Hanersun HN21RN-66QT665W vs Hanersun HN21N-66HT740W
VS
The verdict
HN21RN-66QT665W leads on the differences that matter
The largest is module efficiency: 0.80 pp more efficient. 8 of 19 comparable parameters are identical.
See all 11 differencesHow alike are they
8
of 19 comparable
parameters are identical
parameters are identical
identical
differs
01
11 of 19 parameters
What actually differs
Parameter
HN21RN-66QT665W
HN21N-66HT740W
Difference
Module efficiency
24.60 %
23.80 %
0.80 pp more efficient
Rated power
665 Wp
740 Wp
75 W more power
Weight
32.5 kg
37.4 kg
4.9 kg lighter
Power density
246.2 Wp/m²
238.2 Wp/m²
8.0 Wp/m² higher
Temperature coefficient
-0.260 %/°C
-0.280 %/°C
0.020 %/°C better in heat
Short-circuit current
16.57 A
18.66 A
2.09 A apart
Module area
2.701 m²
3.106 m²
0.405 m² apart
Annual degradation
0.35 %/yr
0.40 %/yr
0.05 %/yr slower
Cell count
264
132
132 cells apart
Current at max power
15.67 A
17.66 A
1.99 A apart
Dimensions
2382x1134x30 mm
2384x1303x33 mm
2382x1134x30 mm vs 2384x1303x33 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
HN21RN-66QT665W
22,486 kWh
HN21N-66HT740W
24,828 kWh
Lifetime gap
2,342 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
HN21RN-66QT665W
HN21N-66HT740W
Standard test conditions
25 °C
100.0% of rated power
665 W
740 W
Cool, bright day
40 °C
95.8% of rated power
639 W
709 W
Typical summer roof
55 °C
91.6% of rated power
613 W
678 W
Hot roof
70 °C
87.4% of rated power
587 W
647 W
03
Full specification
Parameter
HN21RN-66QT665W
HN21N-66HT740W
Difference
Power and efficiency
Rated power
665 Wp
740 Wp
+75 W for HN21N-66HT740W
Module efficiency
24.60 %
23.80 %
+0.80 pp for HN21RN-66QT665W
Power density
246.2 Wp/m²
238.2 Wp/m²
+8.0 Wp/m² for HN21RN-66QT665W
Open-circuit voltage
50.72 V
49.80 V
Effectively the same
Voltage at max power
42.46 V
41.92 V
Effectively the same
Short-circuit current
16.57 A
18.66 A
2.09 A apart
Current at max power
15.67 A
17.66 A
1.99 A apart
Temperature
Temperature coefficient
-0.260 %/°C
-0.280 %/°C
+0.020 %/°C for HN21RN-66QT665W
Mechanical
Dimensions
2382x1134x30 mm
2384x1303x33 mm
2382x1134x30 mm vs 2384x1303x33 mm
Module area
2.701 m²
3.106 m²
0.405 m² apart
Weight
32.5 kg
37.4 kg
-4.9 kg for HN21RN-66QT665W
Weight per kWp
48.9 kg/kWp
50.5 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
0.40 %/yr
-0.05 %/yr for HN21RN-66QT665W
Technology
Cell technology
TOPCon
TOPCon
Same
Cell type
Monocrystalline
Monocrystalline
Same
Cell count
264
132
132 cells apart
Bifacial
Yes
Yes
Same
04
14,005 panels
Against the whole database
Efficiency
#51
vs
#433
HN21RN-66QT665W leads by 382 places
Power density
#42
vs
#431
HN21RN-66QT665W leads by 389 places
Heat behaviour
#511
vs
#1,309
HN21RN-66QT665W leads by 798 places
Weight
#2,555
vs
#3,922
HN21RN-66QT665W leads by 1,367 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#409
vs
#130
HN21N-66HT740W leads by 279 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-66QT665W or Hanersun HN21N-66HT740W?
According to our database: Hanersun HN21RN-66QT665 W has higher module efficiency (24.60% vs 23.80%); Hanersun HN21RN-66QT665 W tolerates heat better (temp coeff -0.260%/°C vs -0.280%/°C). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Hanersun HN21RN-66QT665W and Hanersun HN21N-66HT740W?
Hanersun HN21RN-66QT665 W has a module efficiency of 24.60%, while Hanersun HN21N-66HT740 W is 23.80%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Hanersun HN21RN-66QT665W use vs Hanersun HN21N-66HT740W?
Hanersun HN21RN-66QT665 W uses TOPCon cells; Hanersun HN21N-66HT740 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-66QT665W and Hanersun HN21N-66HT740W?
Hanersun HN21RN-66QT665 W has a 30 years power warranty; Hanersun HN21N-66HT740 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-66QT665W and Hanersun HN21N-66HT740W bifacial panels?
Both Hanersun HN21RN-66QT665 W and Hanersun HN21N-66HT740 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.