Hanersun HN21N-66HT745W vs Hanersun HN21N-66HT735W
VS
The verdict
66HT745W leads on the differences that matter
The largest is module efficiency: 0.30 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
66HT745W
66HT735W
Difference
Module efficiency
24.00 %
23.70 %
0.30 pp more efficient
Power density
239.8 Wp/m²
236.6 Wp/m²
3.2 Wp/m² higher
Rated power
745 Wp
735 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 (-0.280 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other.
66HT745W
24,996 kWh
66HT735W
24,661 kWh
Lifetime gap
335 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
66HT745W
66HT735W
Standard test conditions
25 °C
100.0% of rated power
745 W
735 W
Cool, bright day
40 °C
95.8% of rated power
714 W
704 W
Typical summer roof
55 °C
91.6% of rated power
682 W
673 W
Hot roof
70 °C
87.4% of rated power
651 W
642 W
03
Full specification
Parameter
66HT745W
66HT735W
Difference
Power and efficiency
Rated power
745 Wp
735 Wp
+10 W for 66HT745W
Module efficiency
24.00 %
23.70 %
+0.30 pp for 66HT745W
Power density
239.8 Wp/m²
236.6 Wp/m²
+3.2 Wp/m² for 66HT745W
Open-circuit voltage
50.00 V
49.60 V
Effectively the same
Voltage at max power
42.08 V
41.76 V
Effectively the same
Short-circuit current
18.70 A
18.62 A
Effectively the same
Current at max power
17.71 A
17.61 A
Effectively the same
Temperature
Temperature coefficient
-0.280 %/°C
-0.280 %/°C
Same
Mechanical
Dimensions
2384x1303x33 mm
2384x1303x33 mm
Same
Module area
3.106 m²
3.106 m²
Same
Weight
37.4 kg
37.4 kg
Same
Weight per kWp
50.2 kg/kWp
50.9 kg/kWp
Effectively the same
Warranty and degradation
Product warranty
15 yrs
15 yrs
Same
Performance warranty
30 yrs
30 yrs
Same
Annual degradation
0.40 %/yr
0.40 %/yr
Same
Technology
Cell technology
TOPCon
TOPCon
Same
Cell type
Monocrystalline
Monocrystalline
Same
Cell count
132
132
Same
Bifacial
Yes
Yes
Same
04
14,005 panels
Against the whole database
Efficiency
#303
vs
#517
66HT745W leads by 214 places
Power density
#339
vs
#582
66HT745W leads by 243 places
Heat behaviour
#1,309
vs
#1,309
Tied - the same position in the database
Weight
#3,665
vs
#4,262
66HT745W leads by 597 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#98
vs
#155
66HT745W leads by 57 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 HN21N-66HT745W or Hanersun HN21N-66HT735W?
According to our database: Hanersun HN21N-66HT745 W has higher module efficiency (24.00% vs 23.70%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Hanersun HN21N-66HT745W and Hanersun HN21N-66HT735W?
Hanersun HN21N-66HT745 W has a module efficiency of 24.00%, while Hanersun HN21N-66HT735 W is 23.70%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Hanersun HN21N-66HT745W use vs Hanersun HN21N-66HT735W?
Hanersun HN21N-66HT745 W uses TOPCon cells; Hanersun HN21N-66HT735 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 HN21N-66HT745W and Hanersun HN21N-66HT735W?
Hanersun HN21N-66HT745 W has a 30 years power warranty; Hanersun HN21N-66HT735 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 HN21N-66HT745W and Hanersun HN21N-66HT735W bifacial panels?
Both Hanersun HN21N-66HT745 W and Hanersun HN21N-66HT735 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.