GK-4-78HGBD-775M vs MS720N-HJTGB 5 of 19 identical Swap Change panels

Gokin GK-4-78HGBD-775M vs Mysolar USA MS720N-HJTGB

Q: Which panel is better: Gokin GK-4-78HGBD-775M or Mysolar USA MS720N-HJTGB?

According to our database: Gokin GK-4-78HGBD-775M has higher module efficiency (24.10% vs 23.17%). See the full spec comparison and 30-year energy simulation above for a complete picture.

Q: What is the efficiency of Gokin GK-4-78HGBD-775M and Mysolar USA MS720N-HJTGB?

Gokin GK-4-78HGBD-775M has a module efficiency of 24.10%, while Mysolar USA MS720N-HJTGB is 23.17%. Higher efficiency means more electricity from the same roof area - useful when space is limited.

Q: What cell technology does Gokin GK-4-78HGBD-775M use vs Mysolar USA MS720N-HJTGB?

Gokin GK-4-78HGBD-775M uses Back Contact cells; Mysolar USA MS720N-HJTGB uses HJT. Modern n-type technologies (TOPCon, HJT, BC) typically deliver higher efficiency and lower degradation compared to older PERC (p-type) cells.

Q: What is the warranty on Gokin GK-4-78HGBD-775M and Mysolar USA MS720N-HJTGB?

Gokin GK-4-78HGBD-775M has a 30 years power warranty; Mysolar USA MS720N-HJTGB 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.

Q: Are Gokin GK-4-78HGBD-775M and Mysolar USA MS720N-HJTGB bifacial panels?

Both Gokin GK-4-78HGBD-775M and Mysolar USA MS720N-HJTGB 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.

Gokin

GK-4-78HGBD-775M

775 Wp 24.10 % Back Contact Bifacial

Open panel page Datasheet PDF

Mysolar USA

MS720N-HJTGB

720 Wp 23.17 % HJT Bifacial

Open panel page Datasheet PDF

The verdict

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

The largest is module efficiency: 0.93 pp more efficient. 5 of 19 comparable parameters are identical.

See all 14 differences

How alike are they

5 of 19 comparable
parameters are identical

identical differs

What actually differs

14 of 19 parameters

Parameter GK-4-78HGBD-775M MS720N-HJTGB Difference

Module efficiency 24.10 % 23.17 % 0.93 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

Open-circuit voltage 58.82 V 50.75 V 8.07 V apart

Module area 3.212 m² 3.106 m² 0.106 m² apart

Annual degradation 0.35 %/yr 0.25 %/yr 0.10 %/yr slower

Weight per kWp 49.9 kg/kWp 53.9 kg/kWp 4.0 kg/kWp lighter

Cell technology Back Contact HJT Back Contact vs HJT

Voltage at max power 48.87 V 42.70 V 6.17 V apart

Cell count 156 132 24 cells apart

Short-circuit current 16.71 A 17.67 A 0.96 A apart

Current at max power 15.86 A 16.87 A 1.01 A apart

Dimensions 2465x1303x33 mm 2384x1303x35 mm 2465x1303x33 mm vs 2384x1303x35 mm

What it means on a roof

Thirty years of production

Declared annual degradation, with a 1.0% first-year loss assumed for both panels because at least one datasheet omits it, at 1,200 kWh/kWp a year

Cell temperature

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.

GK-4-78HGBD-775M

26,205 kWh

MS720N-HJTGB

24,721 kWh

Lifetime gap

1,484 kWh

Output when it is hot

Rated power carried across the range a module actually sees

Scenario GK-4-78HGBD-775M MS720N-HJTGB

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 692 W

Typical summer roof 55 °C 92.2% of rated power 715 W 664 W

Hot roof 70 °C 88.3% of rated power 684 W 636 W

Full specification

Parameter GK-4-78HGBD-775M MS720N-HJTGB Difference

Power and efficiency

Rated power 775 Wp 720 Wp +55 W for GK-4-78HGBD-775M

Module efficiency 24.10 % 23.17 % +0.93 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 50.75 V 8.07 V apart

Voltage at max power 48.87 V 42.70 V 6.17 V apart

Short-circuit current 16.71 A 17.67 A 0.96 A apart

Current at max power 15.86 A 16.87 A 1.01 A apart

Temperature

Temperature coefficient -0.260 %/°C -0.260 %/°C Same

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 38.8 kg Effectively the same

Weight per kWp 49.9 kg/kWp 53.9 kg/kWp -4.0 kg/kWp for GK-4-78HGBD-775M

Warranty and degradation

Product warranty 15 yrs 30 yrs +15 yrs for MS720N-HJTGB

Performance warranty 30 yrs 30 yrs Same

Annual degradation 0.35 %/yr 0.25 %/yr -0.10 %/yr for MS720N-HJTGB

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

Against the whole database

14,005 panels

Efficiency

#219 vs #1,473

GK-4-78HGBD-775M leads by 1,254 places

Power density

#227 vs #1,347

GK-4-78HGBD-775M leads by 1,120 places

Heat behaviour

#511 vs #511

Tied - the same position in the database

Weight

#3,297 vs #8,017

GK-4-78HGBD-775M leads by 4,720 places

Warranty

#21 vs #21

Tied - the same position in the database

Overall

#29 vs #27

MS720N-HJTGB leads by 2 places

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Written summary

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Questions about this pairing

Which panel is better: Gokin GK-4-78HGBD-775M or Mysolar USA MS720N-HJTGB?

According to our database: Gokin GK-4-78HGBD-775M has higher module efficiency (24.10% vs 23.17%). 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 Mysolar USA MS720N-HJTGB?

Gokin GK-4-78HGBD-775M has a module efficiency of 24.10%, while Mysolar USA MS720N-HJTGB is 23.17%. 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 Mysolar USA MS720N-HJTGB?

Gokin GK-4-78HGBD-775M uses Back Contact cells; Mysolar USA MS720N-HJTGB 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 Mysolar USA MS720N-HJTGB?

Gokin GK-4-78HGBD-775M has a 30 years power warranty; Mysolar USA MS720N-HJTGB 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 Mysolar USA MS720N-HJTGB bifacial panels?

Both Gokin GK-4-78HGBD-775M and Mysolar USA MS720N-HJTGB 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 Mysolar USA 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.