LEDVANCE M685~705N66UB-SF-F7-705 vs LEDVANCE M685~705N66UB-SF-F7-690
VS
The verdict
705 leads on the differences that matter
The largest is module efficiency: 0.49 pp more efficient. 16 of 19 comparable parameters are identical.
See all 3 differencesHow alike are they
16
of 19 comparable
parameters are identical
parameters are identical
identical
differs
01
3 of 19 parameters
What actually differs
Parameter
705
690
Difference
Module efficiency
22.70 %
22.21 %
0.49 pp more efficient
Power density
227.0 Wp/m²
222.1 Wp/m²
4.8 Wp/m² higher
Rated power
705 Wp
690 Wp
15 W more power
02
What it means on a roof
Thirty years of production
Declared annual degradation, with a 1.0% first-year loss assumed for both panels because at least one datasheet omits it, 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.
705
23,654 kWh
690
23,151 kWh
Lifetime gap
503 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
705
690
Standard test conditions
25 °C
100.0% of rated power
705 W
690 W
Cool, bright day
40 °C
95.5% of rated power
673 W
659 W
Typical summer roof
55 °C
91.0% of rated power
642 W
628 W
Hot roof
70 °C
86.5% of rated power
610 W
597 W
03
Full specification
Parameter
705
690
Difference
Power and efficiency
Rated power
705 Wp
690 Wp
+15 W for 705
Module efficiency
22.70 %
22.21 %
+0.49 pp for 705
Power density
227.0 Wp/m²
222.1 Wp/m²
+4.8 Wp/m² for 705
Open-circuit voltage
48.20 V
47.80 V
Effectively the same
Voltage at max power
40.70 V
40.10 V
Effectively the same
Short-circuit current
18.36 A
18.24 A
Effectively the same
Current at max power
17.33 A
17.21 A
Effectively the same
Temperature
Temperature coefficient
-0.300 %/°C
-0.300 %/°C
Same
Mechanical
Dimensions
2384x1303x35 mm
2384x1303x35 mm
Same
Module area
3.106 m²
3.106 m²
Same
Weight
34.5 kg
34.5 kg
Same
Weight per kWp
48.9 kg/kWp
50.0 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
132
132
Same
Bifacial
Yes
Yes
Same
04
14,005 panels
Against the whole database
Efficiency
#3,307
vs
#5,754
705 leads by 2,447 places
Power density
#3,361
vs
#5,734
705 leads by 2,373 places
Heat behaviour
#6,093
vs
#6,093
Tied - the same position in the database
Weight
#2,611
vs
#3,575
705 leads by 964 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#166
vs
#370
705 leads by 204 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: LEDVANCE M685~705N66UB-SF-F7-705 or LEDVANCE M685~705N66UB-SF-F7-690?
According to our database: LEDVANCE M685~705N66UB-SF-F7-705 has higher module efficiency (22.70% vs 22.21%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of LEDVANCE M685~705N66UB-SF-F7-705 and LEDVANCE M685~705N66UB-SF-F7-690?
LEDVANCE M685~705N66UB-SF-F7-705 has a module efficiency of 22.70%, while LEDVANCE M685~705N66UB-SF-F7-690 is 22.21%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does LEDVANCE M685~705N66UB-SF-F7-705 use vs LEDVANCE M685~705N66UB-SF-F7-690?
LEDVANCE M685~705N66UB-SF-F7-705 uses TOPCon cells; LEDVANCE M685~705N66UB-SF-F7-690 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 LEDVANCE M685~705N66UB-SF-F7-705 and LEDVANCE M685~705N66UB-SF-F7-690?
LEDVANCE M685~705N66UB-SF-F7-705 has a 30 years power warranty; LEDVANCE M685~705N66UB-SF-F7-690 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 LEDVANCE M685~705N66UB-SF-F7-705 and LEDVANCE M685~705N66UB-SF-F7-690 bifacial panels?
Both LEDVANCE M685~705N66UB-SF-F7-705 and LEDVANCE M685~705N66UB-SF-F7-690 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.
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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.