GSD8K66H-740WT vs RCM-720-8DBNM 6 of 19 identical Swap Change panels

Sharp GSD8K66H-740WT vs Recom RCM-720-8DBNM

Q: Which panel is better: Sharp GSD8K66H-740WT or Recom RCM-720-8DBNM?

According to our database: Sharp GSD8K66H-740WT has higher module efficiency (23.82% vs 23.20%); Sharp GSD8K66H-740WT 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 Sharp GSD8K66H-740WT and Recom RCM-720-8DBNM?

Sharp GSD8K66H-740WT has a module efficiency of 23.82%, 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 Sharp GSD8K66H-740WT use vs Recom RCM-720-8DBNM?

Sharp GSD8K66H-740WT uses HJT 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 Sharp GSD8K66H-740WT and Recom RCM-720-8DBNM?

Sharp GSD8K66H-740WT 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 Sharp GSD8K66H-740WT and Recom RCM-720-8DBNM bifacial panels?

Both Sharp GSD8K66H-740WT 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.

Sharp

GSD8K66H-740WT

740 Wp 23.82 % HJT Bifacial

Open panel page Datasheet PDF

Recom

RCM-720-8DBNM

720 Wp 23.20 % TOPCon Bifacial

Open panel page Datasheet PDF

The verdict

GSD8K66H-740WT leads on the differences that matter

The largest is module efficiency: 0.62 pp more efficient. 6 of 19 comparable parameters are identical.

See all 13 differences

How alike are they

6 of 19 comparable
parameters are identical

identical differs

What actually differs

13 of 19 parameters

Parameter GSD8K66H-740WT RCM-720-8DBNM Difference

Module efficiency 23.82 % 23.20 % 0.62 pp more efficient

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

Product warranty 25 yrs 30 yrs 5 yrs longer

Power density 238.2 Wp/m² 231.8 Wp/m² 6.4 Wp/m² higher

Rated power 740 Wp 720 Wp 20 W more power

Cell technology HJT TOPCon HJT vs TOPCon

Open-circuit voltage 51.70 V 49.23 V 2.47 V apart

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

Weight 39.0 kg 37.8 kg 1.2 kg lighter

Short-circuit current 17.76 A 18.54 A 0.78 A apart

Voltage at max power 43.80 V 41.10 V 2.70 V apart

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

Current at max power 16.91 A 17.52 A 0.61 A apart

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

GSD8K66H-740WT

25,022 kWh

RCM-720-8DBNM

24,157 kWh

Lifetime gap

865 kWh

Output when it is hot

Rated power carried across the range a module actually sees

Scenario GSD8K66H-740WT RCM-720-8DBNM

Standard test conditions 25 °C 100.0% of rated power 740 W 720 W

Cool, bright day 40 °C 95.7% of rated power 711 W 689 W

Typical summer roof 55 °C 91.3% of rated power 682 W 657 W

Hot roof 70 °C 87.0% of rated power 653 W 626 W

Full specification

Parameter GSD8K66H-740WT RCM-720-8DBNM Difference

Power and efficiency

Rated power 740 Wp 720 Wp +20 W for GSD8K66H-740WT

Module efficiency 23.82 % 23.20 % +0.62 pp for GSD8K66H-740WT

Power density 238.2 Wp/m² 231.8 Wp/m² +6.4 Wp/m² for GSD8K66H-740WT

Open-circuit voltage 51.70 V 49.23 V 2.47 V apart

Voltage at max power 43.80 V 41.10 V 2.70 V apart

Short-circuit current 17.76 A 18.54 A 0.78 A apart

Current at max power 16.91 A 17.52 A 0.61 A apart

Temperature

Temperature coefficient -0.260 %/°C -0.290 %/°C +0.030 %/°C for GSD8K66H-740WT

Mechanical

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

Module area 3.106 m² 3.106 m² Same

Weight 39.0 kg 37.8 kg -1.2 kg for RCM-720-8DBNM

Weight per kWp 52.7 kg/kWp 52.5 kg/kWp Effectively the same

Warranty and degradation

Product warranty 25 yrs 30 yrs +5 yrs for RCM-720-8DBNM

Performance warranty 30 yrs 30 yrs Same

Annual degradation 0.35 %/yr 0.40 %/yr -0.05 %/yr for GSD8K66H-740WT

Technology

Cell technology HJT TOPCon HJT vs TOPCon

Cell type Monocrystalline Monocrystalline Same

Cell count 132 132 Same

Bifacial Yes Yes Same

Against the whole database

14,005 panels

Efficiency

#418 vs #1,306

GSD8K66H-740WT leads by 888 places

Power density

#431 vs #1,347

GSD8K66H-740WT leads by 916 places

Heat behaviour

#511 vs #2,165

GSD8K66H-740WT leads by 1,654 places

Weight

#6,344 vs #6,043

RCM-720-8DBNM leads by 301 places

Warranty

#21 vs #21

Tied - the same position in the database

Overall

#12 vs #23

GSD8K66H-740WT leads by 11 places

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Written summary

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Questions about this pairing

Which panel is better: Sharp GSD8K66H-740WT or Recom RCM-720-8DBNM?

According to our database: Sharp GSD8K66H-740WT has higher module efficiency (23.82% vs 23.20%); Sharp GSD8K66H-740WT 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 Sharp GSD8K66H-740WT and Recom RCM-720-8DBNM?

Sharp GSD8K66H-740WT has a module efficiency of 23.82%, 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 Sharp GSD8K66H-740WT use vs Recom RCM-720-8DBNM?

Sharp GSD8K66H-740WT uses HJT 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 Sharp GSD8K66H-740WT and Recom RCM-720-8DBNM?

Sharp GSD8K66H-740WT 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 Sharp GSD8K66H-740WT and Recom RCM-720-8DBNM bifacial panels?

Both Sharp GSD8K66H-740WT 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 Sharp and Recom as manufacturers Portfolio, efficiency, cell technologies and warranty terms

Shop prices: See 6 Sharp offers · See 3 Recom offers

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.