210(ND)-F 700W vs 18X(ND)-F 620W 11 of 19 identical Swap Change panels

HT-SAAE HT66-210(ND)-F 700W vs HT-SAAE HT66-18X(ND)-F 620W

Q: Which panel is better: HT-SAAE HT66-210(ND)-F 700W or HT-SAAE HT66-18X(ND)-F 620W?

According to our database: HT-SAAE HT66-18X(ND)-F 620W has higher module efficiency (23.00% vs 22.50%). See the full spec comparison and 30-year energy simulation above for a complete picture.

Q: What is the efficiency of HT-SAAE HT66-210(ND)-F 700W and HT-SAAE HT66-18X(ND)-F 620W?

HT-SAAE HT66-210(ND)-F 700W has a module efficiency of 22.50%, while HT-SAAE HT66-18X(ND)-F 620W is 23.00%. Higher efficiency means more electricity from the same roof area - useful when space is limited.

Q: What cell technology does HT-SAAE HT66-210(ND)-F 700W use vs HT-SAAE HT66-18X(ND)-F 620W?

HT-SAAE HT66-210(ND)-F 700W uses TOPCon cells; HT-SAAE HT66-18X(ND)-F 620W 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 HT-SAAE HT66-210(ND)-F 700W and HT-SAAE HT66-18X(ND)-F 620W?

HT-SAAE HT66-210(ND)-F 700W has a 30 years power warranty; HT-SAAE HT66-18X(ND)-F 620W 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 HT-SAAE HT66-210(ND)-F 700W and HT-SAAE HT66-18X(ND)-F 620W bifacial panels?

Both HT-SAAE HT66-210(ND)-F 700W and HT-SAAE HT66-18X(ND)-F 620W 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.

HT-SAAE

HT66-210(ND)-F 700W

700 Wp 22.50 % TOPCon Bifacial

Open panel page Datasheet PDF

HT-SAAE

HT66-18X(ND)-F 620W

620 Wp 23.00 % TOPCon Bifacial

Open panel page Datasheet PDF

The verdict

18X(ND)-F 620W leads on the differences that matter

The largest is rated power: 80 W more power. 11 of 19 comparable parameters are identical.

See all 8 differences

How alike are they

11 of 19 comparable
parameters are identical

identical differs

What actually differs

8 of 19 parameters

Parameter 210(ND)-F 700W 18X(ND)-F 620W Difference

Rated power 700 Wp 620 Wp 80 W more power

Module efficiency 22.50 % 23.00 % 0.50 pp more efficient

Weight 38.5 kg 33.5 kg 5.0 kg lighter

Short-circuit current 18.37 A 16.15 A 2.22 A apart

Module area 3.106 m² 2.701 m² 0.405 m² apart

Power density 225.3 Wp/m² 229.5 Wp/m² 4.2 Wp/m² higher

Current at max power 17.12 A 15.43 A 1.69 A apart

Dimensions 2384x1303x35 mm 2382x1134x35 mm 2384x1303x35 mm vs 2382x1134x35 mm

What it means on a roof

Thirty years of production

Declared annual degradation, with a 1.0% first-year loss assumed for both panels because at least one datasheet omits it, at 1,200 kWh/kWp a year

Cell temperature

Same temp coeff. for both panels (-0.310 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other.

210(ND)-F 700W

23,486 kWh

18X(ND)-F 620W

20,802 kWh

Lifetime gap

2,684 kWh

Output when it is hot

Rated power carried across the range a module actually sees

Scenario 210(ND)-F 700W 18X(ND)-F 620W

Standard test conditions 25 °C 100.0% of rated power 700 W 620 W

Cool, bright day 40 °C 95.3% of rated power 667 W 591 W

Typical summer roof 55 °C 90.7% of rated power 635 W 562 W

Hot roof 70 °C 86.0% of rated power 602 W 534 W

Full specification

Parameter 210(ND)-F 700W 18X(ND)-F 620W Difference

Power and efficiency

Rated power 700 Wp 620 Wp +80 W for 210(ND)-F 700W

Module efficiency 22.50 % 23.00 % +0.50 pp for 18X(ND)-F 620W

Power density 225.3 Wp/m² 229.5 Wp/m² +4.2 Wp/m² for 18X(ND)-F 620W

Open-circuit voltage 47.80 V 48.30 V Effectively the same

Voltage at max power 40.90 V 40.20 V Effectively the same

Short-circuit current 18.37 A 16.15 A 2.22 A apart

Current at max power 17.12 A 15.43 A 1.69 A apart

Temperature

Temperature coefficient -0.310 %/°C -0.310 %/°C Same

Mechanical

Dimensions 2384x1303x35 mm 2382x1134x35 mm 2384x1303x35 mm vs 2382x1134x35 mm

Module area 3.106 m² 2.701 m² 0.405 m² apart

Weight 38.5 kg 33.5 kg -5.0 kg for 18X(ND)-F 620W

Weight per kWp 55.0 kg/kWp 54.0 kg/kWp Effectively the same

Warranty and degradation

Product warranty 30 yrs 30 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

Against the whole database

14,129 panels

Efficiency

#4,281 vs #1,970

18X(ND)-F 620W leads by 2,311 places

Power density

#4,048 vs #2,243

18X(ND)-F 620W leads by 1,805 places

Heat behaviour

#8,069 vs #8,069

Tied - the same position in the database

Weight

#9,445 vs #8,326

18X(ND)-F 620W leads by 1,119 places

Warranty

#21 vs #21

Tied - the same position in the database

Overall

#120 vs #538

210(ND)-F 700W leads by 418 places

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HT-SAAE HT66-18X(ND)-F 620W vs HT-SAAE HT66-18X(ND)-F-620

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Written summary

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Questions about this pairing

Which panel is better: HT-SAAE HT66-210(ND)-F 700W or HT-SAAE HT66-18X(ND)-F 620W?

According to our database: HT-SAAE HT66-18X(ND)-F 620 W has higher module efficiency (23.00% vs 22.50%). 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 700W and HT-SAAE HT66-18X(ND)-F 620W?

HT-SAAE HT66-210(ND)-F 700 W has a module efficiency of 22.50%, while HT-SAAE HT66-18X(ND)-F 620 W is 23.00%. 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 700W use vs HT-SAAE HT66-18X(ND)-F 620W?

HT-SAAE HT66-210(ND)-F 700 W uses TOPCon cells; HT-SAAE HT66-18X(ND)-F 620 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 HT-SAAE HT66-210(ND)-F 700W and HT-SAAE HT66-18X(ND)-F 620W?

HT-SAAE HT66-210(ND)-F 700 W has a 30 years power warranty; HT-SAAE HT66-18X(ND)-F 620 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 HT-SAAE HT66-210(ND)-F 700W and HT-SAAE HT66-18X(ND)-F 620W bifacial panels?

Both HT-SAAE HT66-210(ND)-F 700 W and HT-SAAE HT66-18X(ND)-F 620 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.

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.