EGing PV EG-610NT60-HU/BF-DG vs EGing PV EG-665NT66-HU/BF-DG
VS
The verdict
665NT66-HU/BF-DG leads on the differences that matter
The largest is rated power: 55 W more power. 12 of 19 comparable parameters are identical.
See all 7 differencesHow alike are they
12
of 19 comparable
parameters are identical
parameters are identical
identical
differs
01
7 of 19 parameters
What actually differs
Parameter
610NT60-HU/BF-DG
665NT66-HU/BF-DG
Difference
Rated power
610 Wp
665 Wp
55 W more power
Weight
35.0 kg
38.3 kg
3.3 kg lighter
Module area
2.830 m²
3.106 m²
0.276 m² apart
Open-circuit voltage
42.83 V
46.78 V
3.95 V apart
Cell count
120
132
12 cells apart
Voltage at max power
35.74 V
38.99 V
3.25 V apart
Dimensions
2172x1303x35 mm
2384x1303x35 mm
2172x1303x35 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
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.
610NT60-HU/BF-DG
20,467 kWh
665NT66-HU/BF-DG
22,312 kWh
Lifetime gap
1,845 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
610NT60-HU/BF-DG
665NT66-HU/BF-DG
Standard test conditions
25 °C
100.0% of rated power
610 W
665 W
Cool, bright day
40 °C
95.5% of rated power
583 W
635 W
Typical summer roof
55 °C
91.0% of rated power
555 W
605 W
Hot roof
70 °C
86.5% of rated power
528 W
575 W
03
Full specification
Parameter
610NT60-HU/BF-DG
665NT66-HU/BF-DG
Difference
Power and efficiency
Rated power
610 Wp
665 Wp
+55 W for 665NT66-HU/BF-DG
Module efficiency
21.55 %
21.40 %
Effectively the same
Power density
215.5 Wp/m²
214.1 Wp/m²
Effectively the same
Open-circuit voltage
42.83 V
46.78 V
3.95 V apart
Voltage at max power
35.74 V
38.99 V
3.25 V apart
Short-circuit current
18.08 A
18.07 A
Effectively the same
Current at max power
17.07 A
17.06 A
Effectively the same
Temperature
Temperature coefficient
-0.300 %/°C
-0.300 %/°C
Same
Mechanical
Dimensions
2172x1303x35 mm
2384x1303x35 mm
2172x1303x35 mm vs 2384x1303x35 mm
Module area
2.830 m²
3.106 m²
0.276 m² apart
Weight
35.0 kg
38.3 kg
-3.3 kg for 610NT60-HU/BF-DG
Weight per kWp
57.4 kg/kWp
57.6 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
120
132
12 cells apart
Bifacial
Yes
Yes
Same
04
14,005 panels
Against the whole database
Efficiency
#7,784
vs
#8,323
610NT60-HU/BF-DG leads by 539 places
Power density
#7,727
vs
#8,250
610NT60-HU/BF-DG leads by 523 places
Heat behaviour
#6,093
vs
#6,093
Tied - the same position in the database
Weight
#11,191
vs
#11,303
610NT60-HU/BF-DG leads by 112 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#4,578
vs
#2,833
665NT66-HU/BF-DG leads by 1,745 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: EGing PV EG-610NT60-HU/BF-DG or EGing PV EG-665NT66-HU/BF-DG?
According to our database: EGing PV EG-610NT60-HU/BF-DG has higher module efficiency (21.55% vs 21.40%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of EGing PV EG-610NT60-HU/BF-DG and EGing PV EG-665NT66-HU/BF-DG?
EGing PV EG-610NT60-HU/BF-DG has a module efficiency of 21.55%, while EGing PV EG-665NT66-HU/BF-DG is 21.40%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does EGing PV EG-610NT60-HU/BF-DG use vs EGing PV EG-665NT66-HU/BF-DG?
EGing PV EG-610NT60-HU/BF-DG uses TOPCon cells; EGing PV EG-665NT66-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-610NT60-HU/BF-DG and EGing PV EG-665NT66-HU/BF-DG?
EGing PV EG-610NT60-HU/BF-DG has a 30 years power warranty; EGing PV EG-665NT66-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-610NT60-HU/BF-DG and EGing PV EG-665NT66-HU/BF-DG bifacial panels?
Both EGing PV EG-610NT60-HU/BF-DG and EGing PV EG-665NT66-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.