545W vs 555W 16 of 19 identical Swap Change panels

HT-SAAE HT72-18X-545W vs HT-SAAE HT72-18X-555W

Q: Which panel is better: HT-SAAE HT72-18X-545W or HT-SAAE HT72-18X-555W?

According to our database: HT-SAAE HT72-18X-555W has higher module efficiency (21.50% vs 21.10%). See the full spec comparison and 30-year energy simulation above for a complete picture.

Q: What is the efficiency of HT-SAAE HT72-18X-545W and HT-SAAE HT72-18X-555W?

HT-SAAE HT72-18X-545W has a module efficiency of 21.10%, while HT-SAAE HT72-18X-555W is 21.50%. Higher efficiency means more electricity from the same roof area - useful when space is limited.

Q: What cell technology does HT-SAAE HT72-18X-545W use vs HT-SAAE HT72-18X-555W?

HT-SAAE HT72-18X-545W uses PERC cells; HT-SAAE HT72-18X-555W uses PERC. 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 HT72-18X-545W and HT-SAAE HT72-18X-555W?

HT-SAAE HT72-18X-545W has a 25 years power warranty; HT-SAAE HT72-18X-555W has a 25 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.

HT-SAAE

HT72-18X-545W

545 Wp 21.10 % PERC

Open panel page Datasheet PDF

HT-SAAE

HT72-18X-555W

555 Wp 21.50 % PERC

Open panel page Datasheet PDF

The verdict

555W 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

What actually differs

3 of 19 parameters

Parameter 545W 555W Difference

Module efficiency 21.10 % 21.50 % 0.40 pp more efficient

Power density 210.9 Wp/m² 214.8 Wp/m² 3.9 Wp/m² higher

Rated power 545 Wp 555 Wp 10 W more power

What it means on a roof

Thirty years of production

Each panel's own declared degradation curve, at 1,200 kWh/kWp a year

Cell temperature

Same temp coeff. for both panels (-0.330 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other.

545W

17,423 kWh

555W

17,742 kWh

Lifetime gap

319 kWh

Output when it is hot

Rated power carried across the range a module actually sees

Scenario 545W 555W

Standard test conditions 25 °C 100.0% of rated power 545 W 555 W

Cool, bright day 40 °C 95.0% of rated power 518 W 528 W

Typical summer roof 55 °C 90.1% of rated power 491 W 500 W

Hot roof 70 °C 85.2% of rated power 464 W 473 W

Full specification

Parameter 545W 555W Difference

Power and efficiency

Rated power 545 Wp 555 Wp +10 W for 555W

Module efficiency 21.10 % 21.50 % +0.40 pp for 555W

Power density 210.9 Wp/m² 214.8 Wp/m² +3.9 Wp/m² for 555W

Open-circuit voltage 49.65 V 49.95 V Effectively the same

Voltage at max power 41.80 V 42.10 V Effectively the same

Short-circuit current 13.95 A 14.07 A Effectively the same

Current at max power 13.05 A 13.20 A Effectively the same

Temperature

Temperature coefficient -0.330 %/°C -0.330 %/°C Same

Mechanical

Dimensions 2279x1134x35 mm 2279x1134x35 mm Same

Module area 2.584 m² 2.584 m² Same

Weight 28.5 kg 28.5 kg Same

Weight per kWp 52.3 kg/kWp 51.4 kg/kWp Effectively the same

Warranty and degradation

Product warranty 25 yrs 25 yrs Same

Performance warranty 25 yrs 25 yrs Same

Annual degradation 0.60 %/yr 0.60 %/yr Same

Technology

Cell technology PERC PERC Same

Cell type Monocrystalline Monocrystalline Same

Cell count 144 144 Same

Bifacial No No Same

Against the whole database

14,129 panels

Efficiency

#9,365 vs #8,022

555W leads by 1,343 places

Power density

#9,467 vs #8,213

555W leads by 1,254 places

Heat behaviour

#8,613 vs #8,613

Tied - the same position in the database

Weight

#5,806 vs #4,736

555W leads by 1,070 places

Warranty

#9,912 vs #9,912

Tied - the same position in the database

Overall

#5,647 vs #4,868

555W leads by 779 places

More useful comparisons

Open the full database

Same series, other bin

HT-SAAE

HT-SAAE HT72-18X-545W vs HT-SAAE HT72-18X 560W

3 differences, the largest is module efficiency

Same series, other bin

HT-SAAE

HT-SAAE HT72-18X-545W vs HT-SAAE HT72-18X-560W

4 differences, the largest is module efficiency

Same series, other bin

HT-SAAE

HT-SAAE HT72-18X-545W vs HT-SAAE HT72-18X 555W

3 differences, the largest is module efficiency

Same series, other bin

HT-SAAE

HT-SAAE HT72-18X-545W vs HT-SAAE HT72-18X 550W

One difference: module efficiency

Same series, other bin

HT-SAAE

HT-SAAE HT72-18X-545W vs HT-SAAE HT72-18X-550W

One difference: module efficiency

Same series, other bin

HT-SAAE

HT-SAAE HT72-18X-545W vs HT-SAAE HT72-18X 545W

The same specification on paper

Written summary

Checking cache...

Questions about this pairing

Which panel is better: HT-SAAE HT72-18X-545W or HT-SAAE HT72-18X-555W?

According to our database: HT-SAAE HT72-18X-555 W has higher module efficiency (21.50% vs 21.10%). See the full spec comparison and 30-year energy simulation above for a complete picture.

What is the efficiency of HT-SAAE HT72-18X-545W and HT-SAAE HT72-18X-555W?

HT-SAAE HT72-18X-545 W has a module efficiency of 21.10%, while HT-SAAE HT72-18X-555 W is 21.50%. Higher efficiency means more electricity from the same roof area - useful when space is limited.

What cell technology does HT-SAAE HT72-18X-545W use vs HT-SAAE HT72-18X-555W?

HT-SAAE HT72-18X-545 W uses PERC cells; HT-SAAE HT72-18X-555 W uses PERC. 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 HT72-18X-545W and HT-SAAE HT72-18X-555W?

HT-SAAE HT72-18X-545 W has a 25 years power warranty; HT-SAAE HT72-18X-555 W has a 25 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.

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.