AIKO AIKO-A800-GRH78Dw vs AIKO AIKO-A620-MAH72Dw G
VS
The verdict
A800-GRH78Dw leads on the differences that matter
The largest is module efficiency: 1.40 pp more efficient. 4 of 18 comparable parameters are identical, with 1 more left out because at least one datasheet does not publish it.
See all 14 differencesHow alike are they
4
of 18 comparable
parameters are identical
parameters are identical
identical
differs
not published
01
14 of 18 parameters
What actually differs
Parameter
A800-GRH78Dw
A620-MAH72Dw G
Difference
Module efficiency
24.90 %
23.50 %
1.40 pp more efficient
Rated power
800 Wp
620 Wp
180 W more power
Power density
249.1 Wp/m²
235.4 Wp/m²
13.7 Wp/m² higher
Temperature coefficient
-0.260 %/°C
-0.290 %/°C
0.030 %/°C better in heat
Weight
39.8 kg
33.0 kg
6.8 kg lighter
Open-circuit voltage
59.32 V
53.55 V
5.77 V apart
Short-circuit current
17.06 A
14.23 A
2.83 A apart
Module area
3.212 m²
2.634 m²
0.578 m² apart
Weight per kWp
49.7 kg/kWp
53.2 kg/kWp
3.5 kg/kWp lighter
Cell technology
Back Contact
N-type
Back Contact vs N-type
Voltage at max power
49.36 V
45.08 V
4.28 V apart
Current at max power
16.21 A
13.76 A
2.45 A apart
Cell count
156
144
12 cells apart
Dimensions
2465x1303x33 mm
2323x1134x35 mm
2465x1303x33 mm vs 2323x1134x35 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
A800-GRH78Dw
26,842 kWh
A620-MAH72Dw G
20,802 kWh
Lifetime gap
6,040 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
A800-GRH78Dw
A620-MAH72Dw G
Standard test conditions
25 °C
100.0% of rated power
800 W
620 W
Cool, bright day
40 °C
95.7% of rated power
769 W
593 W
Typical summer roof
55 °C
91.3% of rated power
738 W
566 W
Hot roof
70 °C
87.0% of rated power
706 W
539 W
03
Full specification
Parameter
A800-GRH78Dw
A620-MAH72Dw G
Difference
Power and efficiency
Rated power
800 Wp
620 Wp
+180 W for A800-GRH78Dw
Module efficiency
24.90 %
23.50 %
+1.40 pp for A800-GRH78Dw
Power density
249.1 Wp/m²
235.4 Wp/m²
+13.7 Wp/m² for A800-GRH78Dw
Open-circuit voltage
59.32 V
53.55 V
5.77 V apart
Voltage at max power
49.36 V
45.08 V
4.28 V apart
Short-circuit current
17.06 A
14.23 A
2.83 A apart
Current at max power
16.21 A
13.76 A
2.45 A apart
Temperature
Temperature coefficient
-0.260 %/°C
-0.290 %/°C
+0.030 %/°C for A800-GRH78Dw
Mechanical
Dimensions
2465x1303x33 mm
2323x1134x35 mm
2465x1303x33 mm vs 2323x1134x35 mm
Module area
3.212 m²
2.634 m²
0.578 m² apart
Weight
39.8 kg
33.0 kg
-6.8 kg for A620-MAH72Dw G
Weight per kWp
49.7 kg/kWp
53.2 kg/kWp
-3.5 kg/kWp for A800-GRH78Dw
Warranty and degradation
Product warranty
15 yrs
15 yrs
Same
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
144
12 cells apart
Bifacial
Yes
Yes
Same
04
14,005 panels
Against the whole database
Efficiency
#10
vs
#716
A800-GRH78Dw leads by 706 places
Power density
#10
vs
#669
A800-GRH78Dw leads by 659 places
Heat behaviour
#511
vs
#2,165
A800-GRH78Dw leads by 1,654 places
Weight
#3,214
vs
#7,064
A800-GRH78Dw leads by 3,850 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#2
vs
#1,716
A800-GRH78Dw leads by 1,714 places
05
Open the full database
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06
Written summary
Checking cache...
07
Questions about this pairing
Which panel is better: AIKO AIKO-A800-GRH78Dw or AIKO AIKO-A620-MAH72Dw G?
According to our database: AIKO AIKO-A800-GRH78Dw has higher module efficiency (24.90% vs 23.50%); AIKO AIKO-A800-GRH78Dw tolerates heat better (temp coeff -0.260%/°C vs -0.290%/°C). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of AIKO AIKO-A800-GRH78Dw and AIKO AIKO-A620-MAH72Dw G?
AIKO AIKO-A800-GRH78Dw has a module efficiency of 24.90%, while AIKO AIKO-A620-MAH72Dw G is 23.50%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does AIKO AIKO-A800-GRH78Dw use vs AIKO AIKO-A620-MAH72Dw G?
AIKO AIKO-A800-GRH78Dw uses Back Contact cells; AIKO AIKO-A620-MAH72Dw G 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-A800-GRH78Dw and AIKO AIKO-A620-MAH72Dw G?
AIKO AIKO-A800-GRH78Dw has a 30 years power warranty; AIKO AIKO-A620-MAH72Dw G 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-A800-GRH78Dw and AIKO AIKO-A620-MAH72Dw G bifacial panels?
Both AIKO AIKO-A800-GRH78Dw and AIKO AIKO-A620-MAH72Dw G 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.
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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.