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AIKO-A805-GRH78Dw vs M540M-144 1 of 18 identical Swap Change panels

AIKO AIKO-A805-GRH78Dw vs AIKO M540M-144

AIKO AIKO-A805-GRH78Dw
AIKO-A805-GRH78Dw
805 Wp 25.10 % Back Contact Bifacial Incomplete
Open panel page Datasheet PDF
VS
M540M-144
540 Wp 20.90 % PERC
Open panel page Datasheet PDF
The verdict

AIKO-A805-GRH78Dw leads on the differences that matter

The largest is module efficiency: 4.20 pp more efficient. 1 of 18 comparable parameters are identical, with 1 more left out because at least one datasheet does not publish it.

See all 17 differences
How alike are they
1 of 18 comparable
parameters are identical
identical differs not published
01

What actually differs

17 of 18 parameters
Parameter AIKO-A805-GRH78Dw M540M-144 Difference
Module efficiency 25.10 % 20.90 % 4.20 pp more efficient
Temperature coefficient -0.260 %/°C -0.360 %/°C 0.100 %/°C better in heat
Rated power 805 Wp 540 Wp 265 W more power
Power density 250.6 Wp/m² 208.9 Wp/m² 41.7 Wp/m² higher
Performance warranty 30 yrs 25 yrs 5 yrs longer
Weight 39.8 kg 29.0 kg 10.8 kg lighter
Product warranty 15 yrs 12 yrs 3 yrs longer
Open-circuit voltage 59.42 V 49.70 V 9.72 V apart
Short-circuit current 17.13 A 13.62 A 3.51 A apart
Module area 3.212 m² 2.584 m² 0.628 m² apart
Weight per kWp 49.4 kg/kWp 53.7 kg/kWp 4.3 kg/kWp lighter
Cell technology Back Contact PERC Back Contact vs PERC
Voltage at max power 49.46 V 41.90 V 7.56 V apart
Current at max power 16.28 A 12.89 A 3.39 A apart
Cell count 156 144 12 cells apart
Bifacial Yes No Yes vs No
Dimensions 2465x1303x33 mm 2279x1134x35 mm 2465x1303x33 mm vs 2279x1134x35 mm
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
AIKO-A805-GRH78Dw
27,009 kWh
M540M-144
18,118 kWh
Lifetime gap
8,891 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario AIKO-A805-GRH78Dw M540M-144
Standard test conditions 25 °C 100.0% of rated power 805 W 540 W
Cool, bright day 40 °C 94.6% of rated power 774 W 511 W
Typical summer roof 55 °C 89.2% of rated power 742 W 482 W
Hot roof 70 °C 83.8% of rated power 711 W 453 W
03

Full specification

Parameter AIKO-A805-GRH78Dw M540M-144 Difference
Power and efficiency
Rated power 805 Wp 540 Wp +265 W for AIKO-A805-GRH78Dw
Module efficiency 25.10 % 20.90 % +4.20 pp for AIKO-A805-GRH78Dw
Power density 250.6 Wp/m² 208.9 Wp/m² +41.7 Wp/m² for AIKO-A805-GRH78Dw
Open-circuit voltage 59.42 V 49.70 V 9.72 V apart
Voltage at max power 49.46 V 41.90 V 7.56 V apart
Short-circuit current 17.13 A 13.62 A 3.51 A apart
Current at max power 16.28 A 12.89 A 3.39 A apart
Temperature
Temperature coefficient -0.260 %/°C -0.360 %/°C +0.100 %/°C for AIKO-A805-GRH78Dw
Mechanical
Dimensions 2465x1303x33 mm 2279x1134x35 mm 2465x1303x33 mm vs 2279x1134x35 mm
Module area 3.212 m² 2.584 m² 0.628 m² apart
Weight 39.8 kg 29.0 kg -10.8 kg for M540M-144
Weight per kWp 49.4 kg/kWp 53.7 kg/kWp -4.3 kg/kWp for AIKO-A805-GRH78Dw
Warranty and degradation
Product warranty 15 yrs 12 yrs +3 yrs for AIKO-A805-GRH78Dw
Performance warranty 30 yrs 25 yrs +5 yrs for AIKO-A805-GRH78Dw
Annual degradation - 0.55 %/yr Not published by AIKO
Technology
Cell technology Back Contact PERC Back Contact vs PERC
Cell type Monocrystalline Monocrystalline Same
Cell count 156 144 12 cells apart
Bifacial Yes No Yes vs No
04

Against the whole database

14,129 panels
Efficiency
#3 vs #10,148
AIKO-A805-GRH78Dw leads by 10,145 places
Power density
#3 vs #10,278
AIKO-A805-GRH78Dw leads by 10,275 places
Heat behaviour
#515 vs #12,425
AIKO-A805-GRH78Dw leads by 11,910 places
Weight
#2,984 vs #7,781
AIKO-A805-GRH78Dw leads by 4,797 places
Warranty
#21 vs #9,912
AIKO-A805-GRH78Dw leads by 9,891 places
Overall
#1 vs #9,021
AIKO-A805-GRH78Dw leads by 9,020 places
05

More useful comparisons

Open the full database
Same series, other bin
AIKO AIKO-A805-GRH78Dw vs AIKO AIKO-A800-GRH78Dw
One difference: module efficiency
Same series, other bin
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 AIKO M540M-144?
According to our database: AIKO AIKO-A805-GRH78Dw has higher module efficiency (25.10% vs 20.90%); AIKO AIKO-A805-GRH78Dw tolerates heat better (temp coeff -0.260%/°C vs -0.360%/°C). 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 AIKO M540M-144?
AIKO AIKO-A805-GRH78Dw has a module efficiency of 25.10%, while AIKO M540M-144 is 20.90%. 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 AIKO M540M-144?
AIKO AIKO-A805-GRH78Dw uses Back Contact cells; AIKO M540M-144 uses PERC. 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 AIKO M540M-144?
AIKO AIKO-A805-GRH78Dw has a 30 years power warranty; AIKO M540M-144 has a 25 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 AIKO M540M-144 bifacial panels?
AIKO AIKO-A805-GRH78Dw is bifacial (captures light from both faces); AIKO M540M-144 is monofacial. Bifacial panels work best on ground mounts or raised structures with a light-coloured surface underneath.

Shop prices: See 131 AIKO 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.