RCM-730-8DBNM vs GK-4-78HGBD-780M 4 of 19 identical Swap Change panels

Recom RCM-730-8DBNM vs Gokin GK-4-78HGBD-780M

Q: Which panel is better: Recom RCM-730-8DBNM or Gokin GK-4-78HGBD-780M?

According to our database: Gokin GK-4-78HGBD-780M has higher module efficiency (24.30% vs 23.50%); 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 Recom RCM-730-8DBNM and Gokin GK-4-78HGBD-780M?

Recom RCM-730-8DBNM has a module efficiency of 23.50%, while Gokin GK-4-78HGBD-780M is 24.30%. Higher efficiency means more electricity from the same roof area - useful when space is limited.

Q: What cell technology does Recom RCM-730-8DBNM use vs Gokin GK-4-78HGBD-780M?

Recom RCM-730-8DBNM uses TOPCon cells; Gokin GK-4-78HGBD-780M uses Back Contact. 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 Recom RCM-730-8DBNM and Gokin GK-4-78HGBD-780M?

Recom RCM-730-8DBNM has a 30 years power warranty; Gokin GK-4-78HGBD-780M 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 Recom RCM-730-8DBNM and Gokin GK-4-78HGBD-780M bifacial panels?

Both Recom RCM-730-8DBNM and Gokin GK-4-78HGBD-780M 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.

Recom

RCM-730-8DBNM

730 Wp 23.50 % TOPCon Bifacial

Open panel page Datasheet PDF

Gokin

GK-4-78HGBD-780M

780 Wp 24.30 % Back Contact Bifacial

Open panel page Datasheet PDF

The verdict

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

The largest is module efficiency: 0.80 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 RCM-730-8DBNM GK-4-78HGBD-780M Difference

Module efficiency 23.50 % 24.30 % 0.80 pp more efficient

Rated power 730 Wp 780 Wp 50 W more power

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

Product warranty 30 yrs 15 yrs 15 yrs longer

Power density 235.0 Wp/m² 242.8 Wp/m² 7.8 Wp/m² higher

Open-circuit voltage 49.59 V 58.92 V 9.33 V apart

Module area 3.106 m² 3.212 m² 0.106 m² apart

Short-circuit current 18.64 A 16.78 A 1.86 A apart

Cell technology TOPCon Back Contact TOPCon vs Back Contact

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

Voltage at max power 41.44 V 48.97 V 7.53 V apart

Cell count 132 156 24 cells apart

Current at max power 17.62 A 15.93 A 1.69 A apart

Weight per kWp 51.8 kg/kWp 49.6 kg/kWp 2.2 kg/kWp lighter

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

RCM-730-8DBNM

24,493 kWh

GK-4-78HGBD-780M

26,374 kWh

Lifetime gap

1,881 kWh

Output when it is hot

Rated power carried across the range a module actually sees

Scenario RCM-730-8DBNM GK-4-78HGBD-780M

Standard test conditions 25 °C 100.0% of rated power 730 W 780 W

Cool, bright day 40 °C 95.7% of rated power 698 W 750 W

Typical summer roof 55 °C 91.3% of rated power 666 W 719 W

Hot roof 70 °C 87.0% of rated power 635 W 689 W

Full specification

Parameter RCM-730-8DBNM GK-4-78HGBD-780M Difference

Power and efficiency

Rated power 730 Wp 780 Wp +50 W for GK-4-78HGBD-780M

Module efficiency 23.50 % 24.30 % +0.80 pp for GK-4-78HGBD-780M

Power density 235.0 Wp/m² 242.8 Wp/m² +7.8 Wp/m² for GK-4-78HGBD-780M

Open-circuit voltage 49.59 V 58.92 V 9.33 V apart

Voltage at max power 41.44 V 48.97 V 7.53 V apart

Short-circuit current 18.64 A 16.78 A 1.86 A apart

Current at max power 17.62 A 15.93 A 1.69 A apart

Temperature

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

Mechanical

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

Module area 3.106 m² 3.212 m² 0.106 m² apart

Weight 37.8 kg 38.7 kg Effectively the same

Weight per kWp 51.8 kg/kWp 49.6 kg/kWp -2.2 kg/kWp for GK-4-78HGBD-780M

Warranty and degradation

Product warranty 30 yrs 15 yrs +15 yrs for RCM-730-8DBNM

Performance warranty 30 yrs 30 yrs Same

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

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

Against the whole database

14,005 panels

Efficiency

#716 vs #131

GK-4-78HGBD-780M leads by 585 places

Power density

#800 vs #138

GK-4-78HGBD-780M leads by 662 places

Heat behaviour

#2,165 vs #511

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

Weight

#5,151 vs #3,161

GK-4-78HGBD-780M leads by 1,990 places

Warranty

#21 vs #21

Tied - the same position in the database

Overall

#8 vs #15

RCM-730-8DBNM leads by 7 places

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Written summary

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Questions about this pairing

Which panel is better: Recom RCM-730-8DBNM or Gokin GK-4-78HGBD-780M?

According to our database: Gokin GK-4-78HGBD-780M has higher module efficiency (24.30% vs 23.50%); 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 Recom RCM-730-8DBNM and Gokin GK-4-78HGBD-780M?

Recom RCM-730-8DBNM has a module efficiency of 23.50%, while Gokin GK-4-78HGBD-780M is 24.30%. Higher efficiency means more electricity from the same roof area - useful when space is limited.

What cell technology does Recom RCM-730-8DBNM use vs Gokin GK-4-78HGBD-780M?

Recom RCM-730-8DBNM uses TOPCon cells; Gokin GK-4-78HGBD-780M 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 Recom RCM-730-8DBNM and Gokin GK-4-78HGBD-780M?

Recom RCM-730-8DBNM has a 30 years power warranty; Gokin GK-4-78HGBD-780M 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 Recom RCM-730-8DBNM and Gokin GK-4-78HGBD-780M bifacial panels?

Both Recom RCM-730-8DBNM and Gokin GK-4-78HGBD-780M 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 Recom 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.