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GK-4-78HGBD-775M vs LX-720M/210-132+ GG 4 of 19 identical Swap Change panels

Gokin GK-4-78HGBD-775M vs Luxor Solar LX-720M/210-132+ GG

Gokin GK-4-78HGBD-775M
Gokin
GK-4-78HGBD-775M
775 Wp 24.10 % Back Contact Bifacial
Open panel page Datasheet PDF
VS
Luxor Solar
LX-720M/210-132+ GG
720 Wp 23.39 % HJT Bifacial
Open panel page Datasheet PDF
The verdict

GK-4-78HGBD-775M leads on the differences that matter

The largest is module efficiency: 0.71 pp more efficient. 4 of 19 comparable parameters are identical.

See all 15 differences
How alike are they
4 of 19 comparable
parameters are identical
identical differs
01

What actually differs

15 of 19 parameters
Parameter GK-4-78HGBD-775M LX-720M/210-132+ GG Difference
Module efficiency 24.10 % 23.39 % 0.71 pp more efficient
Rated power 775 Wp 720 Wp 55 W more power
Power density 241.3 Wp/m² 231.8 Wp/m² 9.5 Wp/m² higher
Product warranty 15 yrs 30 yrs 15 yrs longer
Annual degradation 0.35 %/yr 0.21 %/yr 0.14 %/yr slower
Temperature coefficient -0.260 %/°C -0.240 %/°C 0.020 %/°C better in heat
Open-circuit voltage 58.82 V 51.39 V 7.43 V apart
Module area 3.212 m² 3.106 m² 0.106 m² apart
Weight per kWp 49.9 kg/kWp 53.8 kg/kWp 3.8 kg/kWp lighter
Cell technology Back Contact HJT Back Contact vs HJT
Voltage at max power 48.87 V 43.68 V 5.19 V apart
Cell count 156 132 24 cells apart
Short-circuit current 16.71 A 17.54 A 0.83 A apart
Dimensions 2465x1303x33 mm 2384x1303x35 mm 2465x1303x33 mm vs 2384x1303x35 mm
Current at max power 15.86 A 16.49 A 0.63 A apart
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
GK-4-78HGBD-775M
26,205 kWh
LX-720M/210-132+ GG
24,872 kWh
Lifetime gap
1,333 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario GK-4-78HGBD-775M LX-720M/210-132+ GG
Standard test conditions 25 °C 100.0% of rated power 775 W 720 W
Cool, bright day 40 °C 96.1% of rated power 745 W 694 W
Typical summer roof 55 °C 92.2% of rated power 715 W 668 W
Hot roof 70 °C 88.3% of rated power 684 W 642 W
03

Full specification

Parameter GK-4-78HGBD-775M LX-720M/210-132+ GG Difference
Power and efficiency
Rated power 775 Wp 720 Wp +55 W for GK-4-78HGBD-775M
Module efficiency 24.10 % 23.39 % +0.71 pp for GK-4-78HGBD-775M
Power density 241.3 Wp/m² 231.8 Wp/m² +9.5 Wp/m² for GK-4-78HGBD-775M
Open-circuit voltage 58.82 V 51.39 V 7.43 V apart
Voltage at max power 48.87 V 43.68 V 5.19 V apart
Short-circuit current 16.71 A 17.54 A 0.83 A apart
Current at max power 15.86 A 16.49 A 0.63 A apart
Temperature
Temperature coefficient -0.260 %/°C -0.240 %/°C +0.020 %/°C for LX-720M/210-132+ GG
Mechanical
Dimensions 2465x1303x33 mm 2384x1303x35 mm 2465x1303x33 mm vs 2384x1303x35 mm
Module area 3.212 m² 3.106 m² 0.106 m² apart
Weight 38.7 kg 38.7 kg Same
Weight per kWp 49.9 kg/kWp 53.8 kg/kWp -3.8 kg/kWp for GK-4-78HGBD-775M
Warranty and degradation
Product warranty 15 yrs 30 yrs +15 yrs for LX-720M/210-132+ GG
Performance warranty 30 yrs 30 yrs Same
Annual degradation 0.35 %/yr 0.21 %/yr -0.14 %/yr for LX-720M/210-132+ GG
Technology
Cell technology Back Contact HJT Back Contact vs HJT
Cell type Monocrystalline Monocrystalline Same
Cell count 156 132 24 cells apart
Bifacial Yes Yes Same
04

Against the whole database

14,005 panels
Efficiency
#219 vs #925
GK-4-78HGBD-775M leads by 706 places
Power density
#227 vs #1,347
GK-4-78HGBD-775M leads by 1,120 places
Heat behaviour
#511 vs #13
LX-720M/210-132+ GG leads by 498 places
Weight
#3,297 vs #7,805
GK-4-78HGBD-775M leads by 4,508 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#29 vs #17
LX-720M/210-132+ GG leads by 12 places
05

More useful comparisons

Open the full database
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Gokin
Gokin GK-4-78HGBD-775M vs Gokin GK-4-78HGBD-780M
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Gokin GK-4-78HGBD-775M vs Gokin GK-4-78HGBD-770M
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Gokin GK-4-78HGBD-775M vs Gokin GK-4-78HGBD-765M
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Gokin GK-4-78HGBD-775M vs Gokin GK-4-78HGBD-760M
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Luxor Solar
Luxor Solar LX-720M/210-132+ GG vs Luxor Solar LX-720M/210-132+GG
The same specification on paper
Same series, other bin
Luxor Solar
Luxor Solar LX-720M/210-132+ GG vs Luxor Solar LX-715M/210-132+GG
The same specification on paper
06

Written summary

07

Questions about this pairing

Which panel is better: Gokin GK-4-78HGBD-775M or Luxor Solar LX-720M/210-132+ GG?
According to our database: Gokin GK-4-78HGBD-775M has higher module efficiency (24.10% vs 23.39%); Luxor Solar LX-720M/210-132+ GG tolerates heat better (temp coeff -0.240%/°C vs -0.260%/°C). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Gokin GK-4-78HGBD-775M and Luxor Solar LX-720M/210-132+ GG?
Gokin GK-4-78HGBD-775M has a module efficiency of 24.10%, while Luxor Solar LX-720M/210-132+ GG is 23.39%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Gokin GK-4-78HGBD-775M use vs Luxor Solar LX-720M/210-132+ GG?
Gokin GK-4-78HGBD-775M uses Back Contact cells; Luxor Solar LX-720M/210-132+ GG uses HJT. 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 Gokin GK-4-78HGBD-775M and Luxor Solar LX-720M/210-132+ GG?
Gokin GK-4-78HGBD-775M has a 30 years power warranty; Luxor Solar LX-720M/210-132+ GG 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 Gokin GK-4-78HGBD-775M and Luxor Solar LX-720M/210-132+ GG bifacial panels?
Both Gokin GK-4-78HGBD-775M and Luxor Solar LX-720M/210-132+ GG 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 Gokin and Luxor 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.