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LR7-72HVHF-670M vs AIKO-A770-GRH78Dw 4 of 18 identical Swap Change panels

Longi Solar LR7-72HVHF-670M vs AIKO AIKO-A770-GRH78Dw

Longi Solar LR7-72HVHF-670M
LR7-72HVHF-670M
670 Wp 24.80 % N-type
Open panel page Datasheet PDF
VS
AIKO AIKO-A770-GRH78Dw
AIKO-A770-GRH78Dw
770 Wp 24.00 % Back Contact Bifacial Incomplete
Open panel page Datasheet PDF
The verdict

LR7-72HVHF-670M leads on the differences that matter

The largest is module efficiency: 0.80 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 differences
How alike are they
4 of 18 comparable
parameters are identical
identical differs not published
01

What actually differs

14 of 18 parameters
Parameter LR7-72HVHF-670M AIKO-A770-GRH78Dw Difference
Module efficiency 24.80 % 24.00 % 0.80 pp more efficient
Rated power 670 Wp 770 Wp 100 W more power
Weight 28.5 kg 39.8 kg 11.3 kg lighter
Weight per kWp 42.5 kg/kWp 51.7 kg/kWp 9.2 kg/kWp lighter
Power density 248.0 Wp/m² 239.7 Wp/m² 8.3 Wp/m² higher
Open-circuit voltage 54.30 V 58.72 V 4.42 V apart
Module area 2.701 m² 3.212 m² 0.511 m² apart
Cell technology N-type Back Contact N-type vs Back Contact
Short-circuit current 15.60 A 16.64 A 1.04 A apart
Cell count 144 156 12 cells apart
Voltage at max power 44.96 V 48.77 V 3.81 V apart
Bifacial No Yes No vs Yes
Dimensions 2382x1134x30 mm 2465x1303x33 mm 2382x1134x30 mm vs 2465x1303x33 mm
Current at max power 14.91 A 15.79 A 0.88 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.
LR7-72HVHF-670M
22,480 kWh
AIKO-A770-GRH78Dw
25,835 kWh
Lifetime gap
3,355 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario LR7-72HVHF-670M AIKO-A770-GRH78Dw
Standard test conditions 25 °C 100.0% of rated power 670 W 770 W
Cool, bright day 40 °C 96.1% of rated power 644 W 740 W
Typical summer roof 55 °C 92.2% of rated power 618 W 710 W
Hot roof 70 °C 88.3% of rated power 592 W 680 W
03

Full specification

Parameter LR7-72HVHF-670M AIKO-A770-GRH78Dw Difference
Power and efficiency
Rated power 670 Wp 770 Wp +100 W for AIKO-A770-GRH78Dw
Module efficiency 24.80 % 24.00 % +0.80 pp for LR7-72HVHF-670M
Power density 248.0 Wp/m² 239.7 Wp/m² +8.3 Wp/m² for LR7-72HVHF-670M
Open-circuit voltage 54.30 V 58.72 V 4.42 V apart
Voltage at max power 44.96 V 48.77 V 3.81 V apart
Short-circuit current 15.60 A 16.64 A 1.04 A apart
Current at max power 14.91 A 15.79 A 0.88 A apart
Temperature
Temperature coefficient -0.260 %/°C -0.260 %/°C Same
Mechanical
Dimensions 2382x1134x30 mm 2465x1303x33 mm 2382x1134x30 mm vs 2465x1303x33 mm
Module area 2.701 m² 3.212 m² 0.511 m² apart
Weight 28.5 kg 39.8 kg -11.3 kg for LR7-72HVHF-670M
Weight per kWp 42.5 kg/kWp 51.7 kg/kWp -9.2 kg/kWp for LR7-72HVHF-670M
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 N-type Back Contact N-type vs Back Contact
Cell type Monocrystalline Monocrystalline Same
Cell count 144 156 12 cells apart
Bifacial No Yes No vs Yes
04

Against the whole database

14,005 panels
Efficiency
#12 vs #303
LR7-72HVHF-670M leads by 291 places
Power density
#14 vs #347
LR7-72HVHF-670M leads by 333 places
Heat behaviour
#511 vs #511
Tied - the same position in the database
Weight
#226 vs #5,072
LR7-72HVHF-670M leads by 4,846 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#284 vs #40
AIKO-A770-GRH78Dw leads by 244 places
05

More useful comparisons

Open the full database
Same series, other bin
Longi Solar LR7-72HVHF-670M vs Longi Solar LR7-72HVHF-665M
One difference: module efficiency
Same series, other bin
Longi Solar LR7-72HVHF-670M vs Longi Solar LR7-72HVHF-660M
3 differences, the largest is module efficiency
Same series, other bin
Longi Solar LR7-72HVHF-670M vs Longi Solar LR7-72HVHF-655M
3 differences, the largest is module efficiency
Same series, other bin
Longi Solar LR7-72HVHF-670M vs Longi Solar LR7-72HVHF-650M
3 differences, the largest is module efficiency
Same series, other bin
Longi Solar LR7-72HVHF-670M vs Longi Solar LR7-72HVHF-645M
3 differences, the largest is module efficiency
Same series, other bin
Longi Solar LR7-72HVHF-670M vs Longi Solar LR7-72HVHF-640M
3 differences, the largest is module efficiency
06

Written summary

07

Questions about this pairing

Which panel is better: Longi Solar LR7-72HVHF-670M or AIKO AIKO-A770-GRH78Dw?
According to our database: Longi Solar LR7-72HVHF-670M has higher module efficiency (24.80% vs 24.00%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Longi Solar LR7-72HVHF-670M and AIKO AIKO-A770-GRH78Dw?
Longi Solar LR7-72HVHF-670M has a module efficiency of 24.80%, while AIKO AIKO-A770-GRH78Dw is 24.00%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Longi Solar LR7-72HVHF-670M use vs AIKO AIKO-A770-GRH78Dw?
Longi Solar LR7-72HVHF-670M uses N-type cells; AIKO AIKO-A770-GRH78Dw uses Back Contact. 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 Longi Solar LR7-72HVHF-670M and AIKO AIKO-A770-GRH78Dw?
Longi Solar LR7-72HVHF-670M has a 30 years power warranty; AIKO AIKO-A770-GRH78Dw 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 Longi Solar LR7-72HVHF-670M and AIKO AIKO-A770-GRH78Dw bifacial panels?
AIKO AIKO-A770-GRH78Dw is bifacial (captures light from both faces); Longi Solar LR7-72HVHF-670M is monofacial. Bifacial panels work best on ground mounts or raised structures with a light-coloured surface underneath.
Compare Longi Solar and AIKO as manufacturers Portfolio, efficiency, cell technologies and warranty terms

Shop prices: See 174 Longi Solar offers · See 179 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.