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715 vs 705 16 of 19 identical Swap Change panels

TN Solar SE6-66HBD-715 vs TN Solar SE6-66HBD-705

TN Solar
SE6-66HBD-715
715 Wp 23.02 % HJT Bifacial
Open panel page Datasheet PDF
VS
TN Solar
SE6-66HBD-705
705 Wp 22.70 % HJT Bifacial
Open panel page Datasheet PDF
The verdict

715 leads on the differences that matter

The largest is module efficiency: 0.32 pp more efficient. 16 of 19 comparable parameters are identical.

See all 3 differences
How alike are they
16 of 19 comparable
parameters are identical
identical differs
01

What actually differs

3 of 19 parameters
Parameter 715 705 Difference
Module efficiency 23.02 % 22.70 % 0.32 pp more efficient
Power density 230.2 Wp/m² 227.0 Wp/m² 3.2 Wp/m² higher
Rated power 715 Wp 705 Wp 10 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.
715
24,064 kWh
705
23,728 kWh
Lifetime gap
336 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario 715 705
Standard test conditions 25 °C 100.0% of rated power 715 W 705 W
Cool, bright day 40 °C 96.1% of rated power 687 W 678 W
Typical summer roof 55 °C 92.2% of rated power 659 W 650 W
Hot roof 70 °C 88.3% of rated power 631 W 623 W
03

Full specification

Parameter 715 705 Difference
Power and efficiency
Rated power 715 Wp 705 Wp +10 W for 715
Module efficiency 23.02 % 22.70 % +0.32 pp for 715
Power density 230.2 Wp/m² 227.0 Wp/m² +3.2 Wp/m² for 715
Open-circuit voltage 50.59 V 50.29 V Effectively the same
Voltage at max power 42.54 V 42.25 V Effectively the same
Short-circuit current 17.61 A 17.49 A Effectively the same
Current at max power 16.81 A 16.69 A Effectively the same
Temperature
Temperature coefficient -0.260 %/°C -0.260 %/°C Same
Mechanical
Dimensions 2384x1303x35 mm 2384x1303x35 mm Same
Module area 3.106 m² 3.106 m² Same
Weight 38.7 kg 38.7 kg Same
Weight per kWp 54.1 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 0.38 %/yr 0.38 %/yr Same
Technology
Cell technology HJT HJT Same
Cell type Monocrystalline Monocrystalline Same
Cell count 132 132 Same
Bifacial Yes Yes Same
04

Against the whole database

14,005 panels
Efficiency
#1,797 vs #3,307
715 leads by 1,510 places
Power density
#2,018 vs #3,361
715 leads by 1,343 places
Heat behaviour
#511 vs #511
Tied - the same position in the database
Weight
#8,339 vs #9,275
715 leads by 936 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#112 vs #173
715 leads by 61 places
05

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06

Written summary

07

Questions about this pairing

Which panel is better: TN Solar SE6-66HBD-715 or TN Solar SE6-66HBD-705?
According to our database: TN Solar SE6-66HBD-715 has higher module efficiency (23.02% vs 22.70%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of TN Solar SE6-66HBD-715 and TN Solar SE6-66HBD-705?
TN Solar SE6-66HBD-715 has a module efficiency of 23.02%, 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 SE6-66HBD-715 use vs TN Solar SE6-66HBD-705?
TN Solar SE6-66HBD-715 uses HJT 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 SE6-66HBD-715 and TN Solar SE6-66HBD-705?
TN Solar SE6-66HBD-715 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 SE6-66HBD-715 and TN Solar SE6-66HBD-705 bifacial panels?
Both TN Solar SE6-66HBD-715 and TN Solar SE6-66HBD-705 are bifacial - they capture reflected light from the ground, which can add 5-15% more annual energy on ground-mount or elevated rooftop installations with a light surface beneath.

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.