Hanersun HN21RN-66QT670W vs Hanersun HN21RN-66QT660W
VS
The verdict
66QT670W leads on the differences that matter
The largest is module efficiency: 0.40 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
66QT670W
66QT660W
Difference
Module efficiency
24.80 %
24.40 %
0.40 pp more efficient
Power density
248.0 Wp/m²
244.3 Wp/m²
3.7 Wp/m² higher
Rated power
670 Wp
660 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 (-0.260 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other.
66QT670W
22,655 kWh
66QT660W
22,317 kWh
Lifetime gap
338 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
66QT670W
66QT660W
Standard test conditions
25 °C
100.0% of rated power
670 W
660 W
Cool, bright day
40 °C
96.1% of rated power
644 W
634 W
Typical summer roof
55 °C
92.2% of rated power
618 W
609 W
Hot roof
70 °C
88.3% of rated power
592 W
583 W
03
Full specification
Parameter
66QT670W
66QT660W
Difference
Power and efficiency
Rated power
670 Wp
660 Wp
+10 W for 66QT670W
Module efficiency
24.80 %
24.40 %
+0.40 pp for 66QT670W
Power density
248.0 Wp/m²
244.3 Wp/m²
+3.7 Wp/m² for 66QT670W
Open-circuit voltage
50.84 V
50.60 V
Effectively the same
Voltage at max power
42.57 V
42.35 V
Effectively the same
Short-circuit current
16.64 A
16.50 A
Effectively the same
Current at max power
15.74 A
15.59 A
Effectively the same
Temperature
Temperature coefficient
-0.260 %/°C
-0.260 %/°C
Same
Mechanical
Dimensions
2382x1134x30 mm
2382x1134x30 mm
Same
Module area
2.701 m²
2.701 m²
Same
Weight
32.5 kg
32.5 kg
Same
Weight per kWp
48.5 kg/kWp
49.2 kg/kWp
Effectively the same
Warranty and degradation
Product warranty
15 yrs
15 yrs
Same
Performance warranty
30 yrs
30 yrs
Same
Annual degradation
0.35 %/yr
0.35 %/yr
Same
Technology
Cell technology
TOPCon
TOPCon
Same
Cell type
Monocrystalline
Monocrystalline
Same
Cell count
264
264
Same
Bifacial
Yes
Yes
Same
04
14,005 panels
Against the whole database
Efficiency
#12
vs
#99
66QT670W leads by 87 places
Power density
#14
vs
#88
66QT670W leads by 74 places
Heat behaviour
#511
vs
#511
Tied - the same position in the database
Weight
#2,321
vs
#2,811
66QT670W leads by 490 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#297
vs
#569
66QT670W leads by 272 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: Hanersun HN21RN-66QT670W or Hanersun HN21RN-66QT660W?
According to our database: Hanersun HN21RN-66QT670 W has higher module efficiency (24.80% vs 24.40%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Hanersun HN21RN-66QT670W and Hanersun HN21RN-66QT660W?
Hanersun HN21RN-66QT670 W has a module efficiency of 24.80%, while Hanersun HN21RN-66QT660 W is 24.40%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Hanersun HN21RN-66QT670W use vs Hanersun HN21RN-66QT660W?
Hanersun HN21RN-66QT670 W uses TOPCon cells; Hanersun HN21RN-66QT660 W 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 Hanersun HN21RN-66QT670W and Hanersun HN21RN-66QT660W?
Hanersun HN21RN-66QT670 W has a 30 years power warranty; Hanersun HN21RN-66QT660 W 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 Hanersun HN21RN-66QT670W and Hanersun HN21RN-66QT660W bifacial panels?
Both Hanersun HN21RN-66QT670 W and Hanersun HN21RN-66QT660 W 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 19 Hanersun 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.