GK-4-78HGBD-780M vs RCM-720-8DBNM 4 of 19 identical Swap Change panels

Gokin GK-4-78HGBD-780M vs Recom RCM-720-8DBNM

Q: Which panel is better: Gokin GK-4-78HGBD-780M or Recom RCM-720-8DBNM?

According to our database: Gokin GK-4-78HGBD-780M has higher module efficiency (24.30% vs 23.20%); Gokin GK-4-78HGBD-780M tolerates heat better (temp coeff -0.260%/°C vs -0.290%/°C). 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-780M and Recom RCM-720-8DBNM?

Gokin GK-4-78HGBD-780M has a module efficiency of 24.30%, while Recom RCM-720-8DBNM is 23.20%. Higher efficiency means more electricity from the same roof area - useful when space is limited.

Q: What cell technology does Gokin GK-4-78HGBD-780M use vs Recom RCM-720-8DBNM?

Gokin GK-4-78HGBD-780M uses Back Contact cells; Recom RCM-720-8DBNM uses TOPCon. 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-780M and Recom RCM-720-8DBNM?

Gokin GK-4-78HGBD-780M has a 30 years power warranty; Recom RCM-720-8DBNM 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-780M and Recom RCM-720-8DBNM bifacial panels?

Both Gokin GK-4-78HGBD-780M and Recom RCM-720-8DBNM 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-780M

780 Wp 24.30 % Back Contact Bifacial

Open panel page Datasheet PDF

Recom

RCM-720-8DBNM

720 Wp 23.20 % TOPCon Bifacial

Open panel page Datasheet PDF

The verdict

GK-4-78HGBD-780M leads on the differences that matter

The largest is module efficiency: 1.10 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

What actually differs

15 of 19 parameters

Parameter GK-4-78HGBD-780M RCM-720-8DBNM Difference

Module efficiency 24.30 % 23.20 % 1.10 pp more efficient

Rated power 780 Wp 720 Wp 60 W more power

Temperature coefficient -0.260 %/°C -0.290 %/°C 0.030 %/°C better in heat

Power density 242.8 Wp/m² 231.8 Wp/m² 11.1 Wp/m² higher

Product warranty 15 yrs 30 yrs 15 yrs longer

Open-circuit voltage 58.92 V 49.23 V 9.69 V apart

Module area 3.212 m² 3.106 m² 0.106 m² apart

Short-circuit current 16.78 A 18.54 A 1.76 A apart

Cell technology Back Contact TOPCon Back Contact vs TOPCon

Weight per kWp 49.6 kg/kWp 52.5 kg/kWp 2.9 kg/kWp lighter

Annual degradation 0.35 %/yr 0.40 %/yr 0.05 %/yr slower

Voltage at max power 48.97 V 41.10 V 7.87 V apart

Cell count 156 132 24 cells apart

Current at max power 15.93 A 17.52 A 1.59 A apart

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

What it means on a roof

Thirty years of production

Each panel's own declared degradation curve, at 1,200 kWh/kWp a year

Cell temperature

GK-4-78HGBD-780M

26,374 kWh

RCM-720-8DBNM

24,157 kWh

Lifetime gap

2,217 kWh

Output when it is hot

Rated power carried across the range a module actually sees

Scenario GK-4-78HGBD-780M RCM-720-8DBNM

Standard test conditions 25 °C 100.0% of rated power 780 W 720 W

Cool, bright day 40 °C 95.7% of rated power 750 W 689 W

Typical summer roof 55 °C 91.3% of rated power 719 W 657 W

Hot roof 70 °C 87.0% of rated power 689 W 626 W

Full specification

Parameter GK-4-78HGBD-780M RCM-720-8DBNM Difference

Power and efficiency

Rated power 780 Wp 720 Wp +60 W for GK-4-78HGBD-780M

Module efficiency 24.30 % 23.20 % +1.10 pp for GK-4-78HGBD-780M

Power density 242.8 Wp/m² 231.8 Wp/m² +11.1 Wp/m² for GK-4-78HGBD-780M

Open-circuit voltage 58.92 V 49.23 V 9.69 V apart

Voltage at max power 48.97 V 41.10 V 7.87 V apart

Short-circuit current 16.78 A 18.54 A 1.76 A apart

Current at max power 15.93 A 17.52 A 1.59 A apart

Temperature

Temperature coefficient -0.260 %/°C -0.290 %/°C +0.030 %/°C for GK-4-78HGBD-780M

Mechanical

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

Module area 3.212 m² 3.106 m² 0.106 m² apart

Weight 38.7 kg 37.8 kg Effectively the same

Weight per kWp 49.6 kg/kWp 52.5 kg/kWp -2.9 kg/kWp for GK-4-78HGBD-780M

Warranty and degradation

Product warranty 15 yrs 30 yrs +15 yrs for RCM-720-8DBNM

Performance warranty 30 yrs 30 yrs Same

Annual degradation 0.35 %/yr 0.40 %/yr -0.05 %/yr for GK-4-78HGBD-780M

Technology

Cell technology Back Contact TOPCon Back Contact vs TOPCon

Cell type Monocrystalline Monocrystalline Same

Cell count 156 132 24 cells apart

Bifacial Yes Yes Same

Against the whole database

14,005 panels

Efficiency

#131 vs #1,306

GK-4-78HGBD-780M leads by 1,175 places

Power density

#138 vs #1,347

GK-4-78HGBD-780M leads by 1,209 places

Heat behaviour

#511 vs #2,165

GK-4-78HGBD-780M leads by 1,654 places

Weight

#3,161 vs #6,043

GK-4-78HGBD-780M leads by 2,882 places

Warranty

#21 vs #21

Tied - the same position in the database

Overall

#15 vs #23

GK-4-78HGBD-780M leads by 8 places

More useful comparisons

Open the full database

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Gokin

Gokin GK-4-78HGBD-780M vs Gokin GK-4-78HGBD-775M

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Gokin

Gokin GK-4-78HGBD-780M vs Gokin GK-4-78HGBD-770M

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Gokin GK-4-78HGBD-780M vs Gokin GK-4-78HGBD-765M

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Gokin GK-4-78HGBD-780M vs Gokin GK-4-78HGBD-760M

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Recom

Recom RCM-720-8DBNM vs Recom RCM-730-8DBNM

3 differences, the largest is module efficiency

Same series, other bin

Recom

Recom RCM-720-8DBNM vs Recom RCM-725-8DBNM

The same specification on paper

Written summary

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Questions about this pairing

Which panel is better: Gokin GK-4-78HGBD-780M or Recom RCM-720-8DBNM?

According to our database: Gokin GK-4-78HGBD-780M has higher module efficiency (24.30% vs 23.20%); Gokin GK-4-78HGBD-780M tolerates heat better (temp coeff -0.260%/°C vs -0.290%/°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-780M and Recom RCM-720-8DBNM?

Gokin GK-4-78HGBD-780M has a module efficiency of 24.30%, while Recom RCM-720-8DBNM is 23.20%. Higher efficiency means more electricity from the same roof area - useful when space is limited.

What cell technology does Gokin GK-4-78HGBD-780M use vs Recom RCM-720-8DBNM?

Gokin GK-4-78HGBD-780M uses Back Contact cells; Recom RCM-720-8DBNM uses TOPCon. 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-780M and Recom RCM-720-8DBNM?

Gokin GK-4-78HGBD-780M has a 30 years power warranty; Recom RCM-720-8DBNM 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-780M and Recom RCM-720-8DBNM bifacial panels?

Both Gokin GK-4-78HGBD-780M and Recom RCM-720-8DBNM 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 Recom 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.