7550A-TR1 vs 7545A-TR1 17 of 18 identical Swap Change panels

First Solar FS-7550A-TR1 vs First Solar FS-7545A-TR1

Q: Which panel is better: First Solar FS-7550A-TR1 or First Solar FS-7545A-TR1?

According to our database: First Solar FS-7550A-TR1 has higher module efficiency (19.70% vs 19.50%). See the full spec comparison and 30-year energy simulation above for a complete picture.

Q: What is the efficiency of First Solar FS-7550A-TR1 and First Solar FS-7545A-TR1?

First Solar FS-7550A-TR1 has a module efficiency of 19.70%, while First Solar FS-7545A-TR1 is 19.50%. Higher efficiency means more electricity from the same roof area - useful when space is limited.

Q: What cell technology does First Solar FS-7550A-TR1 use vs First Solar FS-7545A-TR1?

First Solar FS-7550A-TR1 uses CdTe cells; First Solar FS-7545A-TR1 uses CdTe. 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 First Solar FS-7550A-TR1 and First Solar FS-7545A-TR1?

First Solar FS-7550A-TR1 has a 30 years power warranty; First Solar FS-7545A-TR1 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.

First Solar

FS-7550A-TR1

550 Wp 19.70 % CdTe

Open panel page Datasheet PDF

First Solar

FS-7545A-TR1

545 Wp 19.50 % CdTe

Open panel page Datasheet PDF

The verdict

7550A-TR1 leads on the differences that matter

The largest is module efficiency: 0.20 pp more efficient. 17 of 18 comparable parameters are identical, with 1 more left out because at least one datasheet does not publish it.

See the one difference

How alike are they

17 of 18 comparable
parameters are identical

identical differs not published

What actually differs

1 of 18 parameters

Parameter 7550A-TR1 7545A-TR1 Difference

Module efficiency 19.70 % 19.50 % 0.20 pp more efficient

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 (-0.320 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other.

7550A-TR1

18,543 kWh

7545A-TR1

18,374 kWh

Lifetime gap

169 kWh

Output when it is hot

Rated power carried across the range a module actually sees

Scenario 7550A-TR1 7545A-TR1

Standard test conditions 25 °C 100.0% of rated power 550 W 545 W

Cool, bright day 40 °C 95.2% of rated power 524 W 519 W

Typical summer roof 55 °C 90.4% of rated power 497 W 493 W

Hot roof 70 °C 85.6% of rated power 471 W 467 W

Full specification

Parameter 7550A-TR1 7545A-TR1 Difference

Power and efficiency

Rated power 550 Wp 545 Wp Effectively the same

Module efficiency 19.70 % 19.50 % +0.20 pp for 7550A-TR1

Power density 196.7 Wp/m² 194.9 Wp/m² Effectively the same

Open-circuit voltage 228.80 V 228.20 V Effectively the same

Voltage at max power 190.40 V 189.60 V Effectively the same

Short-circuit current 3.08 A 3.07 A Effectively the same

Current at max power 2.89 A 2.88 A Effectively the same

Temperature

Temperature coefficient -0.320 %/°C -0.320 %/°C Same

Mechanical

Dimensions 2300x1216x49 mm 2300x1216x49 mm Same

Module area 2.797 m² 2.797 m² Same

Weight 39.7 kg 39.7 kg Same

Weight per kWp 72.2 kg/kWp 72.8 kg/kWp Effectively the same

Warranty and degradation

Product warranty 12 yrs 12 yrs Same

Performance warranty 30 yrs 30 yrs Same

Annual degradation 0.30 %/yr 0.30 %/yr Same

Technology

Cell technology CdTe CdTe Same

Cell type Thin film Thin film Same

Cell count - - Neither datasheet publishes this

Bifacial No No Same

Against the whole database

14,129 panels

Efficiency

#12,596 vs #12,751

7550A-TR1 leads by 155 places

Power density

#12,632 vs #12,762

7550A-TR1 leads by 130 places

Heat behaviour

#8,376 vs #8,376

Tied - the same position in the database

Weight

#13,625 vs #13,655

7550A-TR1 leads by 30 places

Warranty

#21 vs #21

Tied - the same position in the database

Overall

#9,153 vs #9,508

7550A-TR1 leads by 355 places

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Written summary

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Questions about this pairing

Which panel is better: First Solar FS-7550A-TR1 or First Solar FS-7545A-TR1?

According to our database: First Solar FS-7550A-TR1 has higher module efficiency (19.70% vs 19.50%). See the full spec comparison and 30-year energy simulation above for a complete picture.

What is the efficiency of First Solar FS-7550A-TR1 and First Solar FS-7545A-TR1?

First Solar FS-7550A-TR1 has a module efficiency of 19.70%, while First Solar FS-7545A-TR1 is 19.50%. Higher efficiency means more electricity from the same roof area - useful when space is limited.

What cell technology does First Solar FS-7550A-TR1 use vs First Solar FS-7545A-TR1?

First Solar FS-7550A-TR1 uses CdTe cells; First Solar FS-7545A-TR1 uses CdTe. 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 First Solar FS-7550A-TR1 and First Solar FS-7545A-TR1?

First Solar FS-7550A-TR1 has a 30 years power warranty; First Solar FS-7545A-TR1 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.

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.