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615NBG-E1 vs 635NBG-E1 16 of 19 identical Swap Change panels

Renesola RS5J-615NBG-E1 vs Renesola RS5J-635NBG-E1

Renesola
RS5J-615NBG-E1
615 Wp 22.77 % N-type Bifacial
Open panel page Datasheet PDF
VS
Renesola
RS5J-635NBG-E1
635 Wp 23.51 % N-type Bifacial
Open panel page Datasheet PDF
The verdict

635NBG-E1 leads on the differences that matter

The largest is module efficiency: 0.74 pp more efficient. 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 615NBG-E1 635NBG-E1 Difference
Module efficiency 22.77 % 23.51 % 0.74 pp more efficient
Power density 227.7 Wp/m² 235.1 Wp/m² 7.4 Wp/m² higher
Rated power 615 Wp 635 Wp 20 W more power
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 (-0.300 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other.
615NBG-E1
20,634 kWh
635NBG-E1
21,306 kWh
Lifetime gap
672 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario 615NBG-E1 635NBG-E1
Standard test conditions 25 °C 100.0% of rated power 615 W 635 W
Cool, bright day 40 °C 95.5% of rated power 587 W 606 W
Typical summer roof 55 °C 91.0% of rated power 560 W 578 W
Hot roof 70 °C 86.5% of rated power 532 W 549 W
03

Full specification

Parameter 615NBG-E1 635NBG-E1 Difference
Power and efficiency
Rated power 615 Wp 635 Wp +20 W for 635NBG-E1
Module efficiency 22.77 % 23.51 % +0.74 pp for 635NBG-E1
Power density 227.7 Wp/m² 235.1 Wp/m² +7.4 Wp/m² for 635NBG-E1
Open-circuit voltage 48.88 V 49.68 V Effectively the same
Voltage at max power 40.60 V 41.16 V Effectively the same
Short-circuit current 16.02 A 16.26 A Effectively the same
Current at max power 15.15 A 15.43 A Effectively the same
Temperature
Temperature coefficient -0.300 %/°C -0.300 %/°C Same
Mechanical
Dimensions 2382x1134x30 mm 2382x1134x30 mm Same
Module area 2.701 m² 2.701 m² Same
Weight 32.4 kg 32.4 kg Same
Weight per kWp 52.7 kg/kWp 51.0 kg/kWp Effectively the same
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 132 132 Same
Bifacial Yes Yes Same
04

Against the whole database

14,005 panels
Efficiency
#3,073 vs #696
635NBG-E1 leads by 2,377 places
Power density
#3,077 vs #741
635NBG-E1 leads by 2,336 places
Heat behaviour
#6,093 vs #6,093
Tied - the same position in the database
Weight
#6,311 vs #4,372
635NBG-E1 leads by 1,939 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#2,365 vs #1,447
635NBG-E1 leads by 918 places
05

More useful comparisons

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06

Written summary

07

Questions about this pairing

Which panel is better: Renesola RS5J-615NBG-E1 or Renesola RS5J-635NBG-E1?
According to our database: Renesola RS5J-635NBG-E1 has higher module efficiency (23.51% vs 22.77%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Renesola RS5J-615NBG-E1 and Renesola RS5J-635NBG-E1?
Renesola RS5J-615NBG-E1 has a module efficiency of 22.77%, while Renesola RS5J-635NBG-E1 is 23.51%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Renesola RS5J-615NBG-E1 use vs Renesola RS5J-635NBG-E1?
Renesola RS5J-615NBG-E1 uses N-type cells; Renesola RS5J-635NBG-E1 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 RS5J-615NBG-E1 and Renesola RS5J-635NBG-E1?
Renesola RS5J-615NBG-E1 has a 30 years power warranty; Renesola RS5J-635NBG-E1 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 RS5J-615NBG-E1 and Renesola RS5J-635NBG-E1 bifacial panels?
Both Renesola RS5J-615NBG-E1 and Renesola RS5J-635NBG-E1 are bifacial - they capture reflected light from the ground, which can add 5-15% more annual energy on ground-mount or elevated rooftop installations with a light surface beneath.

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.