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HT66-210(ND)-F 705W vs HT72-18X 555W 1 of 18 identical Swap Change panels

HT-SAAE HT66-210(ND)-F 705W vs HT-SAAE HT72-18X 555W

HT-SAAE HT66-210(ND)-F 705W
HT-SAAE
HT66-210(ND)-F 705W
705 Wp 22.70 % TOPCon Bifacial
Open panel page Datasheet PDF
VS
HT-SAAE
HT72-18X 555W
555 Wp 21.50 % PERC Incomplete
Open panel page Datasheet PDF
The verdict

HT66-210(ND)-F 705W leads on the differences that matter

The largest is module efficiency: 1.20 pp more efficient. 1 of 18 comparable parameters are identical, with 1 more left out because at least one datasheet does not publish it.

See all 17 differences
How alike are they
1 of 18 comparable
parameters are identical
identical differs not published
01

What actually differs

17 of 18 parameters
Parameter HT66-210(ND)-F 705W HT72-18X 555W Difference
Module efficiency 22.70 % 21.50 % 1.20 pp more efficient
Rated power 705 Wp 555 Wp 150 W more power
Power density 227.0 Wp/m² 214.8 Wp/m² 12.2 Wp/m² higher
Performance warranty 30 yrs 25 yrs 5 yrs longer
Weight 38.5 kg 28.5 kg 10.0 kg lighter
Product warranty 30 yrs 25 yrs 5 yrs longer
Temperature coefficient -0.310 %/°C -0.330 %/°C 0.020 %/°C better in heat
Short-circuit current 18.41 A 14.07 A 4.34 A apart
Module area 3.106 m² 2.584 m² 0.522 m² apart
Cell technology TOPCon PERC TOPCon vs PERC
Weight per kWp 54.6 kg/kWp 51.4 kg/kWp 3.3 kg/kWp lighter
Current at max power 17.16 A 13.20 A 3.96 A apart
Cell count 132 144 12 cells apart
Open-circuit voltage 48.00 V 49.95 V 1.95 V apart
Bifacial Yes No Yes vs No
Dimensions 2384x1303x35 mm 2279x1134x35 mm 2384x1303x35 mm vs 2279x1134x35 mm
Voltage at max power 41.10 V 42.10 V 1.00 V apart
02

What it means on a roof

Thirty years of production
Declared first-year losses, with 0.40% a year afterwards assumed for both panels, at 1,200 kWh/kWp a year
HT66-210(ND)-F 705W
23,654 kWh
HT72-18X 555W
18,322 kWh
Lifetime gap
5,332 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario HT66-210(ND)-F 705W HT72-18X 555W
Standard test conditions 25 °C 100.0% of rated power 705 W 555 W
Cool, bright day 40 °C 95.0% of rated power 672 W 528 W
Typical summer roof 55 °C 90.1% of rated power 639 W 500 W
Hot roof 70 °C 85.2% of rated power 607 W 473 W
03

Full specification

Parameter HT66-210(ND)-F 705W HT72-18X 555W Difference
Power and efficiency
Rated power 705 Wp 555 Wp +150 W for HT66-210(ND)-F 705W
Module efficiency 22.70 % 21.50 % +1.20 pp for HT66-210(ND)-F 705W
Power density 227.0 Wp/m² 214.8 Wp/m² +12.2 Wp/m² for HT66-210(ND)-F 705W
Open-circuit voltage 48.00 V 49.95 V 1.95 V apart
Voltage at max power 41.10 V 42.10 V 1.00 V apart
Short-circuit current 18.41 A 14.07 A 4.34 A apart
Current at max power 17.16 A 13.20 A 3.96 A apart
Temperature
Temperature coefficient -0.310 %/°C -0.330 %/°C +0.020 %/°C for HT66-210(ND)-F 705W
Mechanical
Dimensions 2384x1303x35 mm 2279x1134x35 mm 2384x1303x35 mm vs 2279x1134x35 mm
Module area 3.106 m² 2.584 m² 0.522 m² apart
Weight 38.5 kg 28.5 kg -10.0 kg for HT72-18X 555W
Weight per kWp 54.6 kg/kWp 51.4 kg/kWp -3.3 kg/kWp for HT72-18X 555W
Warranty and degradation
Product warranty 30 yrs 25 yrs +5 yrs for HT66-210(ND)-F 705W
Performance warranty 30 yrs 25 yrs +5 yrs for HT66-210(ND)-F 705W
Annual degradation 0.40 %/yr - Not published by HT-SAAE
Technology
Cell technology TOPCon PERC TOPCon vs PERC
Cell type Monocrystalline Monocrystalline Same
Cell count 132 144 12 cells apart
Bifacial Yes No Yes vs No
04

Against the whole database

14,129 panels
Efficiency
#3,364 vs #8,022
HT66-210(ND)-F 705W leads by 4,658 places
Power density
#3,418 vs #8,213
HT66-210(ND)-F 705W leads by 4,795 places
Heat behaviour
#8,069 vs #8,613
HT66-210(ND)-F 705W leads by 544 places
Weight
#9,041 vs #4,736
HT72-18X 555W leads by 4,305 places
Warranty
#21 vs #9,912
HT66-210(ND)-F 705W leads by 9,891 places
Overall
#85 vs #4,868
HT66-210(ND)-F 705W leads by 4,783 places
05

More useful comparisons

Open the full database
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HT-SAAE HT66-210(ND)-F 705W vs HT-SAAE HT66-210(ND)-F 715W
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HT-SAAE HT66-210(ND)-F 705W vs HT-SAAE HT66-210(ND)-F 710W
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HT-SAAE HT66-210(ND)-F 705W vs HT-SAAE HT66-210(ND)-F 700W
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HT-SAAE HT66-210(ND)-F 705W vs HT-SAAE HT66-210(ND)-F 695W
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HT-SAAE
HT-SAAE HT72-18X 555W vs HT-SAAE HT72-18X 560W
One difference: module efficiency
Same series, other bin
HT-SAAE
HT-SAAE HT72-18X 555W vs HT-SAAE HT72-18X 550W
One difference: module efficiency
06

Written summary

07

Questions about this pairing

Which panel is better: HT-SAAE HT66-210(ND)-F 705W or HT-SAAE HT72-18X 555W?
According to our database: HT-SAAE HT66-210(ND)-F 705 W has higher module efficiency (22.70% vs 21.50%); HT-SAAE HT66-210(ND)-F 705 W tolerates heat better (temp coeff -0.310%/°C vs -0.330%/°C). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of HT-SAAE HT66-210(ND)-F 705W and HT-SAAE HT72-18X 555W?
HT-SAAE HT66-210(ND)-F 705 W has a module efficiency of 22.70%, while HT-SAAE HT72-18X 555 W is 21.50%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does HT-SAAE HT66-210(ND)-F 705W use vs HT-SAAE HT72-18X 555W?
HT-SAAE HT66-210(ND)-F 705 W uses TOPCon cells; HT-SAAE HT72-18X 555 W uses PERC. 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 HT-SAAE HT66-210(ND)-F 705W and HT-SAAE HT72-18X 555W?
HT-SAAE HT66-210(ND)-F 705 W has a 30 years power warranty; HT-SAAE HT72-18X 555 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 HT-SAAE HT66-210(ND)-F 705W and HT-SAAE HT72-18X 555W bifacial panels?
HT-SAAE HT66-210(ND)-F 705 W is bifacial (captures light from both faces); HT-SAAE HT72-18X 555 W is monofacial. Bifacial panels work best on ground mounts or raised structures with a light-coloured surface underneath.

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.