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

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

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

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-555W and HT-SAAE HT72-18X-545W?

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

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

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

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

555 Wp 21.50 % PERC

Open panel page Datasheet PDF

HT-SAAE

HT72-18X-545W

545 Wp 21.10 % 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 555W 545W Difference

Module efficiency 21.50 % 21.10 % 0.40 pp more efficient

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

Rated power 555 Wp 545 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.

555W

17,742 kWh

545W

17,423 kWh

Lifetime gap

319 kWh

Output when it is hot

Rated power carried across the range a module actually sees

Scenario 555W 545W

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

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

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

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

Full specification

Parameter 555W 545W Difference

Power and efficiency

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

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

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

Open-circuit voltage 49.95 V 49.65 V Effectively the same

Voltage at max power 42.10 V 41.80 V Effectively the same

Short-circuit current 14.07 A 13.95 A Effectively the same

Current at max power 13.20 A 13.05 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 51.4 kg/kWp 52.3 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

14,005 panels

Efficiency

#7,958 vs #9,297

555W leads by 1,339 places

Power density

#8,148 vs #9,399

555W leads by 1,251 places

Heat behaviour

#8,545 vs #8,545

Tied - the same position in the database

Weight

#4,712 vs #5,761

555W leads by 1,049 places

Warranty

#9,798 vs #9,798

Tied - the same position in the database

Overall

#4,808 vs #5,584

555W leads by 776 places

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Written summary

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Questions about this pairing

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

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-555W and HT-SAAE HT72-18X-545W?

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

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

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

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