M TOPCON-430W vs M-DG-440 11 of 19 identical Swap Change panels

Resun Solar RS8V-M TOPCON-430W vs Resun Solar RS8V-M-DG-440

Q: Which panel is better: Resun Solar RS8V-M TOPCON-430W or Resun Solar RS8V-M-DG-440?

According to our database: Resun Solar RS8V-M-DG-440 has higher module efficiency (22.53% vs 22.02%). 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 TOPCON-430W and Resun Solar RS8V-M-DG-440?

Resun Solar RS8V-M TOPCON-430W has a module efficiency of 22.02%, while Resun Solar RS8V-M-DG-440 is 22.53%. Higher efficiency means more electricity from the same roof area - useful when space is limited.

Q: What cell technology does Resun Solar RS8V-M TOPCON-430W use vs Resun Solar RS8V-M-DG-440?

Resun Solar RS8V-M TOPCON-430W uses TOPCon cells; Resun Solar RS8V-M-DG-440 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 TOPCON-430W and Resun Solar RS8V-M-DG-440?

Resun Solar RS8V-M TOPCON-430W has a 30 years power warranty; Resun Solar RS8V-M-DG-440 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 Resun Solar RS8V-M TOPCON-430W and Resun Solar RS8V-M-DG-440 bifacial panels?

Resun Solar RS8V-M-DG-440 is bifacial (captures light from both faces); Resun Solar RS8V-M TOPCON-430W is monofacial. Bifacial panels work best on ground mounts or raised structures with a light-coloured surface underneath.

Resun Solar

RS8V-M TOPCON-430W

430 Wp 22.02 % TOPCon

Open panel page Datasheet PDF

Resun Solar

RS8V-M-DG-440

440 Wp 22.53 % TOPCon Bifacial

Open panel page Datasheet PDF

The verdict

M-DG-440 leads on the differences that matter

The largest is module efficiency: 0.51 pp more efficient. 11 of 19 comparable parameters are identical.

See all 8 differences

How alike are they

11 of 19 comparable
parameters are identical

identical differs

What actually differs

8 of 19 parameters

Parameter M TOPCON-430W M-DG-440 Difference

Module efficiency 22.02 % 22.53 % 0.51 pp more efficient

Product warranty 12 yrs 15 yrs 3 yrs longer

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

Weight 21.5 kg 23.8 kg 2.3 kg lighter

Power density 220.2 Wp/m² 225.3 Wp/m² 5.1 Wp/m² higher

Weight per kWp 50.0 kg/kWp 54.1 kg/kWp 4.1 kg/kWp lighter

Rated power 430 Wp 440 Wp 10 W more power

Bifacial No Yes No vs Yes

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

Same temp coeff. for both panels (-0.300 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other.

M TOPCON-430W

14,427 kWh

M-DG-440

14,533 kWh

Lifetime gap

106 kWh

Output when it is hot

Rated power carried across the range a module actually sees

Scenario M TOPCON-430W M-DG-440

Standard test conditions 25 °C 100.0% of rated power 430 W 440 W

Cool, bright day 40 °C 95.5% of rated power 411 W 420 W

Typical summer roof 55 °C 91.0% of rated power 391 W 400 W

Hot roof 70 °C 86.5% of rated power 372 W 381 W

Full specification

Parameter M TOPCON-430W M-DG-440 Difference

Power and efficiency

Rated power 430 Wp 440 Wp +10 W for M-DG-440

Module efficiency 22.02 % 22.53 % +0.51 pp for M-DG-440

Power density 220.2 Wp/m² 225.3 Wp/m² +5.1 Wp/m² for M-DG-440

Open-circuit voltage 38.40 V 38.90 V Effectively the same

Voltage at max power 32.20 V 32.45 V Effectively the same

Short-circuit current 14.24 A 14.36 A Effectively the same

Current at max power 13.36 A 13.56 A Effectively the same

Temperature

Temperature coefficient -0.300 %/°C -0.300 %/°C Same

Mechanical

Dimensions 1722x1134x30 mm 1722x1134x30 mm Same

Module area 1.953 m² 1.953 m² Same

Weight 21.5 kg 23.8 kg -2.3 kg for M TOPCON-430W

Weight per kWp 50.0 kg/kWp 54.1 kg/kWp -4.1 kg/kWp for M TOPCON-430W

Warranty and degradation

Product warranty 12 yrs 15 yrs +3 yrs for M-DG-440

Performance warranty 30 yrs 30 yrs Same

Annual degradation 0.40 %/yr 0.50 %/yr -0.10 %/yr for M TOPCON-430W

Technology

Cell technology TOPCon TOPCon Same

Cell type Monocrystalline Monocrystalline Same

Cell count 108 108 Same

Bifacial No Yes No vs Yes

Against the whole database

14,005 panels

Efficiency

#6,329 vs #3,982

M-DG-440 leads by 2,347 places

Power density

#6,481 vs #4,099

M-DG-440 leads by 2,382 places

Heat behaviour

#6,093 vs #6,093

Tied - the same position in the database

Weight

#3,317 vs #8,316

M TOPCON-430W leads by 4,999 places

Warranty

#21 vs #21

Tied - the same position in the database

Overall

#9,992 vs #8,801

M-DG-440 leads by 1,191 places

More useful comparisons

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Written summary

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Questions about this pairing

Which panel is better: Resun Solar RS8V-M TOPCON-430W or Resun Solar RS8V-M-DG-440?

According to our database: Resun Solar RS8V-M-DG-440 has higher module efficiency (22.53% vs 22.02%). See the full spec comparison and 30-year energy simulation above for a complete picture.

What is the efficiency of Resun Solar RS8V-M TOPCON-430W and Resun Solar RS8V-M-DG-440?

Resun Solar RS8V-M TOPCON-430 W has a module efficiency of 22.02%, while Resun Solar RS8V-M-DG-440 is 22.53%. Higher efficiency means more electricity from the same roof area - useful when space is limited.

What cell technology does Resun Solar RS8V-M TOPCON-430W use vs Resun Solar RS8V-M-DG-440?

Resun Solar RS8V-M TOPCON-430 W uses TOPCon cells; Resun Solar RS8V-M-DG-440 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 TOPCON-430W and Resun Solar RS8V-M-DG-440?

Resun Solar RS8V-M TOPCON-430 W has a 30 years power warranty; Resun Solar RS8V-M-DG-440 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 Resun Solar RS8V-M TOPCON-430W and Resun Solar RS8V-M-DG-440 bifacial panels?

Resun Solar RS8V-M-DG-440 is bifacial (captures light from both faces); Resun Solar RS8V-M TOPCON-430 W is monofacial. Bifacial panels work best on ground mounts or raised structures with a light-coloured surface underneath.

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.