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4-78HGBD-775M vs 5-60HG-535M 8 of 19 identical Swap Change panels

Gokin GK-4-78HGBD-775M vs Gokin GK-5-60HG-535M

Gokin GK-4-78HGBD-775M
Gokin
GK-4-78HGBD-775M
775 Wp 24.10 % Back Contact Bifacial
Open panel page Datasheet PDF
VS
Gokin
GK-5-60HG-535M
535 Wp 24.10 % Back Contact
Open panel page Datasheet PDF
The verdict

11 differences, and they point both ways

The largest is rated power: 240 W more power. 8 of 19 comparable parameters are identical.

See all 11 differences
How alike are they
8 of 19 comparable
parameters are identical
identical differs
01

What actually differs

11 of 19 parameters
Parameter 4-78HGBD-775M 5-60HG-535M Difference
Rated power 775 Wp 535 Wp 240 W more power
Weight 38.7 kg 23.3 kg 15.4 kg lighter
Weight per kWp 49.9 kg/kWp 43.6 kg/kWp 6.4 kg/kWp lighter
Open-circuit voltage 58.82 V 45.72 V 13.10 V apart
Short-circuit current 16.71 A 14.47 A 2.24 A apart
Module area 3.212 m² 2.216 m² 0.996 m² apart
Voltage at max power 48.87 V 38.60 V 10.27 V apart
Current at max power 15.86 A 13.86 A 2.00 A apart
Cell count 156 120 36 cells apart
Bifacial Yes No Yes vs No
Dimensions 2465x1303x33 mm 1954x1134x30 mm 2465x1303x33 mm vs 1954x1134x30 mm
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
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.
4-78HGBD-775M
26,205 kWh
5-60HG-535M
18,090 kWh
Lifetime gap
8,115 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario 4-78HGBD-775M 5-60HG-535M
Standard test conditions 25 °C 100.0% of rated power 775 W 535 W
Cool, bright day 40 °C 96.1% of rated power 745 W 514 W
Typical summer roof 55 °C 92.2% of rated power 715 W 493 W
Hot roof 70 °C 88.3% of rated power 684 W 472 W
03

Full specification

Parameter 4-78HGBD-775M 5-60HG-535M Difference
Power and efficiency
Rated power 775 Wp 535 Wp +240 W for 4-78HGBD-775M
Module efficiency 24.10 % 24.10 % Same
Power density 241.3 Wp/m² 241.4 Wp/m² Effectively the same
Open-circuit voltage 58.82 V 45.72 V 13.10 V apart
Voltage at max power 48.87 V 38.60 V 10.27 V apart
Short-circuit current 16.71 A 14.47 A 2.24 A apart
Current at max power 15.86 A 13.86 A 2.00 A apart
Temperature
Temperature coefficient -0.260 %/°C -0.260 %/°C Same
Mechanical
Dimensions 2465x1303x33 mm 1954x1134x30 mm 2465x1303x33 mm vs 1954x1134x30 mm
Module area 3.212 m² 2.216 m² 0.996 m² apart
Weight 38.7 kg 23.3 kg -15.4 kg for 5-60HG-535M
Weight per kWp 49.9 kg/kWp 43.6 kg/kWp -6.4 kg/kWp for 5-60HG-535M
Warranty and degradation
Product warranty 15 yrs 15 yrs Same
Performance warranty 30 yrs 30 yrs Same
Annual degradation 0.35 %/yr 0.35 %/yr Same
Technology
Cell technology Back Contact Back Contact Same
Cell type Monocrystalline Monocrystalline Same
Cell count 156 120 36 cells apart
Bifacial Yes No Yes vs No
04

Against the whole database

14,005 panels
Efficiency
#219 vs #219
Tied - the same position in the database
Power density
#227 vs #218
5-60HG-535M leads by 9 places
Heat behaviour
#511 vs #511
Tied - the same position in the database
Weight
#3,297 vs #309
5-60HG-535M leads by 2,988 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#29 vs #3,377
4-78HGBD-775M leads by 3,348 places
05

More useful comparisons

Open the full database
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Gokin GK-4-78HGBD-775M vs Gokin GK-4-78HGBD-760M
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Gokin GK-5-60HG-535M vs Gokin GK-5-60HG-540M
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Gokin GK-5-60HG-535M vs Gokin GK-5-60HG-530M
One difference: module efficiency
06

Written summary

07

Questions about this pairing

Which panel is better: Gokin GK-4-78HGBD-775M or Gokin GK-5-60HG-535M?
According to our database: both panels are closely matched on key specs - the decision often comes down to price and local availability. 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 Gokin GK-5-60HG-535M?
Gokin GK-4-78HGBD-775M has a module efficiency of 24.10%, while Gokin GK-5-60HG-535M is 24.10%. 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 Gokin GK-5-60HG-535M?
Gokin GK-4-78HGBD-775M uses Back Contact cells; Gokin GK-5-60HG-535M 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 Gokin GK-4-78HGBD-775M and Gokin GK-5-60HG-535M?
Gokin GK-4-78HGBD-775M has a 30 years power warranty; Gokin GK-5-60HG-535M 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 Gokin GK-5-60HG-535M bifacial panels?
Gokin GK-4-78HGBD-775M is bifacial (captures light from both faces); Gokin GK-5-60HG-535M is monofacial. Bifacial panels work best on ground mounts or raised structures with a light-coloured surface underneath.

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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.