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410C-BD vs 420C-BD 13 of 16 identical Swap Change panels

Solaria Solaria PowerXT-410C-BD vs Solaria Solaria PowerXT-420C-BD

Solaria
Solaria PowerXT-410C-BD
410 Wp 18.90 % Incomplete
Open panel page Datasheet PDF
VS
Solaria
Solaria PowerXT-420C-BD
420 Wp 19.40 % Incomplete
Open panel page Datasheet PDF
The verdict

420C-BD leads on the differences that matter

The largest is module efficiency: 0.50 pp more efficient. 13 of 16 comparable parameters are identical, with 3 more left out because at least one datasheet does not publish them.

See all 3 differences
How alike are they
13 of 16 comparable
parameters are identical
identical differs not published
01

What actually differs

3 of 16 parameters
Parameter 410C-BD 420C-BD Difference
Module efficiency 18.90 % 19.40 % 0.50 pp more efficient
Power density 189.5 Wp/m² 194.1 Wp/m² 4.6 Wp/m² higher
Rated power 410 Wp 420 Wp 10 W more power
02

What it means on a roof

Thirty years of production
A 1.0% first-year loss then 0.40% a year, assumed for both panels, at 1,200 kWh/kWp a year
Same temp coeff. for both panels (-0.390 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other.
410C-BD
13,756 kWh
420C-BD
14,092 kWh
Lifetime gap
336 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario 410C-BD 420C-BD
Standard test conditions 25 °C 100.0% of rated power 410 W 420 W
Cool, bright day 40 °C 94.2% of rated power 386 W 395 W
Typical summer roof 55 °C 88.3% of rated power 362 W 371 W
Hot roof 70 °C 82.5% of rated power 338 W 346 W
03

Full specification

Parameter 410C-BD 420C-BD Difference
Power and efficiency
Rated power 410 Wp 420 Wp +10 W for 420C-BD
Module efficiency 18.90 % 19.40 % +0.50 pp for 420C-BD
Power density 189.5 Wp/m² 194.1 Wp/m² +4.6 Wp/m² for 420C-BD
Open-circuit voltage 47.20 V 47.40 V Effectively the same
Voltage at max power 38.50 V 39.10 V Effectively the same
Short-circuit current 11.29 A 11.33 A Effectively the same
Current at max power 10.66 A 10.77 A Effectively the same
Temperature
Temperature coefficient -0.390 %/°C -0.390 %/°C Same
Mechanical
Dimensions 1939x1116x40 mm 1939x1116x40 mm Same
Module area 2.164 m² 2.164 m² Same
Weight 29.0 kg 29.0 kg Same
Weight per kWp 70.7 kg/kWp 69.0 kg/kWp Effectively the same
Warranty and degradation
Product warranty 25 yrs 25 yrs Same
Performance warranty 25 yrs 25 yrs Same
Annual degradation - - Neither datasheet publishes this
Technology
Cell technology - - Neither datasheet publishes this
Cell type Monocrystalline Monocrystalline Same
Cell count - - Neither datasheet publishes this
Bifacial No No Same
04

Against the whole database

14,005 panels
Efficiency
#12,996 vs #12,735
420C-BD leads by 261 places
Power density
#12,969 vs #12,726
420C-BD leads by 243 places
Heat behaviour
#13,579 vs #13,579
Tied - the same position in the database
Weight
#13,437 vs #13,359
420C-BD leads by 78 places
Warranty
#9,798 vs #9,798
Tied - the same position in the database
Overall
#11,707 vs #11,183
420C-BD leads by 524 places
05

More useful comparisons

Open the full database
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Solaria Solaria PowerXT-410C-BD vs Solaria Solaria PowerXT-420C-PD
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Solaria Solaria PowerXT-410C-BD vs Solaria SPV680-TG12-132BD
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Solaria Solaria PowerXT-410C-BD vs Solaria SPV670-TG12-132BD
13 differences, the largest is module efficiency
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Solaria Solaria PowerXT-410C-BD vs Solaria SPV665-TG12-132BD
13 differences, the largest is module efficiency
06

Written summary

07

Questions about this pairing

Which panel is better: Solaria Solaria PowerXT-410C-BD or Solaria Solaria PowerXT-420C-BD?
According to our database: Solaria Solaria PowerXT-420C-BD has higher module efficiency (19.40% vs 18.90%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Solaria Solaria PowerXT-410C-BD and Solaria Solaria PowerXT-420C-BD?
Solaria Solaria PowerXT-410C-BD has a module efficiency of 18.90%, while Solaria Solaria PowerXT-420C-BD is 19.40%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Solaria Solaria PowerXT-410C-BD use vs Solaria Solaria PowerXT-420C-BD?
Solaria Solaria PowerXT-410C-BD uses Monocrystalline cells; Solaria Solaria PowerXT-420C-BD uses Monocrystalline. 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 Solaria Solaria PowerXT-410C-BD and Solaria Solaria PowerXT-420C-BD?
Solaria Solaria PowerXT-410C-BD has a 25 years power warranty; Solaria Solaria PowerXT-420C-BD 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.

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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.