Navitas Solar NSM555-144 vs Navitas Solar NSM550-144
VS
The verdict
Identical on every published parameter
All 18 comparable parameters agree, with 1 more left out because at least one datasheet does not publish it. Two records this alike are usually one panel sold under two names, or two bins of the same production line - decide on price and on who you would rather buy from.
How alike are they
18
of 18 comparable
parameters are identical
parameters are identical
identical
differs
not published
01
0 of 18 parameters
What actually differs
Every comparable parameter agrees. The full specification is below.
02
What it means on a roof
Thirty years of production
A 1.0% first-year loss then 0.40% a year, assumed for both panels, at 1,200 kWh/kWp a year
Same temp coeff. for both panels (-0.360 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other.
NSM555-144
18,621 kWh
NSM550-144
18,454 kWh
Lifetime gap
167 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
NSM555-144
NSM550-144
Standard test conditions
25 °C
100.0% of rated power
555 W
550 W
Cool, bright day
40 °C
94.6% of rated power
525 W
520 W
Typical summer roof
55 °C
89.2% of rated power
495 W
491 W
Hot roof
70 °C
83.8% of rated power
465 W
461 W
03
Full specification
Parameter
NSM555-144
NSM550-144
Difference
Power and efficiency
Rated power
555 Wp
550 Wp
Effectively the same
Module efficiency
21.48 %
21.29 %
Effectively the same
Power density
214.8 Wp/m²
212.9 Wp/m²
Effectively the same
Open-circuit voltage
50.62 V
50.49 V
Effectively the same
Voltage at max power
42.91 V
42.68 V
Effectively the same
Short-circuit current
13.74 A
13.69 A
Effectively the same
Current at max power
12.93 A
12.88 A
Effectively the same
Temperature
Temperature coefficient
-0.360 %/°C
-0.360 %/°C
Same
Mechanical
Dimensions
2278x1134x35 mm
2278x1134x35 mm
Same
Module area
2.583 m²
2.583 m²
Same
Weight
29.0 kg
29.0 kg
Same
Weight per kWp
52.3 kg/kWp
52.7 kg/kWp
Effectively the same
Warranty and degradation
Product warranty
10 yrs
10 yrs
Same
Performance warranty
25 yrs
25 yrs
Same
Annual degradation
-
-
Neither datasheet publishes this
Technology
Cell technology
PERC
PERC
Same
Cell type
Monocrystalline
Monocrystalline
Same
Cell count
144
144
Same
Bifacial
No
No
Same
04
14,129 panels
Against the whole database
Efficiency
#8,217
vs
#8,776
NSM555-144 leads by 559 places
Power density
#8,099
vs
#8,563
NSM555-144 leads by 464 places
Heat behaviour
#12,425
vs
#12,425
Tied - the same position in the database
Weight
#5,753
vs
#6,427
NSM555-144 leads by 674 places
Warranty
#9,912
vs
#9,912
Tied - the same position in the database
Overall
#8,180
vs
#8,635
NSM555-144 leads by 455 places
05
Open the full database
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06
Written summary
Checking cache...
07
Questions about this pairing
Which panel is better: Navitas Solar NSM555-144 or Navitas Solar NSM550-144?
According to our database: Navitas Solar NSM555-144 has higher module efficiency (21.48% vs 21.29%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Navitas Solar NSM555-144 and Navitas Solar NSM550-144?
Navitas Solar NSM555-144 has a module efficiency of 21.48%, while Navitas Solar NSM550-144 is 21.29%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Navitas Solar NSM555-144 use vs Navitas Solar NSM550-144?
Navitas Solar NSM555-144 uses PERC cells; Navitas Solar NSM550-144 uses PERC. 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 Navitas Solar NSM555-144 and Navitas Solar NSM550-144?
Navitas Solar NSM555-144 has a 25 years power warranty; Navitas Solar NSM550-144 has a 25 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.
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.