Renesola RS4-500NBG-E1 vs Renesola RS9-720NBG-E1
VS
The verdict
RS9-720NBG-E1 leads on the differences that matter
The largest is rated power: 220 W more power. 9 of 19 comparable parameters are identical.
See all 10 differencesHow alike are they
9
of 19 comparable
parameters are identical
parameters are identical
identical
differs
01
10 of 19 parameters
What actually differs
Parameter
RS4-500NBG-E1
RS9-720NBG-E1
Difference
Rated power
500 Wp
720 Wp
220 W more power
Weight
28.0 kg
38.7 kg
10.7 kg lighter
Open-circuit voltage
45.18 V
49.40 V
4.22 V apart
Short-circuit current
14.01 A
18.49 A
4.48 A apart
Module area
2.158 m²
3.106 m²
0.948 m² apart
Voltage at max power
37.17 V
41.30 V
4.13 V apart
Current at max power
13.45 A
17.44 A
3.99 A apart
Cell count
120
132
12 cells apart
Weight per kWp
56.0 kg/kWp
53.8 kg/kWp
2.2 kg/kWp lighter
Dimensions
1903x1134x30 mm
2384x1303x33 mm
1903x1134x30 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.
RS4-500NBG-E1
16,776 kWh
RS9-720NBG-E1
24,157 kWh
Lifetime gap
7,381 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
RS4-500NBG-E1
RS9-720NBG-E1
Standard test conditions
25 °C
100.0% of rated power
500 W
720 W
Cool, bright day
40 °C
95.7% of rated power
478 W
689 W
Typical summer roof
55 °C
91.3% of rated power
457 W
657 W
Hot roof
70 °C
87.0% of rated power
435 W
626 W
03
Full specification
Parameter
RS4-500NBG-E1
RS9-720NBG-E1
Difference
Power and efficiency
Rated power
500 Wp
720 Wp
+220 W for RS9-720NBG-E1
Module efficiency
23.17 %
23.18 %
Effectively the same
Power density
231.7 Wp/m²
231.8 Wp/m²
Effectively the same
Open-circuit voltage
45.18 V
49.40 V
4.22 V apart
Voltage at max power
37.17 V
41.30 V
4.13 V apart
Short-circuit current
14.01 A
18.49 A
4.48 A apart
Current at max power
13.45 A
17.44 A
3.99 A apart
Temperature
Temperature coefficient
-0.290 %/°C
-0.290 %/°C
Same
Mechanical
Dimensions
1903x1134x30 mm
2384x1303x33 mm
1903x1134x30 mm vs 2384x1303x33 mm
Module area
2.158 m²
3.106 m²
0.948 m² apart
Weight
28.0 kg
38.7 kg
-10.7 kg for RS4-500NBG-E1
Weight per kWp
56.0 kg/kWp
53.8 kg/kWp
-2.2 kg/kWp for RS9-720NBG-E1
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
120
132
12 cells apart
Bifacial
Yes
Yes
Same
04
14,129 panels
Against the whole database
Efficiency
#1,518
vs
#1,468
RS9-720NBG-E1 leads by 50 places
Power density
#1,507
vs
#1,390
RS9-720NBG-E1 leads by 117 places
Heat behaviour
#2,220
vs
#2,220
Tied - the same position in the database
Weight
#10,402
vs
#7,881
RS9-720NBG-E1 leads by 2,521 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#5,907
vs
#366
RS9-720NBG-E1 leads by 5,541 places
05
Open the full database
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06
Written summary
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07
Questions about this pairing
Which panel is better: Renesola RS4-500NBG-E1 or Renesola RS9-720NBG-E1?
According to our database: Renesola RS9-720NBG-E1 has higher module efficiency (23.18% vs 23.17%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Renesola RS4-500NBG-E1 and Renesola RS9-720NBG-E1?
Renesola RS4-500NBG-E1 has a module efficiency of 23.17%, 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 RS4-500NBG-E1 use vs Renesola RS9-720NBG-E1?
Renesola RS4-500NBG-E1 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 RS4-500NBG-E1 and Renesola RS9-720NBG-E1?
Renesola RS4-500NBG-E1 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 RS4-500NBG-E1 and Renesola RS9-720NBG-E1 bifacial panels?
Both Renesola RS4-500NBG-E1 and Renesola RS9-720NBG-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.