Skip to main content
66HT740W vs 66HT745W 18 of 19 identical Swap Change panels

Hanersun HN21N-66HT740W vs Hanersun HN21N-66HT745W

Hanersun HN21N-66HT740W
Hanersun
HN21N-66HT740W
740 Wp 23.80 % TOPCon Bifacial
Open panel page Datasheet PDF
VS
Hanersun HN21N-66HT745W
Hanersun
HN21N-66HT745W
745 Wp 24.00 % TOPCon Bifacial
Open panel page Datasheet PDF
The verdict

66HT745W leads on the differences that matter

The largest is module efficiency: 0.20 pp more efficient. 18 of 19 comparable parameters are identical.

See the one difference
How alike are they
18 of 19 comparable
parameters are identical
identical differs
01

What actually differs

1 of 19 parameters
Parameter 66HT740W 66HT745W Difference
Module efficiency 23.80 % 24.00 % 0.20 pp more efficient
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.
66HT740W
24,828 kWh
66HT745W
24,996 kWh
Lifetime gap
168 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario 66HT740W 66HT745W
Standard test conditions 25 °C 100.0% of rated power 740 W 745 W
Cool, bright day 40 °C 95.8% of rated power 709 W 714 W
Typical summer roof 55 °C 91.6% of rated power 678 W 682 W
Hot roof 70 °C 87.4% of rated power 647 W 651 W
03

Full specification

Parameter 66HT740W 66HT745W Difference
Power and efficiency
Rated power 740 Wp 745 Wp Effectively the same
Module efficiency 23.80 % 24.00 % +0.20 pp for 66HT745W
Power density 238.2 Wp/m² 239.8 Wp/m² Effectively the same
Open-circuit voltage 49.80 V 50.00 V Effectively the same
Voltage at max power 41.92 V 42.08 V Effectively the same
Short-circuit current 18.66 A 18.70 A Effectively the same
Current at max power 17.66 A 17.71 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 50.5 kg/kWp 50.2 kg/kWp Effectively the same
Warranty and degradation
Product warranty 15 yrs 15 yrs Same
Performance warranty 30 yrs 30 yrs Same
Annual degradation 0.40 %/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

Against the whole database

14,005 panels
Efficiency
#433 vs #303
66HT745W leads by 130 places
Power density
#431 vs #339
66HT745W leads by 92 places
Heat behaviour
#1,309 vs #1,309
Tied - the same position in the database
Weight
#3,922 vs #3,665
66HT745W leads by 257 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#130 vs #98
66HT745W leads by 32 places
05

More useful comparisons

Open the full database
Same series, other bin
Hanersun
Hanersun HN21N-66HT740W vs Hanersun HN21N-66HT750W
3 differences, the largest is module efficiency
Same series, other bin
Hanersun
Hanersun HN21N-66HT740W vs Hanersun HN21N-66HT735W
The same specification on paper
Same series, other bin
Hanersun
Hanersun HN21N-66HT740W vs Hanersun HN21RN-66QT670W
13 differences, the largest is module efficiency
Same series, other bin
Hanersun
Hanersun HN21N-66HT740W vs Hanersun HN21RN-66QT665W
11 differences, the largest is module efficiency
Same series, other bin
Hanersun
Hanersun HN21N-66HT740W vs Hanersun HN21RN-66QT660W
11 differences, the largest is rated power
Same series, other bin
Hanersun
Hanersun HN21N-66HT740W vs Hanersun HN21RN-66QT655W
11 differences, the largest is rated power
06

Written summary

07

Questions about this pairing

Which panel is better: Hanersun HN21N-66HT740W or Hanersun HN21N-66HT745W?
According to our database: Hanersun HN21N-66HT745 W has higher module efficiency (24.00% vs 23.80%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Hanersun HN21N-66HT740W and Hanersun HN21N-66HT745W?
Hanersun HN21N-66HT740 W has a module efficiency of 23.80%, 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 HN21N-66HT740W use vs Hanersun HN21N-66HT745W?
Hanersun HN21N-66HT740 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 HN21N-66HT740W and Hanersun HN21N-66HT745W?
Hanersun HN21N-66HT740 W has a 30 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 HN21N-66HT740W and Hanersun HN21N-66HT745W bifacial panels?
Both Hanersun HN21N-66HT740 W and Hanersun HN21N-66HT745 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.