Skip to main content
TN5-54H-380 vs SE6-66HBD-705 5 of 19 identical Swap Change panels

TN Solar TN5-54H-380 vs TN Solar SE6-66HBD-705

TN Solar
TN5-54H-380
380 Wp 19.49 % TOPCon
Open panel page Datasheet PDF
VS
TN Solar
SE6-66HBD-705
705 Wp 22.70 % HJT Bifacial
Open panel page Datasheet PDF
The verdict

SE6-66HBD-705 leads on the differences that matter

The largest is module efficiency: 3.21 pp more efficient. 5 of 19 comparable parameters are identical.

See all 14 differences
How alike are they
5 of 19 comparable
parameters are identical
identical differs
01

What actually differs

14 of 19 parameters
Parameter TN5-54H-380 SE6-66HBD-705 Difference
Module efficiency 19.49 % 22.70 % 3.21 pp more efficient
Temperature coefficient -0.300 %/°C -0.260 %/°C 0.040 %/°C better in heat
Rated power 380 Wp 705 Wp 325 W more power
Power density 194.6 Wp/m² 227.0 Wp/m² 32.4 Wp/m² higher
Weight 21.0 kg 38.7 kg 17.7 kg lighter
Open-circuit voltage 38.75 V 50.29 V 11.54 V apart
Short-circuit current 12.19 A 17.49 A 5.30 A apart
Module area 1.953 m² 3.106 m² 1.154 m² apart
Cell technology TOPCon HJT TOPCon vs HJT
Voltage at max power 32.48 V 42.25 V 9.77 V apart
Current at max power 11.70 A 16.69 A 4.99 A apart
Cell count 108 132 24 cells apart
Bifacial No Yes No vs Yes
Dimensions 1722x1134x30 mm 2384x1303x35 mm 1722x1134x30 mm vs 2384x1303x35 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
TN5-54H-380
12,750 kWh
SE6-66HBD-705
23,728 kWh
Lifetime gap
10,978 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario TN5-54H-380 SE6-66HBD-705
Standard test conditions 25 °C 100.0% of rated power 380 W 705 W
Cool, bright day 40 °C 95.5% of rated power 363 W 678 W
Typical summer roof 55 °C 91.0% of rated power 346 W 650 W
Hot roof 70 °C 86.5% of rated power 329 W 623 W
03

Full specification

Parameter TN5-54H-380 SE6-66HBD-705 Difference
Power and efficiency
Rated power 380 Wp 705 Wp +325 W for SE6-66HBD-705
Module efficiency 19.49 % 22.70 % +3.21 pp for SE6-66HBD-705
Power density 194.6 Wp/m² 227.0 Wp/m² +32.4 Wp/m² for SE6-66HBD-705
Open-circuit voltage 38.75 V 50.29 V 11.54 V apart
Voltage at max power 32.48 V 42.25 V 9.77 V apart
Short-circuit current 12.19 A 17.49 A 5.30 A apart
Current at max power 11.70 A 16.69 A 4.99 A apart
Temperature
Temperature coefficient -0.300 %/°C -0.260 %/°C +0.040 %/°C for SE6-66HBD-705
Mechanical
Dimensions 1722x1134x30 mm 2384x1303x35 mm 1722x1134x30 mm vs 2384x1303x35 mm
Module area 1.953 m² 3.106 m² 1.154 m² apart
Weight 21.0 kg 38.7 kg -17.7 kg for TN5-54H-380
Weight per kWp 55.3 kg/kWp 54.9 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 0.38 %/yr Effectively the same
Technology
Cell technology TOPCon HJT TOPCon vs HJT
Cell type Monocrystalline Monocrystalline Same
Cell count 108 132 24 cells apart
Bifacial No Yes No vs Yes
04

Against the whole database

14,005 panels
Efficiency
#12,702 vs #3,307
SE6-66HBD-705 leads by 9,395 places
Power density
#12,694 vs #3,361
SE6-66HBD-705 leads by 9,333 places
Heat behaviour
#6,093 vs #511
SE6-66HBD-705 leads by 5,582 places
Weight
#9,696 vs #9,275
SE6-66HBD-705 leads by 421 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#11,187 vs #173
SE6-66HBD-705 leads by 11,014 places
05

More useful comparisons

Open the full database
Same series, other bin
TN Solar
TN Solar TN5-54H-380 vs TN Solar TN5-54H-390
3 differences, the largest is module efficiency
Same series, other bin
TN Solar
TN Solar TN5-54H-380 vs TN Solar TN5-54H-385
One difference: module efficiency
Same series, other bin
TN Solar
TN Solar TN5-54H-380 vs TN Solar TN5-54H-375
One difference: module efficiency
Same series, other bin
TN Solar
TN Solar TN5-54H-380 vs TN Solar TN5-54H-370
3 differences, the largest is module efficiency
Same series, other bin
TN Solar
TN Solar SE6-66HBD-705 vs TN Solar SE6-66HBD-715
3 differences, the largest is module efficiency
Same series, other bin
TN Solar
TN Solar SE6-66HBD-705 vs TN Solar SE6-66HBD-710
The same specification on paper
06

Written summary

07

Questions about this pairing

Which panel is better: TN Solar TN5-54H-380 or TN Solar SE6-66HBD-705?
According to our database: TN Solar SE6-66HBD-705 has higher module efficiency (22.70% vs 19.49%); TN Solar SE6-66HBD-705 tolerates heat better (temp coeff -0.260%/°C vs -0.300%/°C). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of TN Solar TN5-54H-380 and TN Solar SE6-66HBD-705?
TN Solar TN5-54H-380 has a module efficiency of 19.49%, while TN Solar SE6-66HBD-705 is 22.70%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does TN Solar TN5-54H-380 use vs TN Solar SE6-66HBD-705?
TN Solar TN5-54H-380 uses TOPCon cells; TN Solar SE6-66HBD-705 uses HJT. 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-380 and TN Solar SE6-66HBD-705?
TN Solar TN5-54H-380 has a 30 years power warranty; TN Solar SE6-66HBD-705 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 TN Solar TN5-54H-380 and TN Solar SE6-66HBD-705 bifacial panels?
TN Solar SE6-66HBD-705 is bifacial (captures light from both faces); TN Solar TN5-54H-380 is monofacial. Bifacial panels work best on ground mounts or raised structures with a light-coloured surface underneath.

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.