EGing PV EG-670NT66-HU/BF-DG vs EGing PV EG-590M60-HU/BF-DG
VS
The verdict
670NT66-HU/BF-DG leads on the differences that matter
The largest is temperature coefficient: 0.040 %/°C better in heat. 6 of 19 comparable parameters are identical.
See all 13 differencesHow alike are they
6
of 19 comparable
parameters are identical
parameters are identical
identical
differs
01
13 of 19 parameters
What actually differs
Parameter
670NT66-HU/BF-DG
590M60-HU/BF-DG
Difference
Temperature coefficient
-0.300 %/°C
-0.340 %/°C
0.040 %/°C better in heat
Module efficiency
21.56 %
20.84 %
0.72 pp more efficient
Rated power
670 Wp
590 Wp
80 W more power
Weight
38.3 kg
35.0 kg
3.3 kg lighter
Power density
215.7 Wp/m²
208.5 Wp/m²
7.2 Wp/m² higher
Open-circuit voltage
47.01 V
41.31 V
5.70 V apart
Module area
3.106 m²
2.830 m²
0.276 m² apart
Cell technology
TOPCon
PERC
TOPCon vs PERC
Voltage at max power
39.21 V
34.21 V
5.00 V apart
Cell count
132
120
12 cells apart
Annual degradation
0.40 %/yr
0.45 %/yr
0.05 %/yr slower
Weight per kWp
57.2 kg/kWp
59.3 kg/kWp
2.2 kg/kWp lighter
Dimensions
2384x1303x35 mm
2172x1303x35 mm
2384x1303x35 mm vs 2172x1303x35 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
670NT66-HU/BF-DG
22,480 kWh
590M60-HU/BF-DG
19,429 kWh
Lifetime gap
3,051 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
670NT66-HU/BF-DG
590M60-HU/BF-DG
Standard test conditions
25 °C
100.0% of rated power
670 W
590 W
Cool, bright day
40 °C
94.9% of rated power
640 W
560 W
Typical summer roof
55 °C
89.8% of rated power
610 W
530 W
Hot roof
70 °C
84.7% of rated power
580 W
500 W
03
Full specification
Parameter
670NT66-HU/BF-DG
590M60-HU/BF-DG
Difference
Power and efficiency
Rated power
670 Wp
590 Wp
+80 W for 670NT66-HU/BF-DG
Module efficiency
21.56 %
20.84 %
+0.72 pp for 670NT66-HU/BF-DG
Power density
215.7 Wp/m²
208.5 Wp/m²
+7.2 Wp/m² for 670NT66-HU/BF-DG
Open-circuit voltage
47.01 V
41.31 V
5.70 V apart
Voltage at max power
39.21 V
34.21 V
5.00 V apart
Short-circuit current
18.10 A
18.30 A
Effectively the same
Current at max power
17.09 A
17.25 A
Effectively the same
Temperature
Temperature coefficient
-0.300 %/°C
-0.340 %/°C
+0.040 %/°C for 670NT66-HU/BF-DG
Mechanical
Dimensions
2384x1303x35 mm
2172x1303x35 mm
2384x1303x35 mm vs 2172x1303x35 mm
Module area
3.106 m²
2.830 m²
0.276 m² apart
Weight
38.3 kg
35.0 kg
-3.3 kg for 590M60-HU/BF-DG
Weight per kWp
57.2 kg/kWp
59.3 kg/kWp
-2.2 kg/kWp for 670NT66-HU/BF-DG
Warranty and degradation
Product warranty
12 yrs
12 yrs
Same
Performance warranty
30 yrs
30 yrs
Same
Annual degradation
0.40 %/yr
0.45 %/yr
-0.05 %/yr for 670NT66-HU/BF-DG
Technology
Cell technology
TOPCon
PERC
TOPCon vs PERC
Cell type
Monocrystalline
Monocrystalline
Same
Cell count
132
120
12 cells apart
Bifacial
Yes
Yes
Same
04
14,005 panels
Against the whole database
Efficiency
#7,774
vs
#10,421
670NT66-HU/BF-DG leads by 2,647 places
Power density
#7,644
vs
#10,359
670NT66-HU/BF-DG leads by 2,715 places
Heat behaviour
#6,093
vs
#8,778
670NT66-HU/BF-DG leads by 2,685 places
Weight
#11,112
vs
#12,099
670NT66-HU/BF-DG leads by 987 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#2,497
vs
#6,044
670NT66-HU/BF-DG leads by 3,547 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-670NT66-HU/BF-DG or EGing PV EG-590M60-HU/BF-DG?
According to our database: EGing PV EG-670NT66-HU/BF-DG has higher module efficiency (21.56% vs 20.84%); EGing PV EG-670NT66-HU/BF-DG tolerates heat better (temp coeff -0.300%/°C vs -0.340%/°C). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of EGing PV EG-670NT66-HU/BF-DG and EGing PV EG-590M60-HU/BF-DG?
EGing PV EG-670NT66-HU/BF-DG has a module efficiency of 21.56%, while EGing PV EG-590M60-HU/BF-DG is 20.84%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does EGing PV EG-670NT66-HU/BF-DG use vs EGing PV EG-590M60-HU/BF-DG?
EGing PV EG-670NT66-HU/BF-DG uses TOPCon cells; EGing PV EG-590M60-HU/BF-DG uses PERC. 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-670NT66-HU/BF-DG and EGing PV EG-590M60-HU/BF-DG?
EGing PV EG-670NT66-HU/BF-DG has a 30 years power warranty; EGing PV EG-590M60-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-670NT66-HU/BF-DG and EGing PV EG-590M60-HU/BF-DG bifacial panels?
Both EGing PV EG-670NT66-HU/BF-DG and EGing PV EG-590M60-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.