TN Solar TN5-54H-375 vs TN Solar TN5-54H-390
VS
The verdict
390 leads on the differences that matter
The largest is module efficiency: 0.77 pp more efficient. 15 of 19 comparable parameters are identical.
See all 4 differencesHow alike are they
15
of 19 comparable
parameters are identical
parameters are identical
identical
differs
01
4 of 19 parameters
What actually differs
Parameter
375
390
Difference
Module efficiency
19.20 %
19.97 %
0.77 pp more efficient
Power density
192.0 Wp/m²
199.7 Wp/m²
7.7 Wp/m² higher
Rated power
375 Wp
390 Wp
15 W more power
Weight per kWp
56.0 kg/kWp
53.8 kg/kWp
2.2 kg/kWp lighter
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.
375
12,582 kWh
390
13,085 kWh
Lifetime gap
503 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
375
390
Standard test conditions
25 °C
100.0% of rated power
375 W
390 W
Cool, bright day
40 °C
95.5% of rated power
358 W
372 W
Typical summer roof
55 °C
91.0% of rated power
341 W
355 W
Hot roof
70 °C
86.5% of rated power
324 W
337 W
03
Full specification
Parameter
375
390
Difference
Power and efficiency
Rated power
375 Wp
390 Wp
+15 W for 390
Module efficiency
19.20 %
19.97 %
+0.77 pp for 390
Power density
192.0 Wp/m²
199.7 Wp/m²
+7.7 Wp/m² for 390
Open-circuit voltage
38.66 V
38.92 V
Effectively the same
Voltage at max power
32.44 V
32.56 V
Effectively the same
Short-circuit current
12.07 A
12.43 A
Effectively the same
Current at max power
11.56 A
11.98 A
Effectively the same
Temperature
Temperature coefficient
-0.300 %/°C
-0.300 %/°C
Same
Mechanical
Dimensions
1722x1134x30 mm
1722x1134x30 mm
Same
Module area
1.953 m²
1.953 m²
Same
Weight
21.0 kg
21.0 kg
Same
Weight per kWp
56.0 kg/kWp
53.8 kg/kWp
-2.2 kg/kWp for 390
Warranty and degradation
Product warranty
25 yrs
25 yrs
Same
Performance warranty
30 yrs
30 yrs
Same
Annual degradation
0.40 %/yr
0.40 %/yr
Same
Technology
Cell technology
TOPCon
TOPCon
Same
Cell type
Monocrystalline
Monocrystalline
Same
Cell count
108
108
Same
Bifacial
No
No
Same
04
14,005 panels
Against the whole database
Efficiency
#12,855
vs
#12,302
390 leads by 553 places
Power density
#12,844
vs
#12,255
390 leads by 589 places
Heat behaviour
#6,093
vs
#6,093
Tied - the same position in the database
Weight
#10,317
vs
#7,897
390 leads by 2,420 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#11,458
vs
#10,672
390 leads by 786 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: TN Solar TN5-54H-375 or TN Solar TN5-54H-390?
According to our database: TN Solar TN5-54H-390 has higher module efficiency (19.97% vs 19.20%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of TN Solar TN5-54H-375 and TN Solar TN5-54H-390?
TN Solar TN5-54H-375 has a module efficiency of 19.20%, while TN Solar TN5-54H-390 is 19.97%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does TN Solar TN5-54H-375 use vs TN Solar TN5-54H-390?
TN Solar TN5-54H-375 uses TOPCon cells; TN Solar TN5-54H-390 uses TOPCon. 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 TN Solar TN5-54H-375 and TN Solar TN5-54H-390?
TN Solar TN5-54H-375 has a 30 years power warranty; TN Solar TN5-54H-390 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.
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.