RS9H-M TOPCON-735 vs RS8V-M-425W FULL BLACK 5 of 19 identical Swap Change panels

Resun Solar RS9H-M TOPCON-735 vs Resun Solar RS8V-M-425W FULL BLACK

Q: Which panel is better: Resun Solar RS9H-M TOPCON-735 or Resun Solar RS8V-M-425W FULL BLACK?

According to our database: Resun Solar RS9H-M TOPCON-735 has higher module efficiency (23.66% vs 21.76%); Resun Solar RS8V-M-425W 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 RS9H-M TOPCON-735 and Resun Solar RS8V-M-425W FULL BLACK?

Resun Solar RS9H-M TOPCON-735 has a module efficiency of 23.66%, while Resun Solar RS8V-M-425W FULL BLACK is 21.76%. Higher efficiency means more electricity from the same roof area - useful when space is limited.

Q: What cell technology does Resun Solar RS9H-M TOPCON-735 use vs Resun Solar RS8V-M-425W FULL BLACK?

Resun Solar RS9H-M TOPCON-735 uses TOPCon cells; Resun Solar RS8V-M-425W FULL BLACK 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 RS9H-M TOPCON-735 and Resun Solar RS8V-M-425W FULL BLACK?

Resun Solar RS9H-M TOPCON-735 has a 30 years power warranty; Resun Solar RS8V-M-425W FULL BLACK 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

RS9H-M TOPCON-735

735 Wp 23.66 % TOPCon

Open panel page Datasheet PDF

Resun Solar

RS8V-M-425W FULL BLACK

425 Wp 21.76 % TOPCon

Open panel page Datasheet PDF

The verdict

RS9H-M TOPCON-735 leads on the differences that matter

The largest is module efficiency: 1.90 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 RS9H-M TOPCON-735 RS8V-M-425W FULL BLACK Difference

Module efficiency 23.66 % 21.76 % 1.90 pp more efficient

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

Rated power 735 Wp 425 Wp 310 W more power

Power density 236.6 Wp/m² 217.6 Wp/m² 19.0 Wp/m² higher

Weight 32.3 kg 21.5 kg 10.8 kg lighter

Weight per kWp 43.9 kg/kWp 50.6 kg/kWp 6.6 kg/kWp lighter

Open-circuit voltage 50.00 V 37.71 V 12.29 V apart

Short-circuit current 18.64 A 14.19 A 4.45 A apart

Module area 3.106 m² 1.953 m² 1.154 m² apart

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

Voltage at max power 41.90 V 31.94 V 9.96 V apart

Current at max power 17.55 A 13.31 A 4.24 A apart

Cell count 132 108 24 cells apart

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

RS9H-M TOPCON-735

24,277 kWh

RS8V-M-425W FULL BLACK

14,260 kWh

Lifetime gap

10,017 kWh

Output when it is hot

Rated power carried across the range a module actually sees

Scenario RS9H-M TOPCON-735 RS8V-M-425W FULL BLACK

Standard test conditions 25 °C 100.0% of rated power 735 W 425 W

Cool, bright day 40 °C 95.5% of rated power 702 W 409 W

Typical summer roof 55 °C 91.0% of rated power 669 W 393 W

Hot roof 70 °C 86.5% of rated power 636 W 377 W

Full specification

Parameter RS9H-M TOPCON-735 RS8V-M-425W FULL BLACK Difference

Power and efficiency

Rated power 735 Wp 425 Wp +310 W for RS9H-M TOPCON-735

Module efficiency 23.66 % 21.76 % +1.90 pp for RS9H-M TOPCON-735

Power density 236.6 Wp/m² 217.6 Wp/m² +19.0 Wp/m² for RS9H-M TOPCON-735

Open-circuit voltage 50.00 V 37.71 V 12.29 V apart

Voltage at max power 41.90 V 31.94 V 9.96 V apart

Short-circuit current 18.64 A 14.19 A 4.45 A apart

Current at max power 17.55 A 13.31 A 4.24 A apart

Temperature

Temperature coefficient -0.300 %/°C -0.250 %/°C +0.050 %/°C for RS8V-M-425W FULL BLACK

Mechanical

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

Module area 3.106 m² 1.953 m² 1.154 m² apart

Weight 32.3 kg 21.5 kg -10.8 kg for RS8V-M-425W FULL BLACK

Weight per kWp 43.9 kg/kWp 50.6 kg/kWp -6.6 kg/kWp for RS9H-M TOPCON-735

Warranty and degradation

Product warranty 15 yrs 15 yrs Same

Performance warranty 30 yrs 30 yrs Same

Annual degradation 0.50 %/yr 0.40 %/yr -0.10 %/yr for RS8V-M-425W FULL BLACK

Technology

Cell technology TOPCon TOPCon Same

Cell type Monocrystalline Monocrystalline Same

Cell count 132 108 24 cells apart

Bifacial No No Same

Against the whole database

14,005 panels

Efficiency

#602 vs #7,285

RS9H-M TOPCON-735 leads by 6,683 places

Power density

#582 vs #7,172

RS9H-M TOPCON-735 leads by 6,590 places

Heat behaviour

#6,093 vs #456

RS8V-M-425W FULL BLACK leads by 5,637 places

Weight

#364 vs #3,991

RS9H-M TOPCON-735 leads by 3,627 places

Warranty

#21 vs #21

Tied - the same position in the database

Overall

#149 vs #9,910

RS9H-M TOPCON-735 leads by 9,761 places

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Written summary

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Questions about this pairing

Which panel is better: Resun Solar RS9H-M TOPCON-735 or Resun Solar RS8V-M-425W FULL BLACK?

According to our database: Resun Solar RS9H-M TOPCON-735 has higher module efficiency (23.66% vs 21.76%); Resun Solar RS8V-M-425 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 RS9H-M TOPCON-735 and Resun Solar RS8V-M-425W FULL BLACK?

Resun Solar RS9H-M TOPCON-735 has a module efficiency of 23.66%, while Resun Solar RS8V-M-425 W FULL BLACK is 21.76%. Higher efficiency means more electricity from the same roof area - useful when space is limited.

What cell technology does Resun Solar RS9H-M TOPCON-735 use vs Resun Solar RS8V-M-425W FULL BLACK?

Resun Solar RS9H-M TOPCON-735 uses TOPCon cells; Resun Solar RS8V-M-425 W FULL BLACK 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 RS9H-M TOPCON-735 and Resun Solar RS8V-M-425W FULL BLACK?

Resun Solar RS9H-M TOPCON-735 has a 30 years power warranty; Resun Solar RS8V-M-425 W FULL BLACK 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.