIKO-A805-GRH78Dw vs JKM665N-66QL6-BDV-F4-EU 5 of 18 identical Swap Change panels

AIKO AIKO-A805-GRH78Dw vs Jinko Solar JKM665N-66QL6-BDV-F4-EU

AIKO AIKO-A805-GRH78Dw
AIKO-A805-GRH78Dw
805 Wp 25.10 % Back Contact Bifacial Incomplete
Open panel page Datasheet PDF
VS
Jinko Solar JKM665N-66QL6-BDV-F4-EU
JKM665N-66QL6-BDV-F4-EU
665 Wp 24.62 % N-type Bifacial
Open panel page Datasheet PDF
The verdict

AIKO-A805-GRH78Dw leads on the differences that matter

The largest is rated power: 140 W more power. 5 of 18 comparable parameters are identical, with 1 more left out because at least one datasheet does not publish it.

See all 13 differences
How alike are they
5 of 18 comparable
parameters are identical
identical differs not published
01

What actually differs

13 of 18 parameters
Parameter AIKO-A805-GRH78Dw JKM665N-66QL6-BDV-F4-EU Difference
Rated power 805 Wp 665 Wp 140 W more power
Module efficiency 25.10 % 24.62 % 0.48 pp more efficient
Weight 39.8 kg 32.5 kg 7.3 kg lighter
Product warranty 15 yrs 12 yrs 3 yrs longer
Open-circuit voltage 59.42 V 50.55 V 8.87 V apart
Module area 3.212 m² 2.701 m² 0.511 m² apart
Power density 250.6 Wp/m² 246.2 Wp/m² 4.4 Wp/m² higher
Cell technology Back Contact N-type Back Contact vs N-type
Voltage at max power 49.46 V 42.85 V 6.61 V apart
Cell count 156 264 108 cells apart
Short-circuit current 17.13 A 16.24 A 0.89 A apart
Dimensions 2465x1303x33 mm 2382x1134x30 mm 2465x1303x33 mm vs 2382x1134x30 mm
Current at max power 16.28 A 15.52 A 0.76 A apart
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 (-0.260 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other.
AIKO-A805-GRH78Dw
27,009 kWh
JKM665N-66QL6-BDV-F4-EU
22,312 kWh
Lifetime gap
4,697 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario AIKO-A805-GRH78Dw JKM665N-66QL6-BDV-F4-EU
Standard test conditions 25 °C 100.0% of rated power 805 W 665 W
Cool, bright day 40 °C 96.1% of rated power 774 W 639 W
Typical summer roof 55 °C 92.2% of rated power 742 W 613 W
Hot roof 70 °C 88.3% of rated power 711 W 587 W
03

Full specification

Parameter AIKO-A805-GRH78Dw JKM665N-66QL6-BDV-F4-EU Difference
Power and efficiency
Rated power 805 Wp 665 Wp +140 W for AIKO-A805-GRH78Dw
Module efficiency 25.10 % 24.62 % +0.48 pp for AIKO-A805-GRH78Dw
Power density 250.6 Wp/m² 246.2 Wp/m² +4.4 Wp/m² for AIKO-A805-GRH78Dw
Open-circuit voltage 59.42 V 50.55 V 8.87 V apart
Voltage at max power 49.46 V 42.85 V 6.61 V apart
Short-circuit current 17.13 A 16.24 A 0.89 A apart
Current at max power 16.28 A 15.52 A 0.76 A apart
Temperature
Temperature coefficient -0.260 %/°C -0.260 %/°C Same
Mechanical
Dimensions 2465x1303x33 mm 2382x1134x30 mm 2465x1303x33 mm vs 2382x1134x30 mm
Module area 3.212 m² 2.701 m² 0.511 m² apart
Weight 39.8 kg 32.5 kg -7.3 kg for JKM665N-66QL6-BDV-F4-EU
Weight per kWp 49.4 kg/kWp 48.9 kg/kWp Effectively the same
Warranty and degradation
Product warranty 15 yrs 12 yrs +3 yrs for AIKO-A805-GRH78Dw
Performance warranty 30 yrs 30 yrs Same
Annual degradation - 0.35 %/yr Not published by AIKO
Technology
Cell technology Back Contact N-type Back Contact vs N-type
Cell type Monocrystalline Monocrystalline Same
Cell count 156 264 108 cells apart
Bifacial Yes Yes Same
04

Against the whole database

14,005 panels
Efficiency
#3 vs #42
AIKO-A805-GRH78Dw leads by 39 places
Power density
#3 vs #42
AIKO-A805-GRH78Dw leads by 39 places
Heat behaviour
#511 vs #511
Tied - the same position in the database
Weight
#2,977 vs #2,555
JKM665N-66QL6-BDV-F4-EU leads by 422 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#1 vs #634
AIKO-A805-GRH78Dw leads by 633 places
05

More useful comparisons

Open the full database
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AIKO AIKO-A805-GRH78Dw vs AIKO AIKO-A800-GRH78Dw
One difference: module efficiency
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AIKO AIKO-A805-GRH78Dw vs AIKO AIKO-A795-GRH78Dw
3 differences, the largest is module efficiency
Same series, other bin
AIKO AIKO-A805-GRH78Dw vs AIKO AIKO-A790-GRH78Dw
3 differences, the largest is module efficiency
Same series, other bin
AIKO AIKO-A805-GRH78Dw vs AIKO AIKO-A785-GRH78Dw
3 differences, the largest is module efficiency
Same series, other bin
AIKO AIKO-A805-GRH78Dw vs AIKO AIKO-A780-GRH78Dw
3 differences, the largest is module efficiency
Same series, other bin
AIKO AIKO-A805-GRH78Dw vs AIKO AIKO-A775-GRH78Dw
3 differences, the largest is module efficiency
06

Written summary

07

Questions about this pairing

Which panel is better: AIKO AIKO-A805-GRH78Dw or Jinko Solar JKM665N-66QL6-BDV-F4-EU?
According to our database: AIKO AIKO-A805-GRH78Dw has higher module efficiency (25.10% vs 24.62%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of AIKO AIKO-A805-GRH78Dw and Jinko Solar JKM665N-66QL6-BDV-F4-EU?
AIKO AIKO-A805-GRH78Dw has a module efficiency of 25.10%, while Jinko Solar JKM665N-66QL6-BDV-F4-EU is 24.62%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does AIKO AIKO-A805-GRH78Dw use vs Jinko Solar JKM665N-66QL6-BDV-F4-EU?
AIKO AIKO-A805-GRH78Dw uses Back Contact cells; Jinko Solar JKM665N-66QL6-BDV-F4-EU 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 AIKO AIKO-A805-GRH78Dw and Jinko Solar JKM665N-66QL6-BDV-F4-EU?
AIKO AIKO-A805-GRH78Dw has a 30 years power warranty; Jinko Solar JKM665N-66QL6-BDV-F4-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 AIKO AIKO-A805-GRH78Dw and Jinko Solar JKM665N-66QL6-BDV-F4-EU bifacial panels?
Both AIKO AIKO-A805-GRH78Dw and Jinko Solar JKM665N-66QL6-BDV-F4-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.
Compare AIKO and Jinko Solar as manufacturers Portfolio, efficiency, cell technologies and warranty terms

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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.