420W vs 405W 16 of 19 identical Swap Change panels

Lexron 420W vs Lexron 405W

Q: Which panel is better: Lexron 420W or Lexron 405W?

According to our database: Lexron 420W has higher module efficiency (21.12% vs 20.36%). See the full spec comparison and 30-year energy simulation above for a complete picture.

Q: What is the efficiency of Lexron 420W and Lexron 405W?

Lexron 420W has a module efficiency of 21.12%, while Lexron 405W is 20.36%. Higher efficiency means more electricity from the same roof area - useful when space is limited.

Q: What cell technology does Lexron 420W use vs Lexron 405W?

Lexron 420W uses PERC cells; Lexron 405W 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 Lexron 420W and Lexron 405W?

Lexron 420W has a 30 years power warranty; Lexron 405W 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.

Lexron

420W

420 Wp 21.12 % PERC

Open panel page Datasheet PDF

Lexron

405W

405 Wp 20.36 % PERC

Open panel page Datasheet PDF

The verdict

420W leads on the differences that matter

The largest is module efficiency: 0.76 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 420W 405W Difference

Module efficiency 21.12 % 20.36 % 0.76 pp more efficient

Power density 211.2 Wp/m² 203.6 Wp/m² 7.5 Wp/m² higher

Rated power 420 Wp 405 Wp 15 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 (-0.350 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other.

420W

13,831 kWh

405W

13,337 kWh

Lifetime gap

494 kWh

Output when it is hot

Rated power carried across the range a module actually sees

Scenario 420W 405W

Standard test conditions 25 °C 100.0% of rated power 420 W 405 W

Cool, bright day 40 °C 94.8% of rated power 398 W 384 W

Typical summer roof 55 °C 89.5% of rated power 376 W 362 W

Hot roof 70 °C 84.2% of rated power 354 W 341 W

Full specification

Parameter 420W 405W Difference

Power and efficiency

Rated power 420 Wp 405 Wp +15 W for 420W

Module efficiency 21.12 % 20.36 % +0.76 pp for 420W

Power density 211.2 Wp/m² 203.6 Wp/m² +7.5 Wp/m² for 420W

Open-circuit voltage 50.20 V 49.66 V Effectively the same

Voltage at max power 41.83 V 41.38 V Effectively the same

Short-circuit current 10.59 A 10.32 A Effectively the same

Current at max power 10.04 A 9.79 A Effectively the same

Temperature

Temperature coefficient -0.350 %/°C -0.350 %/°C Same

Mechanical

Dimensions 1987x1001x35 mm 1987x1001x35 mm Same

Module area 1.989 m² 1.989 m² Same

Weight 22.0 kg 22.0 kg Same

Weight per kWp 52.4 kg/kWp 54.3 kg/kWp Effectively the same

Warranty and degradation

Product warranty 12 yrs 12 yrs Same

Performance warranty 30 yrs 30 yrs Same

Annual degradation 0.45 %/yr 0.45 %/yr Same

Technology

Cell technology PERC PERC Same

Cell type Monocrystalline Monocrystalline Same

Cell count 72 72 Same

Bifacial No No Same

Against the whole database

14,005 panels

Efficiency

#9,255 vs #11,709

420W leads by 2,454 places

Power density

#9,255 vs #11,674

420W leads by 2,419 places

Heat behaviour

#10,419 vs #10,419

Tied - the same position in the database

Weight

#5,859 vs #8,586

420W leads by 2,727 places

Warranty

#21 vs #21

Tied - the same position in the database

Overall

#10,850 vs #11,615

420W leads by 765 places

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Written summary

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Questions about this pairing

Which panel is better: Lexron 420W or Lexron 405W?

According to our database: Lexron 420 W has higher module efficiency (21.12% vs 20.36%). See the full spec comparison and 30-year energy simulation above for a complete picture.

What is the efficiency of Lexron 420W and Lexron 405W?

Lexron 420 W has a module efficiency of 21.12%, while Lexron 405 W is 20.36%. Higher efficiency means more electricity from the same roof area - useful when space is limited.

What cell technology does Lexron 420W use vs Lexron 405W?

Lexron 420 W uses PERC cells; Lexron 405 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 Lexron 420W and Lexron 405W?

Lexron 420 W has a 30 years power warranty; Lexron 405 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.

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.