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RS7-615N-E2 vs RS9-720NBG-E1 6 of 19 identical Swap Change panels

Renesola RS7-615N-E2 vs Renesola RS9-720NBG-E1

Renesola RS7-615N-E2
Renesola
RS7-615N-E2
615 Wp 22.00 % N-type
Open panel page Datasheet PDF
VS
Renesola
RS9-720NBG-E1
720 Wp 23.18 % N-type Bifacial
Open panel page Datasheet PDF
The verdict

RS9-720NBG-E1 leads on the differences that matter

The largest is module efficiency: 1.18 pp more efficient. 6 of 19 comparable parameters are identical.

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

What actually differs

13 of 19 parameters
Parameter RS7-615N-E2 RS9-720NBG-E1 Difference
Module efficiency 22.00 % 23.18 % 1.18 pp more efficient
Rated power 615 Wp 720 Wp 105 W more power
Power density 220.0 Wp/m² 231.8 Wp/m² 11.8 Wp/m² higher
Weight 30.0 kg 38.7 kg 8.7 kg lighter
Open-circuit voltage 56.65 V 49.40 V 7.25 V apart
Short-circuit current 13.80 A 18.49 A 4.69 A apart
Module area 2.795 m² 3.106 m² 0.311 m² apart
Weight per kWp 48.8 kg/kWp 53.8 kg/kWp 5.0 kg/kWp lighter
Voltage at max power 46.81 V 41.30 V 5.51 V apart
Current at max power 13.14 A 17.44 A 4.30 A apart
Cell count 156 132 24 cells apart
Bifacial No Yes No vs Yes
Dimensions 2465x1134x30 mm 2384x1303x33 mm 2465x1134x30 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
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.
RS7-615N-E2
20,634 kWh
RS9-720NBG-E1
24,157 kWh
Lifetime gap
3,523 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario RS7-615N-E2 RS9-720NBG-E1
Standard test conditions 25 °C 100.0% of rated power 615 W 720 W
Cool, bright day 40 °C 95.7% of rated power 588 W 689 W
Typical summer roof 55 °C 91.3% of rated power 561 W 657 W
Hot roof 70 °C 87.0% of rated power 535 W 626 W
03

Full specification

Parameter RS7-615N-E2 RS9-720NBG-E1 Difference
Power and efficiency
Rated power 615 Wp 720 Wp +105 W for RS9-720NBG-E1
Module efficiency 22.00 % 23.18 % +1.18 pp for RS9-720NBG-E1
Power density 220.0 Wp/m² 231.8 Wp/m² +11.8 Wp/m² for RS9-720NBG-E1
Open-circuit voltage 56.65 V 49.40 V 7.25 V apart
Voltage at max power 46.81 V 41.30 V 5.51 V apart
Short-circuit current 13.80 A 18.49 A 4.69 A apart
Current at max power 13.14 A 17.44 A 4.30 A apart
Temperature
Temperature coefficient -0.290 %/°C -0.290 %/°C Same
Mechanical
Dimensions 2465x1134x30 mm 2384x1303x33 mm 2465x1134x30 mm vs 2384x1303x33 mm
Module area 2.795 m² 3.106 m² 0.311 m² apart
Weight 30.0 kg 38.7 kg -8.7 kg for RS7-615N-E2
Weight per kWp 48.8 kg/kWp 53.8 kg/kWp -5.0 kg/kWp for RS7-615N-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 156 132 24 cells apart
Bifacial No Yes No vs Yes
04

Against the whole database

14,005 panels
Efficiency
#6,517 vs #1,424
RS9-720NBG-E1 leads by 5,093 places
Power density
#6,655 vs #1,347
RS9-720NBG-E1 leads by 5,308 places
Heat behaviour
#2,165 vs #2,165
Tied - the same position in the database
Weight
#2,460 vs #7,805
RS7-615N-E2 leads by 5,345 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#3,149 vs #362
RS9-720NBG-E1 leads by 2,787 places
05

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06

Written summary

07

Questions about this pairing

Which panel is better: Renesola RS7-615N-E2 or Renesola RS9-720NBG-E1?
According to our database: Renesola RS9-720NBG-E1 has higher module efficiency (23.18% vs 22.00%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Renesola RS7-615N-E2 and Renesola RS9-720NBG-E1?
Renesola RS7-615N-E2 has a module efficiency of 22.00%, while Renesola RS9-720NBG-E1 is 23.18%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Renesola RS7-615N-E2 use vs Renesola RS9-720NBG-E1?
Renesola RS7-615N-E2 uses N-type cells; Renesola RS9-720NBG-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 RS7-615N-E2 and Renesola RS9-720NBG-E1?
Renesola RS7-615N-E2 has a 30 years power warranty; Renesola RS9-720NBG-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 RS7-615N-E2 and Renesola RS9-720NBG-E1 bifacial panels?
Renesola RS9-720NBG-E1 is bifacial (captures light from both faces); Renesola RS7-615N-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.