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SPV680-TG12-132BD vs Solaria PowerXT-420C-BD 3 of 16 identical Swap Change panels

Solaria SPV680-TG12-132BD vs Solaria Solaria PowerXT-420C-BD

Solaria
SPV680-TG12-132BD
680 Wp 21.92 % TOPCon Bifacial Incomplete
Open panel page Datasheet PDF
VS
Solaria
Solaria PowerXT-420C-BD
420 Wp 19.40 % Incomplete
Open panel page Datasheet PDF
The verdict

SPV680-TG12-132BD leads on the differences that matter

The largest is module efficiency: 2.52 pp more efficient. 3 of 16 comparable parameters are identical, with 3 more left out because at least one datasheet does not publish them.

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

What actually differs

13 of 16 parameters
Parameter SPV680-TG12-132BD Solaria PowerXT-420C-BD Difference
Module efficiency 21.92 % 19.40 % 2.52 pp more efficient
Temperature coefficient -0.300 %/°C -0.390 %/°C 0.090 %/°C better in heat
Rated power 680 Wp 420 Wp 260 W more power
Power density 219.2 Wp/m² 194.1 Wp/m² 25.1 Wp/m² higher
Performance warranty 30 yrs 25 yrs 5 yrs longer
Weight 38.0 kg 29.0 kg 9.0 kg lighter
Weight per kWp 55.9 kg/kWp 69.0 kg/kWp 13.2 kg/kWp lighter
Product warranty 12 yrs 25 yrs 13 yrs longer
Short-circuit current 17.96 A 11.33 A 6.63 A apart
Module area 3.103 m² 2.164 m² 0.939 m² apart
Current at max power 17.18 A 10.77 A 6.41 A apart
Bifacial Yes No Yes vs No
Dimensions 2383x1302x30 mm 1939x1116x40 mm 2383x1302x30 mm vs 1939x1116x40 mm
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
SPV680-TG12-132BD
22,815 kWh
Solaria PowerXT-420C-BD
14,092 kWh
Lifetime gap
8,723 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario SPV680-TG12-132BD Solaria PowerXT-420C-BD
Standard test conditions 25 °C 100.0% of rated power 680 W 420 W
Cool, bright day 40 °C 94.2% of rated power 649 W 395 W
Typical summer roof 55 °C 88.3% of rated power 619 W 371 W
Hot roof 70 °C 82.5% of rated power 588 W 346 W
03

Full specification

Parameter SPV680-TG12-132BD Solaria PowerXT-420C-BD Difference
Power and efficiency
Rated power 680 Wp 420 Wp +260 W for SPV680-TG12-132BD
Module efficiency 21.92 % 19.40 % +2.52 pp for SPV680-TG12-132BD
Power density 219.2 Wp/m² 194.1 Wp/m² +25.1 Wp/m² for SPV680-TG12-132BD
Open-circuit voltage 46.90 V 47.40 V Effectively the same
Voltage at max power 39.63 V 39.10 V Effectively the same
Short-circuit current 17.96 A 11.33 A 6.63 A apart
Current at max power 17.18 A 10.77 A 6.41 A apart
Temperature
Temperature coefficient -0.300 %/°C -0.390 %/°C +0.090 %/°C for SPV680-TG12-132BD
Mechanical
Dimensions 2383x1302x30 mm 1939x1116x40 mm 2383x1302x30 mm vs 1939x1116x40 mm
Module area 3.103 m² 2.164 m² 0.939 m² apart
Weight 38.0 kg 29.0 kg -9.0 kg for Solaria PowerXT-420C-BD
Weight per kWp 55.9 kg/kWp 69.0 kg/kWp -13.2 kg/kWp for SPV680-TG12-132BD
Warranty and degradation
Product warranty 12 yrs 25 yrs +13 yrs for Solaria PowerXT-420C-BD
Performance warranty 30 yrs 25 yrs +5 yrs for SPV680-TG12-132BD
Annual degradation - - Neither datasheet publishes this
Technology
Cell technology TOPCon - Not published by Solaria
Cell type Monocrystalline Monocrystalline Same
Cell count 132 - Not published by Solaria
Bifacial Yes No Yes vs No
04

Against the whole database

14,005 panels
Efficiency
#6,767 vs #12,735
SPV680-TG12-132BD leads by 5,968 places
Power density
#6,738 vs #12,726
SPV680-TG12-132BD leads by 5,988 places
Heat behaviour
#6,093 vs #13,579
SPV680-TG12-132BD leads by 7,486 places
Weight
#10,244 vs #13,359
SPV680-TG12-132BD leads by 3,115 places
Warranty
#21 vs #9,798
SPV680-TG12-132BD leads by 9,777 places
Overall
#1,903 vs #11,183
SPV680-TG12-132BD leads by 9,280 places
05

More useful comparisons

Open the full database
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Solaria SPV680-TG12-132BD vs Solaria SPV675-TG12-132BD
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Solaria SPV680-TG12-132BD vs Solaria SPV670-TG12-132BD
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Solaria SPV680-TG12-132BD vs Solaria SPV665-TG12-132BD
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Solaria SPV680-TG12-132BD vs Solaria SPV660-TG12-132BD
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Solaria Solaria PowerXT-420C-BD vs Solaria Solaria PowerXT-430C-PD
3 differences, the largest is module efficiency
Same series, other bin
Solaria
Solaria Solaria PowerXT-420C-BD vs Solaria Solaria PowerXT-420C-PD
The same specification on paper
06

Written summary

07

Questions about this pairing

Which panel is better: Solaria SPV680-TG12-132BD or Solaria Solaria PowerXT-420C-BD?
According to our database: Solaria SPV680-TG12-132BD has higher module efficiency (21.92% vs 19.40%); Solaria SPV680-TG12-132BD tolerates heat better (temp coeff -0.300%/°C vs -0.390%/°C). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Solaria SPV680-TG12-132BD and Solaria Solaria PowerXT-420C-BD?
Solaria SPV680-TG12-132BD has a module efficiency of 21.92%, 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 SPV680-TG12-132BD use vs Solaria Solaria PowerXT-420C-BD?
Solaria SPV680-TG12-132BD uses TOPCon 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 SPV680-TG12-132BD and Solaria Solaria PowerXT-420C-BD?
Solaria SPV680-TG12-132BD has a 30 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.
Are Solaria SPV680-TG12-132BD and Solaria Solaria PowerXT-420C-BD bifacial panels?
Solaria SPV680-TG12-132BD is bifacial (captures light from both faces); Solaria Solaria PowerXT-420C-BD is monofacial. Bifacial panels work best on ground mounts or raised structures with a light-coloured surface underneath.

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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.