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620N-E2 vs 620NBG-E2 16 of 19 identical Swap Change panels

Renesola RS7-620N-E2 vs Renesola RS7-620NBG-E2

Renesola RS7-620N-E2
Renesola
RS7-620N-E2
620 Wp 22.18 % N-type
Open panel page Datasheet PDF
VS
Renesola
RS7-620NBG-E2
620 Wp 22.18 % N-type Bifacial
Open panel page Datasheet PDF
The verdict

620N-E2 leads on the differences that matter

The largest is weight: 5.0 kg lighter. 16 of 19 comparable parameters are identical.

See all 3 differences
How alike are they
16 of 19 comparable
parameters are identical
identical differs
01

What actually differs

3 of 19 parameters
Parameter 620N-E2 620NBG-E2 Difference
Weight 30.0 kg 35.0 kg 5.0 kg lighter
Weight per kWp 48.4 kg/kWp 56.5 kg/kWp 8.1 kg/kWp lighter
Bifacial No Yes No vs Yes
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
Same temp coeff. for both panels (-0.290 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other.
620N-E2
20,802 kWh
620NBG-E2
20,802 kWh
Lifetime gap
No difference
Output when it is hot
Rated power carried across the range a module actually sees
Scenario 620N-E2 620NBG-E2
Standard test conditions 25 °C 100.0% of rated power 620 W 620 W
Cool, bright day 40 °C 95.7% of rated power 593 W 593 W
Typical summer roof 55 °C 91.3% of rated power 566 W 566 W
Hot roof 70 °C 87.0% of rated power 539 W 539 W
03

Full specification

Parameter 620N-E2 620NBG-E2 Difference
Power and efficiency
Rated power 620 Wp 620 Wp Same
Module efficiency 22.18 % 22.18 % Same
Power density 221.8 Wp/m² 221.8 Wp/m² Same
Open-circuit voltage 56.80 V 57.37 V Effectively the same
Voltage at max power 46.97 V 47.37 V Effectively the same
Short-circuit current 13.86 A 13.74 A Effectively the same
Current at max power 13.20 A 13.09 A Effectively the same
Temperature
Temperature coefficient -0.290 %/°C -0.290 %/°C Same
Mechanical
Dimensions 2465x1134x30 mm 2465x1134x30 mm Same
Module area 2.795 m² 2.795 m² Same
Weight 30.0 kg 35.0 kg -5.0 kg for 620N-E2
Weight per kWp 48.4 kg/kWp 56.5 kg/kWp -8.1 kg/kWp for 620N-E2
Warranty and degradation
Product warranty 15 yrs 15 yrs Same
Performance warranty 30 yrs 30 yrs Same
Annual degradation 0.40 %/yr 0.40 %/yr Same
Technology
Cell technology N-type N-type Same
Cell type Monocrystalline Monocrystalline Same
Cell count 156 156 Same
Bifacial No Yes No vs Yes
04

Against the whole database

14,129 panels
Efficiency
#5,994 vs #5,994
Tied - the same position in the database
Power density
#5,933 vs #5,933
Tied - the same position in the database
Heat behaviour
#2,220 vs #2,220
Tied - the same position in the database
Weight
#2,248 vs #10,738
620N-E2 leads by 8,490 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#2,809 vs #2,907
620N-E2 leads by 98 places
05

More useful comparisons

Open the full database
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06

Written summary

07

Questions about this pairing

Which panel is better: Renesola RS7-620N-E2 or Renesola RS7-620NBG-E2?
According to our database: both panels are closely matched on key specs - the decision often comes down to price and local availability. See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Renesola RS7-620N-E2 and Renesola RS7-620NBG-E2?
Renesola RS7-620N-E2 has a module efficiency of 22.18%, while Renesola RS7-620NBG-E2 is 22.18%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Renesola RS7-620N-E2 use vs Renesola RS7-620NBG-E2?
Renesola RS7-620N-E2 uses N-type cells; Renesola RS7-620NBG-E2 uses N-type. 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 Renesola RS7-620N-E2 and Renesola RS7-620NBG-E2?
Renesola RS7-620N-E2 has a 30 years power warranty; Renesola RS7-620NBG-E2 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 Renesola RS7-620N-E2 and Renesola RS7-620NBG-E2 bifacial panels?
Renesola RS7-620NBG-E2 is bifacial (captures light from both faces); Renesola RS7-620N-E2 is monofacial. Bifacial panels work best on ground mounts or raised structures with a light-coloured surface underneath.

Shop prices: See 1 Renesola offer

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.