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425W vs 455W 11 of 19 identical Swap Change panels

HT-SAAE HT54-18X(ND)-F 425W vs HT-SAAE HT54-18X(ND)-F 455W

HT-SAAE HT54-18X(ND)-F 425W
HT-SAAE
HT54-18X(ND)-F 425W
425 Wp 21.80 % TOPCon Bifacial
Open panel page Datasheet PDF
VS
HT-SAAE HT54-18X(ND)-F 455W
HT-SAAE
HT54-18X(ND)-F 455W
455 Wp 22.80 % TOPCon Bifacial
Open panel page Datasheet PDF
The verdict

455W leads on the differences that matter

The largest is module efficiency: 1.00 pp more efficient. 11 of 19 comparable parameters are identical.

See all 8 differences
How alike are they
11 of 19 comparable
parameters are identical
identical differs
01

What actually differs

8 of 19 parameters
Parameter 425W 455W Difference
Module efficiency 21.80 % 22.80 % 1.00 pp more efficient
Power density 217.6 Wp/m² 227.7 Wp/m² 10.1 Wp/m² higher
Rated power 425 Wp 455 Wp 30 W more power
Module area 1.953 m² 1.998 m² 0.045 m² apart
Weight 24.0 kg 25.0 kg 1.0 kg lighter
Dimensions 1722x1134x30 mm 1762x1134x30 mm 1722x1134x30 mm vs 1762x1134x30 mm
Voltage at max power 31.70 V 32.70 V 1.00 V apart
Current at max power 13.42 A 13.92 A 0.50 A apart
02

What it means on a roof

Thirty years of production
Each panel's own declared degradation curve, 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.
425W
14,260 kWh
455W
15,266 kWh
Lifetime gap
1,006 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario 425W 455W
Standard test conditions 25 °C 100.0% of rated power 425 W 455 W
Cool, bright day 40 °C 95.3% of rated power 405 W 434 W
Typical summer roof 55 °C 90.7% of rated power 385 W 413 W
Hot roof 70 °C 86.0% of rated power 366 W 392 W
03

Full specification

Parameter 425W 455W Difference
Power and efficiency
Rated power 425 Wp 455 Wp +30 W for 455W
Module efficiency 21.80 % 22.80 % +1.00 pp for 455W
Power density 217.6 Wp/m² 227.7 Wp/m² +10.1 Wp/m² for 455W
Open-circuit voltage 38.20 V 39.10 V Effectively the same
Voltage at max power 31.70 V 32.70 V 1.00 V apart
Short-circuit current 14.15 A 14.61 A Effectively the same
Current at max power 13.42 A 13.92 A 0.50 A apart
Temperature
Temperature coefficient -0.310 %/°C -0.310 %/°C Same
Mechanical
Dimensions 1722x1134x30 mm 1762x1134x30 mm 1722x1134x30 mm vs 1762x1134x30 mm
Module area 1.953 m² 1.998 m² 0.045 m² apart
Weight 24.0 kg 25.0 kg -1.0 kg for 425W
Weight per kWp 56.5 kg/kWp 54.9 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 108 108 Same
Bifacial Yes Yes Same
04

Against the whole database

14,005 panels
Efficiency
#7,022 vs #2,714
455W leads by 4,308 places
Power density
#7,172 vs #2,888
455W leads by 4,284 places
Heat behaviour
#8,005 vs #8,005
Tied - the same position in the database
Weight
#10,661 vs #9,326
455W leads by 1,335 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#6,929 vs #4,727
455W leads by 2,202 places
05

More useful comparisons

Open the full database
Same series, other bin
HT-SAAE
HT-SAAE HT54-18X(ND)-F 425W vs HT-SAAE HT54-18X(ND)-F 460W
11 differences, the largest is module efficiency
Same series, other bin
HT-SAAE
HT-SAAE HT54-18X(ND)-F 425W vs HT-SAAE HT54-18X(ND)-F 450W
6 differences, the largest is module efficiency
Same series, other bin
HT-SAAE
HT-SAAE HT54-18X(ND)-F 425W vs HT-SAAE HT54-18X(ND)-F 445W
6 differences, the largest is module efficiency
Same series, other bin
HT-SAAE
HT-SAAE HT54-18X(ND)-F 425W vs HT-SAAE HT54-18X(ND)-F 440W
5 differences, the largest is rated power
Same series, other bin
HT-SAAE
HT-SAAE HT54-18X(ND)-F 425W vs HT-SAAE HT54-18X(ND)-F 435W
3 differences, the largest is module efficiency
Same series, other bin
HT-SAAE
HT-SAAE HT54-18X(ND)-F 425W vs HT-SAAE HT54-18X(ND)-F 430W
One difference: module efficiency
06

Written summary

07

Questions about this pairing

Which panel is better: HT-SAAE HT54-18X(ND)-F 425W or HT-SAAE HT54-18X(ND)-F 455W?
According to our database: HT-SAAE HT54-18X(ND)-F 455 W has higher module efficiency (22.80% vs 21.80%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of HT-SAAE HT54-18X(ND)-F 425W and HT-SAAE HT54-18X(ND)-F 455W?
HT-SAAE HT54-18X(ND)-F 425 W has a module efficiency of 21.80%, while HT-SAAE HT54-18X(ND)-F 455 W is 22.80%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does HT-SAAE HT54-18X(ND)-F 425W use vs HT-SAAE HT54-18X(ND)-F 455W?
HT-SAAE HT54-18X(ND)-F 425 W uses TOPCon cells; HT-SAAE HT54-18X(ND)-F 455 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 HT54-18X(ND)-F 425W and HT-SAAE HT54-18X(ND)-F 455W?
HT-SAAE HT54-18X(ND)-F 425 W has a 30 years power warranty; HT-SAAE HT54-18X(ND)-F 455 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 HT54-18X(ND)-F 425W and HT-SAAE HT54-18X(ND)-F 455W bifacial panels?
Both HT-SAAE HT54-18X(ND)-F 425 W and HT-SAAE HT54-18X(ND)-F 455 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.