Longi Solar LR7-54HVB-475M vs Longi Solar LR7-54HVB-490M
VS
The verdict
490M leads on the differences that matter
The largest is module efficiency: 0.70 pp more efficient. 15 of 18 comparable parameters are identical, with 1 more left out because at least one datasheet does not publish it.
See all 3 differencesHow alike are they
15
of 18 comparable
parameters are identical
parameters are identical
identical
differs
not published
01
3 of 18 parameters
What actually differs
Parameter
475M
490M
Difference
Module efficiency
23.30 %
24.00 %
0.70 pp more efficient
Power density
232.7 Wp/m²
240.1 Wp/m²
7.3 Wp/m² higher
Rated power
475 Wp
490 Wp
15 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 (-0.260 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other.
475M
16,061 kWh
490M
16,568 kWh
Lifetime gap
507 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
475M
490M
Standard test conditions
25 °C
100.0% of rated power
475 W
490 W
Cool, bright day
40 °C
96.1% of rated power
456 W
471 W
Typical summer roof
55 °C
92.2% of rated power
438 W
452 W
Hot roof
70 °C
88.3% of rated power
419 W
433 W
03
Full specification
Parameter
475M
490M
Difference
Power and efficiency
Rated power
475 Wp
490 Wp
+15 W for 490M
Module efficiency
23.30 %
24.00 %
+0.70 pp for 490M
Power density
232.7 Wp/m²
240.1 Wp/m²
+7.3 Wp/m² for 490M
Open-circuit voltage
40.18 V
40.52 V
Effectively the same
Voltage at max power
33.16 V
33.51 V
Effectively the same
Short-circuit current
15.03 A
15.33 A
Effectively the same
Current at max power
14.33 A
14.63 A
Effectively the same
Temperature
Temperature coefficient
-0.260 %/°C
-0.260 %/°C
Same
Mechanical
Dimensions
1800x1134x30 mm
1800x1134x30 mm
Same
Module area
2.041 m²
2.041 m²
Same
Weight
21.6 kg
21.6 kg
Same
Weight per kWp
45.5 kg/kWp
44.1 kg/kWp
Effectively the same
Warranty and degradation
Product warranty
-
-
Neither datasheet publishes this
Performance warranty
30 yrs
30 yrs
Same
Annual degradation
0.35 %/yr
0.35 %/yr
Same
Technology
Cell technology
N-type
N-type
Same
Cell type
Monocrystalline
Monocrystalline
Same
Cell count
108
108
Same
Bifacial
No
No
Same
04
14,005 panels
Against the whole database
Efficiency
#1,017
vs
#303
490M leads by 714 places
Power density
#1,189
vs
#313
490M leads by 876 places
Heat behaviour
#511
vs
#511
Tied - the same position in the database
Weight
#743
vs
#377
490M leads by 366 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#9,535
vs
#8,306
490M leads by 1,229 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: Longi Solar LR7-54HVB-475M or Longi Solar LR7-54HVB-490M?
According to our database: Longi Solar LR7-54HVB-490M has higher module efficiency (24.00% vs 23.30%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Longi Solar LR7-54HVB-475M and Longi Solar LR7-54HVB-490M?
Longi Solar LR7-54HVB-475M has a module efficiency of 23.30%, while Longi Solar LR7-54HVB-490M is 24.00%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Longi Solar LR7-54HVB-475M use vs Longi Solar LR7-54HVB-490M?
Longi Solar LR7-54HVB-475M uses N-type cells; Longi Solar LR7-54HVB-490M 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 Longi Solar LR7-54HVB-475M and Longi Solar LR7-54HVB-490M?
Longi Solar LR7-54HVB-475M has a 30 years power warranty; Longi Solar LR7-54HVB-490M 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.
Shop prices: See 174 Longi Solar offers
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.