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M-DG vs M TOPCON-435W 13 of 19 identical Swap Change panels

Resun Solar RS8V-M-DG vs Resun Solar RS8V-M TOPCON-435W

Resun Solar RS8V-M-DG
Resun Solar
RS8V-M-DG
440 Wp 22.53 % TOPCon Bifacial
Open panel page Datasheet PDF
VS
Resun Solar RS8V-M TOPCON-435W
Resun Solar
RS8V-M TOPCON-435W
435 Wp 22.28 % TOPCon
Open panel page Datasheet PDF
The verdict

6 differences, and they point both ways

The largest is product warranty: 3 yrs longer. 13 of 19 comparable parameters are identical.

See all 6 differences
How alike are they
13 of 19 comparable
parameters are identical
identical differs
01

What actually differs

6 of 19 parameters
Parameter M-DG M TOPCON-435W Difference
Product warranty 15 yrs 12 yrs 3 yrs longer
Annual degradation 0.50 %/yr 0.40 %/yr 0.10 %/yr slower
Weight per kWp 54.1 kg/kWp 49.4 kg/kWp 4.7 kg/kWp lighter
Weight 23.8 kg 21.5 kg 2.3 kg lighter
Module efficiency 22.53 % 22.28 % 0.25 pp more efficient
Bifacial Yes No Yes vs No
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
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-DG
14,533 kWh
M TOPCON-435W
14,595 kWh
Lifetime gap
62 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario M-DG M TOPCON-435W
Standard test conditions 25 °C 100.0% of rated power 440 W 435 W
Cool, bright day 40 °C 95.5% of rated power 420 W 415 W
Typical summer roof 55 °C 91.0% of rated power 400 W 396 W
Hot roof 70 °C 86.5% of rated power 381 W 376 W
03

Full specification

Parameter M-DG M TOPCON-435W Difference
Power and efficiency
Rated power 440 Wp 435 Wp Effectively the same
Module efficiency 22.53 % 22.28 % +0.25 pp for M-DG
Power density 225.3 Wp/m² 222.8 Wp/m² Effectively the same
Open-circuit voltage 38.10 V 38.60 V Effectively the same
Voltage at max power 32.41 V 32.40 V Effectively the same
Short-circuit current 14.43 A 14.31 A Effectively the same
Current at max power 13.58 A 13.43 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 23.8 kg 21.5 kg -2.3 kg for M TOPCON-435W
Weight per kWp 54.1 kg/kWp 49.4 kg/kWp -4.7 kg/kWp for M TOPCON-435W
Warranty and degradation
Product warranty 15 yrs 12 yrs +3 yrs for M-DG
Performance warranty 30 yrs 30 yrs Same
Annual degradation 0.50 %/yr 0.40 %/yr -0.10 %/yr for M TOPCON-435W
Technology
Cell technology TOPCon TOPCon Same
Cell type Monocrystalline Monocrystalline Same
Cell count 108 108 Same
Bifacial Yes No Yes vs No
04

Against the whole database

14,005 panels
Efficiency
#3,982 vs #5,403
M-DG leads by 1,421 places
Power density
#4,099 vs #5,150
M-DG leads by 1,051 places
Heat behaviour
#6,093 vs #6,093
Tied - the same position in the database
Weight
#8,316 vs #2,936
M TOPCON-435W leads by 5,380 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#8,801 vs #9,695
M-DG leads by 894 places
05

More useful comparisons

Open the full database
Same series, other bin
Resun Solar
Resun Solar RS8V-M-DG vs Resun Solar RS8V-M-DG-440
The same specification on paper
Same series, other bin
Resun Solar
Resun Solar RS8V-M-DG vs Resun Solar RS8V-M-DG-435
One difference: module efficiency
Same series, other bin
Resun Solar
Resun Solar RS8V-M-DG vs Resun Solar RS8V-M-DG-430
3 differences, the largest is module efficiency
Same series, other bin
Resun Solar
Resun Solar RS8V-M-DG vs Resun Solar RS8V-M-DG-425
3 differences, the largest is module efficiency
Same series, other bin
Resun Solar
Resun Solar RS8V-M-DG vs Resun Solar RS8V-M-DG-420
4 differences, the largest is module efficiency
Same series, other bin
Resun Solar
Resun Solar RS8V-M-DG vs Resun Solar RS8V-M-DG-415
5 differences, the largest is module efficiency
06

Written summary

07

Questions about this pairing

Which panel is better: Resun Solar RS8V-M-DG or Resun Solar RS8V-M TOPCON-435W?
According to our database: Resun Solar RS8V-M-DG has higher module efficiency (22.53% vs 22.28%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Resun Solar RS8V-M-DG and Resun Solar RS8V-M TOPCON-435W?
Resun Solar RS8V-M-DG has a module efficiency of 22.53%, while Resun Solar RS8V-M TOPCON-435 W is 22.28%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Resun Solar RS8V-M-DG use vs Resun Solar RS8V-M TOPCON-435W?
Resun Solar RS8V-M-DG uses TOPCon cells; Resun Solar RS8V-M TOPCON-435 W 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-DG and Resun Solar RS8V-M TOPCON-435W?
Resun Solar RS8V-M-DG has a 30 years power warranty; Resun Solar RS8V-M TOPCON-435 W 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-DG and Resun Solar RS8V-M TOPCON-435W bifacial panels?
Resun Solar RS8V-M-DG is bifacial (captures light from both faces); Resun Solar RS8V-M TOPCON-435 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.