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66QT670W vs 66QT665W 18 of 19 identical Swap Change panels

Hanersun HN21RN-66QT670W vs Hanersun HN21RN-66QT665W

Hanersun HN21RN-66QT670W
Hanersun
HN21RN-66QT670W
670 Wp 24.80 % TOPCon Bifacial
Open panel page Datasheet PDF
VS
Hanersun HN21RN-66QT665W
Hanersun
HN21RN-66QT665W
665 Wp 24.60 % TOPCon Bifacial
Open panel page Datasheet PDF
The verdict

66QT670W 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 66QT670W 66QT665W Difference
Module efficiency 24.80 % 24.60 % 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 (-0.260 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other.
66QT670W
22,655 kWh
66QT665W
22,486 kWh
Lifetime gap
169 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario 66QT670W 66QT665W
Standard test conditions 25 °C 100.0% of rated power 670 W 665 W
Cool, bright day 40 °C 96.1% of rated power 644 W 639 W
Typical summer roof 55 °C 92.2% of rated power 618 W 613 W
Hot roof 70 °C 88.3% of rated power 592 W 587 W
03

Full specification

Parameter 66QT670W 66QT665W Difference
Power and efficiency
Rated power 670 Wp 665 Wp Effectively the same
Module efficiency 24.80 % 24.60 % +0.20 pp for 66QT670W
Power density 248.0 Wp/m² 246.2 Wp/m² Effectively the same
Open-circuit voltage 50.84 V 50.72 V Effectively the same
Voltage at max power 42.57 V 42.46 V Effectively the same
Short-circuit current 16.64 A 16.57 A Effectively the same
Current at max power 15.74 A 15.67 A Effectively the same
Temperature
Temperature coefficient -0.260 %/°C -0.260 %/°C Same
Mechanical
Dimensions 2382x1134x30 mm 2382x1134x30 mm Same
Module area 2.701 m² 2.701 m² Same
Weight 32.5 kg 32.5 kg Same
Weight per kWp 48.5 kg/kWp 48.9 kg/kWp Effectively the same
Warranty and degradation
Product warranty 15 yrs 15 yrs Same
Performance warranty 30 yrs 30 yrs Same
Annual degradation 0.35 %/yr 0.35 %/yr Same
Technology
Cell technology TOPCon TOPCon Same
Cell type Monocrystalline Monocrystalline Same
Cell count 264 264 Same
Bifacial Yes Yes Same
04

Against the whole database

14,005 panels
Efficiency
#12 vs #51
66QT670W leads by 39 places
Power density
#14 vs #42
66QT670W leads by 28 places
Heat behaviour
#511 vs #511
Tied - the same position in the database
Weight
#2,321 vs #2,555
66QT670W leads by 234 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#297 vs #409
66QT670W leads by 112 places
05

More useful comparisons

Open the full database
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Hanersun HN21RN-66QT670W vs Hanersun HN21N-66HT750W
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Hanersun HN21RN-66QT670W vs Hanersun HN21N-66HT745W
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Hanersun
Hanersun HN21RN-66QT670W vs Hanersun HN21N-66HT740W
13 differences, the largest is module efficiency
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Hanersun
Hanersun HN21RN-66QT670W vs Hanersun HN21N-66HT735W
13 differences, the largest is module efficiency
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Hanersun
Hanersun HN21RN-66QT670W vs Hanersun HN21RN-66QT660W
3 differences, the largest is module efficiency
Same series, other bin
Hanersun
Hanersun HN21RN-66QT670W vs Hanersun HN21RN-66QT655W
3 differences, the largest is module efficiency
06

Written summary

07

Questions about this pairing

Which panel is better: Hanersun HN21RN-66QT670W or Hanersun HN21RN-66QT665W?
According to our database: Hanersun HN21RN-66QT670 W has higher module efficiency (24.80% vs 24.60%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Hanersun HN21RN-66QT670W and Hanersun HN21RN-66QT665W?
Hanersun HN21RN-66QT670 W has a module efficiency of 24.80%, while Hanersun HN21RN-66QT665 W is 24.60%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Hanersun HN21RN-66QT670W use vs Hanersun HN21RN-66QT665W?
Hanersun HN21RN-66QT670 W uses TOPCon cells; Hanersun HN21RN-66QT665 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 HN21RN-66QT670W and Hanersun HN21RN-66QT665W?
Hanersun HN21RN-66QT670 W has a 30 years power warranty; Hanersun HN21RN-66QT665 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 HN21RN-66QT670W and Hanersun HN21RN-66QT665W bifacial panels?
Both Hanersun HN21RN-66QT670 W and Hanersun HN21RN-66QT665 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.