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F-605 vs F 620W 16 of 19 identical Swap Change panels

HT-SAAE HT66-18X(ND)-F-605 vs HT-SAAE HT66-18X(ND)-F 620W

HT-SAAE
HT66-18X(ND)-F-605
605 Wp 22.40 % 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

F 620W leads on the differences that matter

The largest is module efficiency: 0.60 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 F-605 F 620W Difference
Module efficiency 22.40 % 23.00 % 0.60 pp more efficient
Power density 224.0 Wp/m² 229.5 Wp/m² 5.6 Wp/m² higher
Rated power 605 Wp 620 Wp 15 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.
F-605
20,299 kWh
F 620W
20,802 kWh
Lifetime gap
503 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario F-605 F 620W
Standard test conditions 25 °C 100.0% of rated power 605 W 620 W
Cool, bright day 40 °C 95.3% of rated power 577 W 591 W
Typical summer roof 55 °C 90.7% of rated power 549 W 562 W
Hot roof 70 °C 86.0% of rated power 521 W 534 W
03

Full specification

Parameter F-605 F 620W Difference
Power and efficiency
Rated power 605 Wp 620 Wp +15 W for F 620W
Module efficiency 22.40 % 23.00 % +0.60 pp for F 620W
Power density 224.0 Wp/m² 229.5 Wp/m² +5.6 Wp/m² for F 620W
Open-circuit voltage 47.70 V 48.30 V Effectively the same
Voltage at max power 39.60 V 40.20 V Effectively the same
Short-circuit current 16.00 A 16.15 A Effectively the same
Current at max power 15.28 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 55.4 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
#4,834 vs #1,970
F 620W leads by 2,864 places
Power density
#4,841 vs #2,243
F 620W leads by 2,598 places
Heat behaviour
#8,069 vs #8,069
Tied - the same position in the database
Weight
#9,888 vs #8,326
F 620W leads by 1,562 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#1,121 vs #538
F 620W leads by 583 places
05

More useful comparisons

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

Written summary

07

Questions about this pairing

Which panel is better: HT-SAAE HT66-18X(ND)-F-605 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 22.40%). 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-605 and HT-SAAE HT66-18X(ND)-F 620W?
HT-SAAE HT66-18X(ND)-F-605 has a module efficiency of 22.40%, 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-605 use vs HT-SAAE HT66-18X(ND)-F 620W?
HT-SAAE HT66-18X(ND)-F-605 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-605 and HT-SAAE HT66-18X(ND)-F 620W?
HT-SAAE HT66-18X(ND)-F-605 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-605 and HT-SAAE HT66-18X(ND)-F 620W bifacial panels?
Both HT-SAAE HT66-18X(ND)-F-605 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.