LEDVANCE M690N66UB-SF-F7 vs LEDVANCE M705N66UB-SF-F7
VS
The verdict
M705N66UB-SF-F7 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
M690N66UB-SF-F7
M705N66UB-SF-F7
Difference
Module efficiency
22.21 %
22.70 %
0.49 pp more efficient
Power density
222.1 Wp/m²
227.0 Wp/m²
4.8 Wp/m² higher
Rated power
690 Wp
705 Wp
15 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 (-0.300 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other.
M690N66UB-SF-F7
23,151 kWh
M705N66UB-SF-F7
23,654 kWh
Lifetime gap
503 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
M690N66UB-SF-F7
M705N66UB-SF-F7
Standard test conditions
25 °C
100.0% of rated power
690 W
705 W
Cool, bright day
40 °C
95.5% of rated power
659 W
673 W
Typical summer roof
55 °C
91.0% of rated power
628 W
642 W
Hot roof
70 °C
86.5% of rated power
597 W
610 W
03
Full specification
Parameter
M690N66UB-SF-F7
M705N66UB-SF-F7
Difference
Power and efficiency
Rated power
690 Wp
705 Wp
+15 W for M705N66UB-SF-F7
Module efficiency
22.21 %
22.70 %
+0.49 pp for M705N66UB-SF-F7
Power density
222.1 Wp/m²
227.0 Wp/m²
+4.8 Wp/m² for M705N66UB-SF-F7
Open-circuit voltage
47.80 V
48.20 V
Effectively the same
Voltage at max power
40.10 V
40.70 V
Effectively the same
Short-circuit current
18.24 A
18.36 A
Effectively the same
Current at max power
17.21 A
17.33 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
50.0 kg/kWp
48.9 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
0.40 %/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
#5,754
vs
#3,307
M705N66UB-SF-F7 leads by 2,447 places
Power density
#5,734
vs
#3,361
M705N66UB-SF-F7 leads by 2,373 places
Heat behaviour
#6,093
vs
#6,093
Tied - the same position in the database
Weight
#3,575
vs
#2,611
M705N66UB-SF-F7 leads by 964 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#370
vs
#166
M705N66UB-SF-F7 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 M690N66UB-SF-F7 or LEDVANCE M705N66UB-SF-F7?
According to our database: LEDVANCE M705N66UB-SF-F7 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 M690N66UB-SF-F7 and LEDVANCE M705N66UB-SF-F7?
LEDVANCE M690N66UB-SF-F7 has a module efficiency of 22.21%, while LEDVANCE M705N66UB-SF-F7 is 22.70%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does LEDVANCE M690N66UB-SF-F7 use vs LEDVANCE M705N66UB-SF-F7?
LEDVANCE M690N66UB-SF-F7 uses TOPCon cells; LEDVANCE M705N66UB-SF-F7 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 M690N66UB-SF-F7 and LEDVANCE M705N66UB-SF-F7?
LEDVANCE M690N66UB-SF-F7 has a 30 years power warranty; LEDVANCE M705N66UB-SF-F7 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 M690N66UB-SF-F7 and LEDVANCE M705N66UB-SF-F7 bifacial panels?
Both LEDVANCE M690N66UB-SF-F7 and LEDVANCE M705N66UB-SF-F7 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.