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5-60HG-540M vs 4-78HGBD-765M 6 of 19 identical Swap Change panels

Gokin GK-5-60HG-540M vs Gokin GK-4-78HGBD-765M

Gokin
GK-5-60HG-540M
540 Wp 24.40 % Back Contact
Open panel page Datasheet PDF
VS
Gokin GK-4-78HGBD-765M
Gokin
GK-4-78HGBD-765M
765 Wp 23.80 % Back Contact Bifacial
Open panel page Datasheet PDF
The verdict

5-60HG-540M leads on the differences that matter

The largest is rated power: 225 W more power. 6 of 19 comparable parameters are identical.

See all 13 differences
How alike are they
6 of 19 comparable
parameters are identical
identical differs
01

What actually differs

13 of 19 parameters
Parameter 5-60HG-540M 4-78HGBD-765M Difference
Rated power 540 Wp 765 Wp 225 W more power
Module efficiency 24.40 % 23.80 % 0.60 pp more efficient
Weight 23.3 kg 38.7 kg 15.4 kg lighter
Weight per kWp 43.1 kg/kWp 50.6 kg/kWp 7.4 kg/kWp lighter
Open-circuit voltage 45.82 V 58.62 V 12.80 V apart
Short-circuit current 14.53 A 16.57 A 2.04 A apart
Module area 2.216 m² 3.212 m² 0.996 m² apart
Power density 243.7 Wp/m² 238.2 Wp/m² 5.5 Wp/m² higher
Voltage at max power 38.70 V 48.67 V 9.97 V apart
Cell count 120 156 36 cells apart
Current at max power 13.95 A 15.72 A 1.77 A apart
Bifacial No Yes No vs Yes
Dimensions 1954x1134x30 mm 2465x1303x33 mm 1954x1134x30 mm vs 2465x1303x33 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.
5-60HG-540M
18,259 kWh
4-78HGBD-765M
25,867 kWh
Lifetime gap
7,608 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario 5-60HG-540M 4-78HGBD-765M
Standard test conditions 25 °C 100.0% of rated power 540 W 765 W
Cool, bright day 40 °C 96.1% of rated power 519 W 735 W
Typical summer roof 55 °C 92.2% of rated power 498 W 705 W
Hot roof 70 °C 88.3% of rated power 477 W 675 W
03

Full specification

Parameter 5-60HG-540M 4-78HGBD-765M Difference
Power and efficiency
Rated power 540 Wp 765 Wp +225 W for 4-78HGBD-765M
Module efficiency 24.40 % 23.80 % +0.60 pp for 5-60HG-540M
Power density 243.7 Wp/m² 238.2 Wp/m² +5.5 Wp/m² for 5-60HG-540M
Open-circuit voltage 45.82 V 58.62 V 12.80 V apart
Voltage at max power 38.70 V 48.67 V 9.97 V apart
Short-circuit current 14.53 A 16.57 A 2.04 A apart
Current at max power 13.95 A 15.72 A 1.77 A apart
Temperature
Temperature coefficient -0.260 %/°C -0.260 %/°C Same
Mechanical
Dimensions 1954x1134x30 mm 2465x1303x33 mm 1954x1134x30 mm vs 2465x1303x33 mm
Module area 2.216 m² 3.212 m² 0.996 m² apart
Weight 23.3 kg 38.7 kg -15.4 kg for 5-60HG-540M
Weight per kWp 43.1 kg/kWp 50.6 kg/kWp -7.4 kg/kWp for 5-60HG-540M
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 120 156 36 cells apart
Bifacial No Yes No vs Yes
04

Against the whole database

14,005 panels
Efficiency
#99 vs #433
5-60HG-540M leads by 334 places
Power density
#130 vs #452
5-60HG-540M leads by 322 places
Heat behaviour
#511 vs #511
Tied - the same position in the database
Weight
#267 vs #4,013
5-60HG-540M leads by 3,746 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#2,863 vs #67
4-78HGBD-765M leads by 2,796 places
05

More useful comparisons

Open the full database
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Gokin GK-5-60HG-540M vs Gokin GK-5-60HG-535M
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Gokin GK-5-60HG-540M vs Gokin GK-5-60HG-530M
3 differences, the largest is module efficiency
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Gokin GK-5-60HG-540M vs Gokin GK-5-60HG-525M
3 differences, the largest is module efficiency
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Gokin GK-5-60HG-540M vs Gokin GK-5-60HG-520M
3 differences, the largest is module efficiency
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Gokin GK-5-60HG-540M vs Gokin GK-5-60HG-515M
4 differences, the largest is module efficiency
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Gokin GK-5-60HG-540M vs Gokin GK-5-60HG-510M
5 differences, the largest is module efficiency
06

Written summary

07

Questions about this pairing

Which panel is better: Gokin GK-5-60HG-540M or Gokin GK-4-78HGBD-765M?
According to our database: Gokin GK-5-60HG-540M has higher module efficiency (24.40% vs 23.80%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Gokin GK-5-60HG-540M and Gokin GK-4-78HGBD-765M?
Gokin GK-5-60HG-540M has a module efficiency of 24.40%, while Gokin GK-4-78HGBD-765M is 23.80%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Gokin GK-5-60HG-540M use vs Gokin GK-4-78HGBD-765M?
Gokin GK-5-60HG-540M uses Back Contact cells; Gokin GK-4-78HGBD-765M 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-5-60HG-540M and Gokin GK-4-78HGBD-765M?
Gokin GK-5-60HG-540M has a 30 years power warranty; Gokin GK-4-78HGBD-765M 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-5-60HG-540M and Gokin GK-4-78HGBD-765M bifacial panels?
Gokin GK-4-78HGBD-765M is bifacial (captures light from both faces); Gokin GK-5-60HG-540M 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.