HN21N-66HT740W vs HN18-72H585W 4 of 19 identical Swap Change panels

Hanersun HN21N-66HT740W vs Hanersun HN18-72H585W

Q: Which panel is better: Hanersun HN21N-66HT740W or Hanersun HN18-72H585W?

According to our database: Hanersun HN21N-66HT740W has higher module efficiency (23.80% vs 22.65%); Hanersun HN21N-66HT740W 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.

Q: What is the efficiency of Hanersun HN21N-66HT740W and Hanersun HN18-72H585W?

Hanersun HN21N-66HT740W has a module efficiency of 23.80%, while Hanersun HN18-72H585W is 22.65%. Higher efficiency means more electricity from the same roof area - useful when space is limited.

Q: What cell technology does Hanersun HN21N-66HT740W use vs Hanersun HN18-72H585W?

Hanersun HN21N-66HT740W uses TOPCon cells; Hanersun HN18-72H585W 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-66HT740W and Hanersun HN18-72H585W?

Hanersun HN21N-66HT740W has a 30 years power warranty; Hanersun HN18-72H585W has a 25 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-66HT740W and Hanersun HN18-72H585W bifacial panels?

Hanersun HN21N-66HT740W is bifacial (captures light from both faces); Hanersun HN18-72H585W is monofacial. Bifacial panels work best on ground mounts or raised structures with a light-coloured surface underneath.

Hanersun

HN21N-66HT740W

740 Wp 23.80 % TOPCon Bifacial

Open panel page Datasheet PDF

Hanersun

HN18-72H585W

585 Wp 22.65 % TOPCon

Open panel page Datasheet PDF

The verdict

HN21N-66HT740W leads on the differences that matter

The largest is module efficiency: 1.15 pp more efficient. 4 of 19 comparable parameters are identical.

See all 15 differences

How alike are they

4 of 19 comparable
parameters are identical

identical differs

What actually differs

15 of 19 parameters

Parameter HN21N-66HT740W HN18-72H585W Difference

Module efficiency 23.80 % 22.65 % 1.15 pp more efficient

Rated power 740 Wp 585 Wp 155 W more power

Performance warranty 30 yrs 25 yrs 5 yrs longer

Power density 238.2 Wp/m² 226.5 Wp/m² 11.8 Wp/m² higher

Temperature coefficient -0.280 %/°C -0.310 %/°C 0.030 %/°C better in heat

Weight 37.4 kg 28.5 kg 8.9 kg lighter

Product warranty 15 yrs 12 yrs 3 yrs longer

Short-circuit current 18.66 A 14.29 A 4.37 A apart

Module area 3.106 m² 2.583 m² 0.523 m² apart

Current at max power 17.66 A 13.48 A 4.18 A apart

Cell count 132 144 12 cells apart

Open-circuit voltage 49.80 V 51.60 V 1.80 V apart

Bifacial Yes No Yes vs No

Dimensions 2384x1303x33 mm 2278x1134x30 mm 2384x1303x33 mm vs 2278x1134x30 mm

Voltage at max power 41.92 V 43.40 V 1.48 V apart

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

HN21N-66HT740W

24,828 kWh

HN18-72H585W

19,628 kWh

Lifetime gap

5,200 kWh

Output when it is hot

Rated power carried across the range a module actually sees

Scenario HN21N-66HT740W HN18-72H585W

Standard test conditions 25 °C 100.0% of rated power 740 W 585 W

Cool, bright day 40 °C 95.3% of rated power 709 W 558 W

Typical summer roof 55 °C 90.7% of rated power 678 W 531 W

Hot roof 70 °C 86.0% of rated power 647 W 503 W

Full specification

Parameter HN21N-66HT740W HN18-72H585W Difference

Power and efficiency

Rated power 740 Wp 585 Wp +155 W for HN21N-66HT740W

Module efficiency 23.80 % 22.65 % +1.15 pp for HN21N-66HT740W

Power density 238.2 Wp/m² 226.5 Wp/m² +11.8 Wp/m² for HN21N-66HT740W

Open-circuit voltage 49.80 V 51.60 V 1.80 V apart

Voltage at max power 41.92 V 43.40 V 1.48 V apart

Short-circuit current 18.66 A 14.29 A 4.37 A apart

Current at max power 17.66 A 13.48 A 4.18 A apart

Temperature

Temperature coefficient -0.280 %/°C -0.310 %/°C +0.030 %/°C for HN21N-66HT740W

Mechanical

Dimensions 2384x1303x33 mm 2278x1134x30 mm 2384x1303x33 mm vs 2278x1134x30 mm

Module area 3.106 m² 2.583 m² 0.523 m² apart

Weight 37.4 kg 28.5 kg -8.9 kg for HN18-72H585W

Weight per kWp 50.5 kg/kWp 48.7 kg/kWp Effectively the same

Warranty and degradation

Product warranty 15 yrs 12 yrs +3 yrs for HN21N-66HT740W

Performance warranty 30 yrs 25 yrs +5 yrs for HN21N-66HT740W

Annual degradation 0.40 %/yr 0.40 %/yr Same

Technology

Cell technology TOPCon TOPCon Same

Cell type Monocrystalline Monocrystalline Same

Cell count 132 144 12 cells apart

Bifacial Yes No Yes vs No

Against the whole database

14,129 panels

Efficiency

#462 vs #3,579

HN21N-66HT740W leads by 3,117 places

Power density

#460 vs #3,557

HN21N-66HT740W leads by 3,097 places

Heat behaviour

#1,347 vs #8,069

HN21N-66HT740W leads by 6,722 places

Weight

#3,944 vs #2,436

HN18-72H585W leads by 1,508 places

Warranty

#21 vs #9,912

HN21N-66HT740W leads by 9,891 places

Overall

#130 vs #5,102

HN21N-66HT740W leads by 4,972 places

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Written summary

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Questions about this pairing

Which panel is better: Hanersun HN21N-66HT740W or Hanersun HN18-72H585W?

According to our database: Hanersun HN21N-66HT740 W has higher module efficiency (23.80% vs 22.65%); Hanersun HN21N-66HT740 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 HN21N-66HT740W and Hanersun HN18-72H585W?

Hanersun HN21N-66HT740 W has a module efficiency of 23.80%, while Hanersun HN18-72H585 W is 22.65%. 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 HN18-72H585W?

Hanersun HN21N-66HT740 W uses TOPCon cells; Hanersun HN18-72H585 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 HN18-72H585W?

Hanersun HN21N-66HT740 W has a 30 years power warranty; Hanersun HN18-72H585 W has a 25 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 HN18-72H585W bifacial panels?

Hanersun HN21N-66HT740 W is bifacial (captures light from both faces); Hanersun HN18-72H585 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.