66HT720W vs 66HT740W 15 of 19 identical Swap Change panels

Hanersun HN21N-66HT720W vs Hanersun HN21N-66HT740W

Q: Which panel is better: Hanersun HN21N-66HT720W or Hanersun HN21N-66HT740W?

According to our database: Hanersun HN21N-66HT740W has higher module efficiency (23.80% vs 23.20%). See the full spec comparison and 30-year energy simulation above for a complete picture.

Q: What is the efficiency of Hanersun HN21N-66HT720W and Hanersun HN21N-66HT740W?

Hanersun HN21N-66HT720W has a module efficiency of 23.20%, while Hanersun HN21N-66HT740W is 23.80%. Higher efficiency means more electricity from the same roof area - useful when space is limited.

Q: What cell technology does Hanersun HN21N-66HT720W use vs Hanersun HN21N-66HT740W?

Hanersun HN21N-66HT720W uses N-type cells; Hanersun HN21N-66HT740W uses TOPCon. Modern n-type technologies (TOPCon, HJT, BC) typically deliver higher efficiency and lower degradation compared to older PERC (p-type) cells.

Q: What is the warranty on Hanersun HN21N-66HT720W and Hanersun HN21N-66HT740W?

Hanersun HN21N-66HT720W has a 30 years power warranty; Hanersun HN21N-66HT740W 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.

Q: Are Hanersun HN21N-66HT720W and Hanersun HN21N-66HT740W bifacial panels?

Both Hanersun HN21N-66HT720W and Hanersun HN21N-66HT740W 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.

Hanersun

HN21N-66HT720W

720 Wp 23.20 % N-type Bifacial

Open panel page Datasheet PDF

Hanersun

HN21N-66HT740W

740 Wp 23.80 % TOPCon Bifacial

Open panel page Datasheet PDF

The verdict

66HT740W leads on the differences that matter

The largest is module efficiency: 0.60 pp more efficient. 15 of 19 comparable parameters are identical.

See all 4 differences

How alike are they

15 of 19 comparable
parameters are identical

identical differs

What actually differs

4 of 19 parameters

Parameter 66HT720W 66HT740W Difference

Module efficiency 23.20 % 23.80 % 0.60 pp more efficient

Power density 231.8 Wp/m² 238.2 Wp/m² 6.4 Wp/m² higher

Rated power 720 Wp 740 Wp 20 W more power

Cell technology N-type TOPCon N-type vs TOPCon

What it means on a roof

Thirty years of production

Each panel's own declared degradation curve, at 1,200 kWh/kWp a year

Cell temperature

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.

66HT720W

24,157 kWh

66HT740W

24,828 kWh

Lifetime gap

671 kWh

Output when it is hot

Rated power carried across the range a module actually sees

Scenario 66HT720W 66HT740W

Standard test conditions 25 °C 100.0% of rated power 720 W 740 W

Cool, bright day 40 °C 95.8% of rated power 690 W 709 W

Typical summer roof 55 °C 91.6% of rated power 660 W 678 W

Hot roof 70 °C 87.4% of rated power 629 W 647 W

Full specification

Parameter 66HT720W 66HT740W Difference

Power and efficiency

Rated power 720 Wp 740 Wp +20 W for 66HT740W

Module efficiency 23.20 % 23.80 % +0.60 pp for 66HT740W

Power density 231.8 Wp/m² 238.2 Wp/m² +6.4 Wp/m² for 66HT740W

Open-circuit voltage 49.00 V 49.80 V Effectively the same

Voltage at max power 41.20 V 41.92 V Effectively the same

Short-circuit current 18.50 A 18.66 A Effectively the same

Current at max power 17.48 A 17.66 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 51.9 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 0.40 %/yr 0.40 %/yr Same

Technology

Cell technology N-type TOPCon N-type vs TOPCon

Cell type Monocrystalline Monocrystalline Same

Cell count 132 132 Same

Bifacial Yes Yes Same

Against the whole database

14,005 panels

Efficiency

#1,306 vs #433

66HT740W leads by 873 places

Power density

#1,347 vs #431

66HT740W leads by 916 places

Heat behaviour

#1,309 vs #1,309

Tied - the same position in the database

Weight

#5,380 vs #3,922

66HT740W leads by 1,458 places

Warranty

#21 vs #21

Tied - the same position in the database

Overall

#330 vs #130

66HT740W leads by 200 places

More useful comparisons

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The same specification on paper

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Hanersun HN21N-66HT720W vs Hanersun HN21N-66HT715W

One difference: module efficiency

Written summary

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Questions about this pairing

Which panel is better: Hanersun HN21N-66HT720W or Hanersun HN21N-66HT740W?

According to our database: Hanersun HN21N-66HT740 W has higher module efficiency (23.80% vs 23.20%). See the full spec comparison and 30-year energy simulation above for a complete picture.

What is the efficiency of Hanersun HN21N-66HT720W and Hanersun HN21N-66HT740W?

Hanersun HN21N-66HT720 W has a module efficiency of 23.20%, 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 HN21N-66HT720W use vs Hanersun HN21N-66HT740W?

Hanersun HN21N-66HT720 W uses N-type 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 HN21N-66HT720W and Hanersun HN21N-66HT740W?

Hanersun HN21N-66HT720 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 HN21N-66HT720W and Hanersun HN21N-66HT740W bifacial panels?

Both Hanersun HN21N-66HT720 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.