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8NM vs 8DBNM 13 of 18 identical Swap Change panels

Recom RCM-715-8NM vs Recom RCM-715-8DBNM

Recom RCM-715-8NM
Recom
RCM-715-8NM
715 Wp 23.02 % TOPCon
Open panel page Datasheet PDF
VS
Recom RCM-715-8DBNM
Recom
RCM-715-8DBNM
715 Wp 23.00 % TOPCon Bifacial
Open panel page Datasheet PDF
The verdict

8NM leads on the differences that matter

The largest is weight: 3.9 kg lighter. 13 of 18 comparable parameters are identical, with 1 more left out because at least one datasheet does not publish it.

See all 5 differences
How alike are they
13 of 18 comparable
parameters are identical
identical differs not published
01

What actually differs

5 of 18 parameters
Parameter 8NM 8DBNM Difference
Weight 33.9 kg 37.8 kg 3.9 kg lighter
Weight per kWp 47.4 kg/kWp 52.9 kg/kWp 5.5 kg/kWp lighter
Temperature coefficient -0.300 %/°C -0.290 %/°C 0.010 %/°C better in heat
Bifacial No Yes No vs Yes
Dimensions 2384x1303x30 mm 2384x1303x33 mm 2384x1303x30 mm vs 2384x1303x33 mm
02

What it means on a roof

Thirty years of production
Each panel's own declared degradation curve, at 1,200 kWh/kWp a year
8NM
23,990 kWh
8DBNM
23,990 kWh
Lifetime gap
No difference
Output when it is hot
Rated power carried across the range a module actually sees
Scenario 8NM 8DBNM
Standard test conditions 25 °C 100.0% of rated power 715 W 715 W
Cool, bright day 40 °C 95.5% of rated power 683 W 684 W
Typical summer roof 55 °C 91.0% of rated power 651 W 653 W
Hot roof 70 °C 86.5% of rated power 618 W 622 W
03

Full specification

Parameter 8NM 8DBNM Difference
Power and efficiency
Rated power 715 Wp 715 Wp Same
Module efficiency 23.02 % 23.00 % Effectively the same
Power density 230.2 Wp/m² 230.2 Wp/m² Same
Open-circuit voltage 48.90 V 49.05 V Effectively the same
Voltage at max power 41.10 V 40.93 V Effectively the same
Short-circuit current 18.39 A 18.48 A Effectively the same
Current at max power 17.40 A 17.47 A Effectively the same
Temperature
Temperature coefficient -0.300 %/°C -0.290 %/°C +0.010 %/°C for 8DBNM
Mechanical
Dimensions 2384x1303x30 mm 2384x1303x33 mm 2384x1303x30 mm vs 2384x1303x33 mm
Module area 3.106 m² 3.106 m² Same
Weight 33.9 kg 37.8 kg -3.9 kg for 8NM
Weight per kWp 47.4 kg/kWp 52.9 kg/kWp -5.5 kg/kWp for 8NM
Warranty and degradation
Product warranty 30 yrs 30 yrs Same
Performance warranty 30 yrs 30 yrs Same
Annual degradation 0.40 %/yr 0.40 %/yr Same
Technology
Cell technology TOPCon TOPCon Same
Cell type Monocrystalline Monocrystalline Same
Cell count - 132 Not published by Recom
Bifacial No Yes No vs Yes
04

Against the whole database

14,005 panels
Efficiency
#1,797 vs #1,919
8NM leads by 122 places
Power density
#2,018 vs #2,018
Tied - the same position in the database
Heat behaviour
#6,093 vs #2,165
8DBNM leads by 3,928 places
Weight
#1,670 vs #6,576
8NM leads by 4,906 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#37 vs #40
8NM leads by 3 places
05

More useful comparisons

Open the full database
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Recom RCM-715-8NM vs Recom RCM-730-8DBNM
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Recom RCM-715-8NM vs Recom RCM-725-8DBNM
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Recom RCM-715-8NM vs Recom RCM-720-8DBNM
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Recom RCM-715-8NM vs Recom RCM-710-8DBNM
5 differences, the largest is weight
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Recom RCM-715-8NM vs Recom RCM-710-8NM
The same specification on paper
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Recom RCM-715-8NM vs Recom RCM-705-8DBNM
8 differences, the largest is weight
06

Written summary

07

Questions about this pairing

Which panel is better: Recom RCM-715-8NM or Recom RCM-715-8DBNM?
According to our database: Recom RCM-715-8NM has higher module efficiency (23.02% vs 23.00%); Recom RCM-715-8DBNM tolerates heat better (temp coeff -0.290%/°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 Recom RCM-715-8NM and Recom RCM-715-8DBNM?
Recom RCM-715-8NM has a module efficiency of 23.02%, while Recom RCM-715-8DBNM is 23.00%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Recom RCM-715-8NM use vs Recom RCM-715-8DBNM?
Recom RCM-715-8NM uses TOPCon cells; Recom RCM-715-8DBNM 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 Recom RCM-715-8NM and Recom RCM-715-8DBNM?
Recom RCM-715-8NM has a 30 years power warranty; Recom RCM-715-8DBNM 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 Recom RCM-715-8NM and Recom RCM-715-8DBNM bifacial panels?
Recom RCM-715-8DBNM is bifacial (captures light from both faces); Recom RCM-715-8NM is monofacial. Bifacial panels work best on ground mounts or raised structures with a light-coloured surface underneath.

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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.