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YH720W-33MHD/MH vs GK-4-78HGBD-775M 4 of 18 identical Swap Change panels

IBC Solar YH720W-33MHD/MH vs Gokin GK-4-78HGBD-775M

IBC Solar
YH720W-33MHD/MH
720 Wp 23.18 % TOPCon Bifacial Incomplete
Open panel page Datasheet PDF
VS
Gokin GK-4-78HGBD-775M
Gokin
GK-4-78HGBD-775M
775 Wp 24.10 % Back Contact Bifacial
Open panel page Datasheet PDF
The verdict

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

The largest is module efficiency: 0.92 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 YH720W-33MHD/MH GK-4-78HGBD-775M Difference
Module efficiency 23.18 % 24.10 % 0.92 pp more efficient
Temperature coefficient -0.350 %/°C -0.260 %/°C 0.090 %/°C better in heat
Rated power 720 Wp 775 Wp 55 W more power
Power density 231.8 Wp/m² 241.3 Wp/m² 9.5 Wp/m² higher
Product warranty 30 yrs 15 yrs 15 yrs longer
Open-circuit voltage 49.82 V 58.82 V 9.00 V apart
Module area 3.106 m² 3.212 m² 0.106 m² apart
Short-circuit current 18.13 A 16.71 A 1.42 A apart
Cell technology TOPCon Back Contact TOPCon vs Back Contact
Weight per kWp 52.8 kg/kWp 49.9 kg/kWp 2.8 kg/kWp lighter
Voltage at max power 41.52 V 48.87 V 7.35 V apart
Cell count 132 156 24 cells apart
Current at max power 17.34 A 15.86 A 1.48 A apart
Dimensions 2384x1303x33 mm 2465x1303x33 mm 2384x1303x33 mm vs 2465x1303x33 mm
02

What it means on a roof

Thirty years of production
Declared first-year losses, with 0.40% a year afterwards assumed for both panels, at 1,200 kWh/kWp a year
YH720W-33MHD/MH
24,157 kWh
GK-4-78HGBD-775M
26,003 kWh
Lifetime gap
1,846 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario YH720W-33MHD/MH GK-4-78HGBD-775M
Standard test conditions 25 °C 100.0% of rated power 720 W 775 W
Cool, bright day 40 °C 94.8% of rated power 682 W 745 W
Typical summer roof 55 °C 89.5% of rated power 644 W 715 W
Hot roof 70 °C 84.2% of rated power 607 W 684 W
03

Full specification

Parameter YH720W-33MHD/MH GK-4-78HGBD-775M Difference
Power and efficiency
Rated power 720 Wp 775 Wp +55 W for GK-4-78HGBD-775M
Module efficiency 23.18 % 24.10 % +0.92 pp for GK-4-78HGBD-775M
Power density 231.8 Wp/m² 241.3 Wp/m² +9.5 Wp/m² for GK-4-78HGBD-775M
Open-circuit voltage 49.82 V 58.82 V 9.00 V apart
Voltage at max power 41.52 V 48.87 V 7.35 V apart
Short-circuit current 18.13 A 16.71 A 1.42 A apart
Current at max power 17.34 A 15.86 A 1.48 A apart
Temperature
Temperature coefficient -0.350 %/°C -0.260 %/°C +0.090 %/°C for GK-4-78HGBD-775M
Mechanical
Dimensions 2384x1303x33 mm 2465x1303x33 mm 2384x1303x33 mm vs 2465x1303x33 mm
Module area 3.106 m² 3.212 m² 0.106 m² apart
Weight 38.0 kg 38.7 kg Effectively the same
Weight per kWp 52.8 kg/kWp 49.9 kg/kWp -2.8 kg/kWp for GK-4-78HGBD-775M
Warranty and degradation
Product warranty 30 yrs 15 yrs +15 yrs for YH720W-33MHD/MH
Performance warranty 30 yrs 30 yrs Same
Annual degradation - 0.35 %/yr Not published by IBC Solar
Technology
Cell technology TOPCon Back Contact TOPCon vs Back Contact
Cell type Monocrystalline Monocrystalline Same
Cell count 132 156 24 cells apart
Bifacial Yes Yes Same
04

Against the whole database

14,005 panels
Efficiency
#1,424 vs #219
GK-4-78HGBD-775M leads by 1,205 places
Power density
#1,347 vs #227
GK-4-78HGBD-775M leads by 1,120 places
Heat behaviour
#10,419 vs #511
GK-4-78HGBD-775M leads by 9,908 places
Weight
#6,459 vs #3,297
GK-4-78HGBD-775M leads by 3,162 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#24 vs #29
YH720W-33MHD/MH leads by 5 places
05

More useful comparisons

Open the full database
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IBC Solar
IBC Solar YH720W-33MHD/MH vs IBC Solar YH715W-33MHD/MH
The same specification on paper
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IBC Solar YH720W-33MHD/MH vs IBC Solar YH710W-33MHD/MH
3 differences, the largest is module efficiency
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Gokin
Gokin GK-4-78HGBD-775M vs Gokin GK-4-78HGBD-780M
One difference: module efficiency
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Gokin
Gokin GK-4-78HGBD-775M vs Gokin GK-4-78HGBD-770M
The same specification on paper
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Gokin
Gokin GK-4-78HGBD-775M vs Gokin GK-4-78HGBD-765M
3 differences, the largest is module efficiency
Same series, other bin
Gokin
Gokin GK-4-78HGBD-775M vs Gokin GK-4-78HGBD-760M
3 differences, the largest is module efficiency
06

Written summary

07

Questions about this pairing

Which panel is better: IBC Solar YH720W-33MHD/MH or Gokin GK-4-78HGBD-775M?
According to our database: Gokin GK-4-78HGBD-775M has higher module efficiency (24.10% vs 23.18%); Gokin GK-4-78HGBD-775M tolerates heat better (temp coeff -0.260%/°C vs -0.350%/°C). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of IBC Solar YH720W-33MHD/MH and Gokin GK-4-78HGBD-775M?
IBC Solar YH720 W-33MHD/MH has a module efficiency of 23.18%, while Gokin GK-4-78HGBD-775M is 24.10%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does IBC Solar YH720W-33MHD/MH use vs Gokin GK-4-78HGBD-775M?
IBC Solar YH720 W-33MHD/MH uses TOPCon cells; Gokin GK-4-78HGBD-775M 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 IBC Solar YH720W-33MHD/MH and Gokin GK-4-78HGBD-775M?
IBC Solar YH720 W-33MHD/MH has a 30 years power warranty; Gokin GK-4-78HGBD-775M 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 IBC Solar YH720W-33MHD/MH and Gokin GK-4-78HGBD-775M bifacial panels?
Both IBC Solar YH720 W-33MHD/MH and Gokin GK-4-78HGBD-775M 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 IBC Solar and Gokin 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.