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610W vs 620W 16 of 19 identical Swap Change panels

HT-SAAE HT66-18X(ND)-F 610W vs HT-SAAE HT66-18X(ND)-F 620W

HT-SAAE
HT66-18X(ND)-F 610W
610 Wp 22.60 % TOPCon Bifacial
Open panel page Datasheet PDF
VS
HT-SAAE
HT66-18X(ND)-F 620W
620 Wp 23.00 % TOPCon Bifacial
Open panel page Datasheet PDF
The verdict

620W leads on the differences that matter

The largest is module efficiency: 0.40 pp more efficient. 16 of 19 comparable parameters are identical.

See all 3 differences
How alike are they
16 of 19 comparable
parameters are identical
identical differs
01

What actually differs

3 of 19 parameters
Parameter 610W 620W Difference
Module efficiency 22.60 % 23.00 % 0.40 pp more efficient
Power density 225.8 Wp/m² 229.5 Wp/m² 3.7 Wp/m² higher
Rated power 610 Wp 620 Wp 10 W more power
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.
610W
20,467 kWh
620W
20,802 kWh
Lifetime gap
335 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario 610W 620W
Standard test conditions 25 °C 100.0% of rated power 610 W 620 W
Cool, bright day 40 °C 95.3% of rated power 582 W 591 W
Typical summer roof 55 °C 90.7% of rated power 553 W 562 W
Hot roof 70 °C 86.0% of rated power 525 W 534 W
03

Full specification

Parameter 610W 620W Difference
Power and efficiency
Rated power 610 Wp 620 Wp +10 W for 620W
Module efficiency 22.60 % 23.00 % +0.40 pp for 620W
Power density 225.8 Wp/m² 229.5 Wp/m² +3.7 Wp/m² for 620W
Open-circuit voltage 47.90 V 48.30 V Effectively the same
Voltage at max power 39.80 V 40.20 V Effectively the same
Short-circuit current 16.05 A 16.15 A Effectively the same
Current at max power 15.33 A 15.43 A Effectively the same
Temperature
Temperature coefficient -0.310 %/°C -0.310 %/°C Same
Mechanical
Dimensions 2382x1134x35 mm 2382x1134x35 mm Same
Module area 2.701 m² 2.701 m² Same
Weight 33.5 kg 33.5 kg Same
Weight per kWp 54.9 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
04

Against the whole database

14,129 panels
Efficiency
#3,716 vs #1,970
620W leads by 1,746 places
Power density
#3,788 vs #2,243
620W leads by 1,545 places
Heat behaviour
#8,069 vs #8,069
Tied - the same position in the database
Weight
#9,375 vs #8,326
620W leads by 1,049 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#917 vs #538
620W leads by 379 places
05

More useful comparisons

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

Written summary

07

Questions about this pairing

Which panel is better: HT-SAAE HT66-18X(ND)-F 610W 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 22.60%). 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 610W and HT-SAAE HT66-18X(ND)-F 620W?
HT-SAAE HT66-18X(ND)-F 610 W has a module efficiency of 22.60%, 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 HT66-18X(ND)-F 610W use vs HT-SAAE HT66-18X(ND)-F 620W?
HT-SAAE HT66-18X(ND)-F 610 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 HT66-18X(ND)-F 610W and HT-SAAE HT66-18X(ND)-F 620W?
HT-SAAE HT66-18X(ND)-F 610 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 HT66-18X(ND)-F 610W and HT-SAAE HT66-18X(ND)-F 620W bifacial panels?
Both HT-SAAE HT66-18X(ND)-F 610 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.