RS8V-M-420W FULL BLACK vs RS9H-M TOPCON-720 5 of 19 identical Swap Change panels

Resun Solar RS8V-M-420W FULL BLACK vs Resun Solar RS9H-M TOPCON-720

Q: Which panel is better: Resun Solar RS8V-M-420W FULL BLACK or Resun Solar RS9H-M TOPCON-720?

According to our database: Resun Solar RS9H-M TOPCON-720 has higher module efficiency (23.18% vs 21.51%); Resun Solar RS8V-M-420W FULL BLACK tolerates heat better (temp coeff -0.250%/°C vs -0.300%/°C). See the full spec comparison and 30-year energy simulation above for a complete picture.

Q: What is the efficiency of Resun Solar RS8V-M-420W FULL BLACK and Resun Solar RS9H-M TOPCON-720?

Resun Solar RS8V-M-420W FULL BLACK has a module efficiency of 21.51%, while Resun Solar RS9H-M TOPCON-720 is 23.18%. Higher efficiency means more electricity from the same roof area - useful when space is limited.

Q: What cell technology does Resun Solar RS8V-M-420W FULL BLACK use vs Resun Solar RS9H-M TOPCON-720?

Resun Solar RS8V-M-420W FULL BLACK uses TOPCon cells; Resun Solar RS9H-M TOPCON-720 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 Resun Solar RS8V-M-420W FULL BLACK and Resun Solar RS9H-M TOPCON-720?

Resun Solar RS8V-M-420W FULL BLACK has a 30 years power warranty; Resun Solar RS9H-M TOPCON-720 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.

Resun Solar

RS8V-M-420W FULL BLACK

420 Wp 21.51 % TOPCon

Open panel page Datasheet PDF

Resun Solar

RS9H-M TOPCON-720

720 Wp 23.18 % TOPCon

Open panel page Datasheet PDF

The verdict

RS9H-M TOPCON-720 leads on the differences that matter

The largest is module efficiency: 1.67 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 RS8V-M-420W FULL BLACK RS9H-M TOPCON-720 Difference

Module efficiency 21.51 % 23.18 % 1.67 pp more efficient

Temperature coefficient -0.250 %/°C -0.300 %/°C 0.050 %/°C better in heat

Rated power 420 Wp 720 Wp 300 W more power

Power density 215.1 Wp/m² 231.8 Wp/m² 16.7 Wp/m² higher

Weight 21.5 kg 32.3 kg 10.8 kg lighter

Weight per kWp 51.2 kg/kWp 44.9 kg/kWp 6.3 kg/kWp lighter

Open-circuit voltage 37.58 V 49.40 V 11.82 V apart

Short-circuit current 14.11 A 18.49 A 4.38 A apart

Module area 1.953 m² 3.106 m² 1.154 m² apart

Annual degradation 0.40 %/yr 0.50 %/yr 0.10 %/yr slower

Voltage at max power 31.78 V 41.30 V 9.52 V apart

Current at max power 13.22 A 17.44 A 4.22 A apart

Cell count 108 132 24 cells apart

Dimensions 1722x1134x30 mm 2384x1303x30 mm 1722x1134x30 mm vs 2384x1303x30 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

RS8V-M-420W FULL BLACK

14,092 kWh

RS9H-M TOPCON-720

23,782 kWh

Lifetime gap

9,690 kWh

Output when it is hot

Rated power carried across the range a module actually sees

Scenario RS8V-M-420W FULL BLACK RS9H-M TOPCON-720

Standard test conditions 25 °C 100.0% of rated power 420 W 720 W

Cool, bright day 40 °C 95.5% of rated power 404 W 688 W

Typical summer roof 55 °C 91.0% of rated power 389 W 655 W

Hot roof 70 °C 86.5% of rated power 373 W 623 W

Full specification

Parameter RS8V-M-420W FULL BLACK RS9H-M TOPCON-720 Difference

Power and efficiency

Rated power 420 Wp 720 Wp +300 W for RS9H-M TOPCON-720

Module efficiency 21.51 % 23.18 % +1.67 pp for RS9H-M TOPCON-720

Power density 215.1 Wp/m² 231.8 Wp/m² +16.7 Wp/m² for RS9H-M TOPCON-720

Open-circuit voltage 37.58 V 49.40 V 11.82 V apart

Voltage at max power 31.78 V 41.30 V 9.52 V apart

Short-circuit current 14.11 A 18.49 A 4.38 A apart

Current at max power 13.22 A 17.44 A 4.22 A apart

Temperature

Temperature coefficient -0.250 %/°C -0.300 %/°C +0.050 %/°C for RS8V-M-420W FULL BLACK

Mechanical

Dimensions 1722x1134x30 mm 2384x1303x30 mm 1722x1134x30 mm vs 2384x1303x30 mm

Module area 1.953 m² 3.106 m² 1.154 m² apart

Weight 21.5 kg 32.3 kg -10.8 kg for RS8V-M-420W FULL BLACK

Weight per kWp 51.2 kg/kWp 44.9 kg/kWp -6.3 kg/kWp for RS9H-M TOPCON-720

Warranty and degradation

Product warranty 15 yrs 15 yrs Same

Performance warranty 30 yrs 30 yrs Same

Annual degradation 0.40 %/yr 0.50 %/yr -0.10 %/yr for RS8V-M-420W FULL BLACK

Technology

Cell technology TOPCon TOPCon Same

Cell type Monocrystalline Monocrystalline Same

Cell count 108 132 24 cells apart

Bifacial No No Same

Against the whole database

14,005 panels

Efficiency

#7,894 vs #1,424

RS9H-M TOPCON-720 leads by 6,470 places

Power density

#7,882 vs #1,347

RS9H-M TOPCON-720 leads by 6,535 places

Heat behaviour

#456 vs #6,093

RS8V-M-420W FULL BLACK leads by 5,637 places

Weight

#4,567 vs #559

RS9H-M TOPCON-720 leads by 4,008 places

Warranty

#21 vs #21

Tied - the same position in the database

Overall

#10,194 vs #325

RS9H-M TOPCON-720 leads by 9,869 places

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The same specification on paper

Written summary

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Questions about this pairing

Which panel is better: Resun Solar RS8V-M-420W FULL BLACK or Resun Solar RS9H-M TOPCON-720?

According to our database: Resun Solar RS9H-M TOPCON-720 has higher module efficiency (23.18% vs 21.51%); Resun Solar RS8V-M-420 W FULL BLACK tolerates heat better (temp coeff -0.250%/°C vs -0.300%/°C). See the full spec comparison and 30-year energy simulation above for a complete picture.

What is the efficiency of Resun Solar RS8V-M-420W FULL BLACK and Resun Solar RS9H-M TOPCON-720?

Resun Solar RS8V-M-420 W FULL BLACK has a module efficiency of 21.51%, while Resun Solar RS9H-M TOPCON-720 is 23.18%. Higher efficiency means more electricity from the same roof area - useful when space is limited.

What cell technology does Resun Solar RS8V-M-420W FULL BLACK use vs Resun Solar RS9H-M TOPCON-720?

Resun Solar RS8V-M-420 W FULL BLACK uses TOPCon cells; Resun Solar RS9H-M TOPCON-720 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 Resun Solar RS8V-M-420W FULL BLACK and Resun Solar RS9H-M TOPCON-720?

Resun Solar RS8V-M-420 W FULL BLACK has a 30 years power warranty; Resun Solar RS9H-M TOPCON-720 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.

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.