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18X(ND)-F 620W vs 210(ND)-F 710W 12 of 19 identical Swap Change panels

HT-SAAE HT66-18X(ND)-F 620W vs HT-SAAE HT66-210(ND)-F 710W

HT-SAAE
HT66-18X(ND)-F 620W
620 Wp 23.00 % TOPCon Bifacial
Open panel page Datasheet PDF
VS
HT-SAAE HT66-210(ND)-F 710W
HT-SAAE
HT66-210(ND)-F 710W
710 Wp 22.90 % TOPCon Bifacial
Open panel page Datasheet PDF
The verdict

7 differences, and they point both ways

The largest is rated power: 90 W more power. 12 of 19 comparable parameters are identical.

See all 7 differences
How alike are they
12 of 19 comparable
parameters are identical
identical differs
01

What actually differs

7 of 19 parameters
Parameter 18X(ND)-F 620W 210(ND)-F 710W Difference
Rated power 620 Wp 710 Wp 90 W more power
Weight 33.5 kg 38.5 kg 5.0 kg lighter
Short-circuit current 16.15 A 18.45 A 2.30 A apart
Module area 2.701 m² 3.106 m² 0.405 m² apart
Current at max power 15.43 A 17.20 A 1.77 A apart
Dimensions 2382x1134x35 mm 2384x1303x35 mm 2382x1134x35 mm vs 2384x1303x35 mm
Voltage at max power 40.20 V 41.30 V 1.10 V apart
02

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
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.
18X(ND)-F 620W
20,802 kWh
210(ND)-F 710W
23,822 kWh
Lifetime gap
3,020 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario 18X(ND)-F 620W 210(ND)-F 710W
Standard test conditions 25 °C 100.0% of rated power 620 W 710 W
Cool, bright day 40 °C 95.3% of rated power 591 W 677 W
Typical summer roof 55 °C 90.7% of rated power 562 W 644 W
Hot roof 70 °C 86.0% of rated power 534 W 611 W
03

Full specification

Parameter 18X(ND)-F 620W 210(ND)-F 710W Difference
Power and efficiency
Rated power 620 Wp 710 Wp +90 W for 210(ND)-F 710W
Module efficiency 23.00 % 22.90 % Effectively the same
Power density 229.5 Wp/m² 228.6 Wp/m² Effectively the same
Open-circuit voltage 48.30 V 48.20 V Effectively the same
Voltage at max power 40.20 V 41.30 V 1.10 V apart
Short-circuit current 16.15 A 18.45 A 2.30 A apart
Current at max power 15.43 A 17.20 A 1.77 A apart
Temperature
Temperature coefficient -0.310 %/°C -0.310 %/°C Same
Mechanical
Dimensions 2382x1134x35 mm 2384x1303x35 mm 2382x1134x35 mm vs 2384x1303x35 mm
Module area 2.701 m² 3.106 m² 0.405 m² apart
Weight 33.5 kg 38.5 kg -5.0 kg for 18X(ND)-F 620W
Weight per kWp 54.0 kg/kWp 54.2 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
04

Against the whole database

14,129 panels
Efficiency
#1,970 vs #2,412
18X(ND)-F 620W leads by 442 places
Power density
#2,243 vs #2,529
18X(ND)-F 620W leads by 286 places
Heat behaviour
#8,069 vs #8,069
Tied - the same position in the database
Weight
#8,326 vs #8,537
18X(ND)-F 620W leads by 211 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#538 vs #58
210(ND)-F 710W leads by 480 places
05

More useful comparisons

Open the full database
Same series, other bin
HT-SAAE
HT-SAAE HT66-18X(ND)-F 620W vs HT-SAAE HT66-18X(ND)-F-620
The same specification on paper
Same series, other bin
HT-SAAE
HT-SAAE HT66-18X(ND)-F 620W vs HT-SAAE HT66-18X(ND)-F 615W
One difference: module efficiency
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HT-SAAE
HT-SAAE HT66-18X(ND)-F 620W vs HT-SAAE HT66-18X(ND)-F-615
One difference: module efficiency
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HT-SAAE
HT-SAAE HT66-18X(ND)-F 620W vs HT-SAAE HT66-18X(ND)-F 610W
3 differences, the largest is module efficiency
Same series, other bin
HT-SAAE
HT-SAAE HT66-18X(ND)-F 620W vs HT-SAAE HT66-18X(ND)-F-610
3 differences, the largest is module efficiency
Same series, other bin
HT-SAAE
HT-SAAE HT66-18X(ND)-F 620W vs HT-SAAE HT66-18X(ND)-F 605W
3 differences, the largest is module efficiency
06

Written summary

07

Questions about this pairing

Which panel is better: HT-SAAE HT66-18X(ND)-F 620W or HT-SAAE HT66-210(ND)-F 710W?
According to our database: HT-SAAE HT66-18X(ND)-F 620 W has higher module efficiency (23.00% vs 22.90%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of HT-SAAE HT66-18X(ND)-F 620W and HT-SAAE HT66-210(ND)-F 710W?
HT-SAAE HT66-18X(ND)-F 620 W has a module efficiency of 23.00%, while HT-SAAE HT66-210(ND)-F 710 W is 22.90%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does HT-SAAE HT66-18X(ND)-F 620W use vs HT-SAAE HT66-210(ND)-F 710W?
HT-SAAE HT66-18X(ND)-F 620 W uses TOPCon cells; HT-SAAE HT66-210(ND)-F 710 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 HT66-18X(ND)-F 620W and HT-SAAE HT66-210(ND)-F 710W?
HT-SAAE HT66-18X(ND)-F 620 W has a 30 years power warranty; HT-SAAE HT66-210(ND)-F 710 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 HT66-18X(ND)-F 620W and HT-SAAE HT66-210(ND)-F 710W bifacial panels?
Both HT-SAAE HT66-18X(ND)-F 620 W and HT-SAAE HT66-210(ND)-F 710 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.