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RS9H-M TOPCON-730 vs RS8V425M-FB 6 of 19 identical Swap Change panels

Resun Solar RS9H-M TOPCON-730 vs Resun Solar RS8V425M-FB

Resun Solar RS9H-M TOPCON-730
Resun Solar
RS9H-M TOPCON-730
730 Wp 23.50 % TOPCon
Open panel page Datasheet PDF
VS
Resun Solar
RS8V425M-FB
425 Wp 21.76 % TOPCon
Open panel page Datasheet PDF
The verdict

RS9H-M TOPCON-730 leads on the differences that matter

The largest is module efficiency: 1.74 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
01

What actually differs

13 of 19 parameters
Parameter RS9H-M TOPCON-730 RS8V425M-FB Difference
Module efficiency 23.50 % 21.76 % 1.74 pp more efficient
Temperature coefficient -0.300 %/°C -0.350 %/°C 0.050 %/°C better in heat
Rated power 730 Wp 425 Wp 305 W more power
Power density 235.0 Wp/m² 217.6 Wp/m² 17.4 Wp/m² higher
Weight 32.3 kg 21.5 kg 10.8 kg lighter
Weight per kWp 44.2 kg/kWp 50.6 kg/kWp 6.3 kg/kWp lighter
Open-circuit voltage 49.80 V 37.71 V 12.09 V apart
Short-circuit current 18.59 A 14.19 A 4.40 A apart
Module area 3.106 m² 1.953 m² 1.154 m² apart
Voltage at max power 41.70 V 31.94 V 9.76 V apart
Current at max power 17.51 A 13.31 A 4.20 A apart
Cell count 132 108 24 cells apart
Dimensions 2384x1303x30 mm 1722x1134x30 mm 2384x1303x30 mm vs 1722x1134x30 mm
02

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
RS9H-M TOPCON-730
24,112 kWh
RS8V425M-FB
14,038 kWh
Lifetime gap
10,074 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario RS9H-M TOPCON-730 RS8V425M-FB
Standard test conditions 25 °C 100.0% of rated power 730 W 425 W
Cool, bright day 40 °C 94.8% of rated power 697 W 403 W
Typical summer roof 55 °C 89.5% of rated power 664 W 380 W
Hot roof 70 °C 84.2% of rated power 631 W 358 W
03

Full specification

Parameter RS9H-M TOPCON-730 RS8V425M-FB Difference
Power and efficiency
Rated power 730 Wp 425 Wp +305 W for RS9H-M TOPCON-730
Module efficiency 23.50 % 21.76 % +1.74 pp for RS9H-M TOPCON-730
Power density 235.0 Wp/m² 217.6 Wp/m² +17.4 Wp/m² for RS9H-M TOPCON-730
Open-circuit voltage 49.80 V 37.71 V 12.09 V apart
Voltage at max power 41.70 V 31.94 V 9.76 V apart
Short-circuit current 18.59 A 14.19 A 4.40 A apart
Current at max power 17.51 A 13.31 A 4.20 A apart
Temperature
Temperature coefficient -0.300 %/°C -0.350 %/°C +0.050 %/°C for RS9H-M TOPCON-730
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 RS8V425M-FB
Weight per kWp 44.2 kg/kWp 50.6 kg/kWp -6.3 kg/kWp for RS9H-M TOPCON-730
Warranty and degradation
Product warranty 15 yrs 15 yrs Same
Performance warranty 30 yrs 30 yrs Same
Annual degradation 0.50 %/yr 0.50 %/yr Same
Technology
Cell technology TOPCon TOPCon Same
Cell type Monocrystalline Monocrystalline Same
Cell count 132 108 24 cells apart
Bifacial No No Same
04

Against the whole database

14,005 panels
Efficiency
#716 vs #7,285
RS9H-M TOPCON-730 leads by 6,569 places
Power density
#800 vs #7,172
RS9H-M TOPCON-730 leads by 6,372 places
Heat behaviour
#6,093 vs #10,419
RS9H-M TOPCON-730 leads by 4,326 places
Weight
#407 vs #3,991
RS9H-M TOPCON-730 leads by 3,584 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#179 vs #9,910
RS9H-M TOPCON-730 leads by 9,731 places
05

More useful comparisons

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06

Written summary

07

Questions about this pairing

Which panel is better: Resun Solar RS9H-M TOPCON-730 or Resun Solar RS8V425M-FB?
According to our database: Resun Solar RS9H-M TOPCON-730 has higher module efficiency (23.50% vs 21.76%); Resun Solar RS9H-M TOPCON-730 tolerates heat better (temp coeff -0.300%/°C vs -0.350%/°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-730 and Resun Solar RS8V425M-FB?
Resun Solar RS9H-M TOPCON-730 has a module efficiency of 23.50%, while Resun Solar RS8V425M-FB 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-730 use vs Resun Solar RS8V425M-FB?
Resun Solar RS9H-M TOPCON-730 uses TOPCon cells; Resun Solar RS8V425M-FB 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-730 and Resun Solar RS8V425M-FB?
Resun Solar RS9H-M TOPCON-730 has a 30 years power warranty; Resun Solar RS8V425M-FB 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.