EGing PV EG-675NT66-HU/BF-DG vs EGing PV EG-685NT66-HU/BF-DG
VS
The verdict
685NT66-HU/BF-DG leads on the differences that matter
The largest is module efficiency: 0.33 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
675NT66-HU/BF-DG
685NT66-HU/BF-DG
Difference
Module efficiency
21.72 %
22.05 %
0.33 pp more efficient
Power density
217.3 Wp/m²
220.5 Wp/m²
3.2 Wp/m² higher
Rated power
675 Wp
685 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 (-0.300 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other.
675NT66-HU/BF-DG
22,648 kWh
685NT66-HU/BF-DG
22,983 kWh
Lifetime gap
335 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
675NT66-HU/BF-DG
685NT66-HU/BF-DG
Standard test conditions
25 °C
100.0% of rated power
675 W
685 W
Cool, bright day
40 °C
95.5% of rated power
645 W
654 W
Typical summer roof
55 °C
91.0% of rated power
614 W
623 W
Hot roof
70 °C
86.5% of rated power
584 W
593 W
03
Full specification
Parameter
675NT66-HU/BF-DG
685NT66-HU/BF-DG
Difference
Power and efficiency
Rated power
675 Wp
685 Wp
+10 W for 685NT66-HU/BF-DG
Module efficiency
21.72 %
22.05 %
+0.33 pp for 685NT66-HU/BF-DG
Power density
217.3 Wp/m²
220.5 Wp/m²
+3.2 Wp/m² for 685NT66-HU/BF-DG
Open-circuit voltage
47.22 V
47.64 V
Effectively the same
Voltage at max power
39.43 V
39.85 V
Effectively the same
Short-circuit current
18.14 A
18.22 A
Effectively the same
Current at max power
17.12 A
17.19 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
38.3 kg
38.3 kg
Same
Weight per kWp
56.7 kg/kWp
55.9 kg/kWp
Effectively the same
Warranty and degradation
Product warranty
12 yrs
12 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
#7,399
vs
#6,233
685NT66-HU/BF-DG leads by 1,166 places
Power density
#7,349
vs
#6,208
685NT66-HU/BF-DG leads by 1,141 places
Heat behaviour
#6,093
vs
#6,093
Tied - the same position in the database
Weight
#10,836
vs
#10,276
685NT66-HU/BF-DG leads by 560 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#2,173
vs
#1,726
685NT66-HU/BF-DG leads by 447 places
05
Open the full database
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06
Written summary
Checking cache...
07
Questions about this pairing
Which panel is better: EGing PV EG-675NT66-HU/BF-DG or EGing PV EG-685NT66-HU/BF-DG?
According to our database: EGing PV EG-685NT66-HU/BF-DG has higher module efficiency (22.05% vs 21.72%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of EGing PV EG-675NT66-HU/BF-DG and EGing PV EG-685NT66-HU/BF-DG?
EGing PV EG-675NT66-HU/BF-DG has a module efficiency of 21.72%, while EGing PV EG-685NT66-HU/BF-DG is 22.05%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does EGing PV EG-675NT66-HU/BF-DG use vs EGing PV EG-685NT66-HU/BF-DG?
EGing PV EG-675NT66-HU/BF-DG uses TOPCon cells; EGing PV EG-685NT66-HU/BF-DG 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 EGing PV EG-675NT66-HU/BF-DG and EGing PV EG-685NT66-HU/BF-DG?
EGing PV EG-675NT66-HU/BF-DG has a 30 years power warranty; EGing PV EG-685NT66-HU/BF-DG 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 EGing PV EG-675NT66-HU/BF-DG and EGing PV EG-685NT66-HU/BF-DG bifacial panels?
Both EGing PV EG-675NT66-HU/BF-DG and EGing PV EG-685NT66-HU/BF-DG 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.
Shop prices: See 3 EGing PV offers
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.