Hanersun HN18-72H575W vs Hanersun HN21N-66HT745W
VS
The verdict
HN21N-66HT745W leads on the differences that matter
The largest is module efficiency: 1.74 pp more efficient. 5 of 19 comparable parameters are identical.
See all 14 differencesHow alike are they
5
of 19 comparable
parameters are identical
parameters are identical
identical
differs
01
14 of 19 parameters
What actually differs
Parameter
HN18-72H575W
HN21N-66HT745W
Difference
Module efficiency
22.26 %
24.00 %
1.74 pp more efficient
Rated power
575 Wp
745 Wp
170 W more power
Power density
222.6 Wp/m²
239.8 Wp/m²
17.2 Wp/m² higher
Performance warranty
25 yrs
30 yrs
5 yrs longer
Temperature coefficient
-0.310 %/°C
-0.280 %/°C
0.030 %/°C better in heat
Weight
28.5 kg
37.4 kg
8.9 kg lighter
Product warranty
12 yrs
15 yrs
3 yrs longer
Short-circuit current
14.17 A
18.70 A
4.53 A apart
Module area
2.583 m²
3.106 m²
0.523 m² apart
Current at max power
13.38 A
17.71 A
4.33 A apart
Cell count
144
132
12 cells apart
Bifacial
No
Yes
No vs Yes
Open-circuit voltage
51.20 V
50.00 V
1.20 V apart
Dimensions
2278x1134x30 mm
2384x1303x33 mm
2278x1134x30 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
HN18-72H575W
19,292 kWh
HN21N-66HT745W
24,996 kWh
Lifetime gap
5,704 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
HN18-72H575W
HN21N-66HT745W
Standard test conditions
25 °C
100.0% of rated power
575 W
745 W
Cool, bright day
40 °C
95.3% of rated power
548 W
714 W
Typical summer roof
55 °C
90.7% of rated power
522 W
682 W
Hot roof
70 °C
86.0% of rated power
495 W
651 W
03
Full specification
Parameter
HN18-72H575W
HN21N-66HT745W
Difference
Power and efficiency
Rated power
575 Wp
745 Wp
+170 W for HN21N-66HT745W
Module efficiency
22.26 %
24.00 %
+1.74 pp for HN21N-66HT745W
Power density
222.6 Wp/m²
239.8 Wp/m²
+17.2 Wp/m² for HN21N-66HT745W
Open-circuit voltage
51.20 V
50.00 V
1.20 V apart
Voltage at max power
43.00 V
42.08 V
Effectively the same
Short-circuit current
14.17 A
18.70 A
4.53 A apart
Current at max power
13.38 A
17.71 A
4.33 A apart
Temperature
Temperature coefficient
-0.310 %/°C
-0.280 %/°C
+0.030 %/°C for HN21N-66HT745W
Mechanical
Dimensions
2278x1134x30 mm
2384x1303x33 mm
2278x1134x30 mm vs 2384x1303x33 mm
Module area
2.583 m²
3.106 m²
0.523 m² apart
Weight
28.5 kg
37.4 kg
-8.9 kg for HN18-72H575W
Weight per kWp
49.6 kg/kWp
50.2 kg/kWp
Effectively the same
Warranty and degradation
Product warranty
12 yrs
15 yrs
+3 yrs for HN21N-66HT745W
Performance warranty
25 yrs
30 yrs
+5 yrs for HN21N-66HT745W
Annual degradation
0.40 %/yr
0.40 %/yr
Same
Technology
Cell technology
TOPCon
TOPCon
Same
Cell type
Monocrystalline
Monocrystalline
Same
Cell count
144
132
12 cells apart
Bifacial
No
Yes
No vs Yes
04
14,129 panels
Against the whole database
Efficiency
#5,656
vs
#329
HN21N-66HT745W leads by 5,327 places
Power density
#5,612
vs
#366
HN21N-66HT745W leads by 5,246 places
Heat behaviour
#8,069
vs
#1,347
HN21N-66HT745W leads by 6,722 places
Weight
#3,142
vs
#3,681
HN18-72H575W leads by 539 places
Warranty
#9,912
vs
#21
HN21N-66HT745W leads by 9,891 places
Overall
#5,917
vs
#98
HN21N-66HT745W leads by 5,819 places
05
Open the full database
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06
Written summary
Checking cache...
07
Questions about this pairing
Which panel is better: Hanersun HN18-72H575W or Hanersun HN21N-66HT745W?
According to our database: Hanersun HN21N-66HT745 W has higher module efficiency (24.00% vs 22.26%); Hanersun HN21N-66HT745 W tolerates heat better (temp coeff -0.280%/°C vs -0.310%/°C). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Hanersun HN18-72H575W and Hanersun HN21N-66HT745W?
Hanersun HN18-72H575 W has a module efficiency of 22.26%, while Hanersun HN21N-66HT745 W is 24.00%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Hanersun HN18-72H575W use vs Hanersun HN21N-66HT745W?
Hanersun HN18-72H575 W uses TOPCon cells; Hanersun HN21N-66HT745 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 HN18-72H575W and Hanersun HN21N-66HT745W?
Hanersun HN18-72H575 W has a 25 years power warranty; Hanersun HN21N-66HT745 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 HN18-72H575W and Hanersun HN21N-66HT745W bifacial panels?
Hanersun HN21N-66HT745 W is bifacial (captures light from both faces); Hanersun HN18-72H575 W is monofacial. Bifacial panels work best on ground mounts or raised structures with a light-coloured surface underneath.
Shop prices: See 14 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.