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390 vs 385 18 of 19 identical Swap Change panels

TN Solar TN5-54H-390 vs TN Solar TN5-54H-385

TN Solar
TN5-54H-390
390 Wp 19.97 % TOPCon
Open panel page Datasheet PDF
VS
TN Solar
TN5-54H-385
385 Wp 19.72 % TOPCon
Open panel page Datasheet PDF
The verdict

390 leads on the differences that matter

The largest is module efficiency: 0.25 pp more efficient. 18 of 19 comparable parameters are identical.

See the one difference
How alike are they
18 of 19 comparable
parameters are identical
identical differs
01

What actually differs

1 of 19 parameters
Parameter 390 385 Difference
Module efficiency 19.97 % 19.72 % 0.25 pp more efficient
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.
390
13,085 kWh
385
12,918 kWh
Lifetime gap
167 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario 390 385
Standard test conditions 25 °C 100.0% of rated power 390 W 385 W
Cool, bright day 40 °C 95.5% of rated power 372 W 368 W
Typical summer roof 55 °C 91.0% of rated power 355 W 350 W
Hot roof 70 °C 86.5% of rated power 337 W 333 W
03

Full specification

Parameter 390 385 Difference
Power and efficiency
Rated power 390 Wp 385 Wp Effectively the same
Module efficiency 19.97 % 19.72 % +0.25 pp for 390
Power density 199.7 Wp/m² 197.2 Wp/m² Effectively the same
Open-circuit voltage 38.92 V 38.83 V Effectively the same
Voltage at max power 32.56 V 32.52 V Effectively the same
Short-circuit current 12.43 A 12.31 A Effectively the same
Current at max power 11.98 A 11.84 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 53.8 kg/kWp 54.5 kg/kWp Effectively the same
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

Against the whole database

14,005 panels
Efficiency
#12,302 vs #12,501
390 leads by 199 places
Power density
#12,255 vs #12,493
390 leads by 238 places
Heat behaviour
#6,093 vs #6,093
Tied - the same position in the database
Weight
#7,897 vs #8,872
390 leads by 975 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#10,672 vs #10,920
390 leads by 248 places
05

More useful comparisons

Open the full database
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TN Solar TN5-54H-390 vs TN Solar TN5-54H-380
3 differences, the largest is module efficiency
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TN Solar TN5-54H-390 vs TN Solar TN5-54H-375
4 differences, the largest is module efficiency
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TN Solar TN5-54H-390 vs TN Solar TN5-54H-370
5 differences, the largest is module efficiency
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TN Solar TN5-54H-390 vs TN Solar SE6-66HBD-715
14 differences, the largest is module efficiency
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TN Solar TN5-54H-390 vs TN Solar SE6-66HBD-710
14 differences, the largest is module efficiency
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TN Solar TN5-54H-390 vs TN Solar SE6-66HBD-705
14 differences, the largest is module efficiency
06

Written summary

07

Questions about this pairing

Which panel is better: TN Solar TN5-54H-390 or TN Solar TN5-54H-385?
According to our database: TN Solar TN5-54H-390 has higher module efficiency (19.97% vs 19.72%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of TN Solar TN5-54H-390 and TN Solar TN5-54H-385?
TN Solar TN5-54H-390 has a module efficiency of 19.97%, while TN Solar TN5-54H-385 is 19.72%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does TN Solar TN5-54H-390 use vs TN Solar TN5-54H-385?
TN Solar TN5-54H-390 uses TOPCon cells; TN Solar TN5-54H-385 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-390 and TN Solar TN5-54H-385?
TN Solar TN5-54H-390 has a 30 years power warranty; TN Solar TN5-54H-385 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.