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Solaria PowerX-400R vs SPV660-TG12-132BD 1 of 16 identical Swap Change panels

Solaria Solaria PowerX-400R vs Solaria SPV660-TG12-132BD

Solaria
Solaria PowerX-400R
400 Wp 20.50 %
Open panel page Datasheet PDF
VS
Solaria
SPV660-TG12-132BD
660 Wp 21.28 % TOPCon Bifacial Incomplete
Open panel page Datasheet PDF
The verdict

SPV660-TG12-132BD leads on the differences that matter

The largest is temperature coefficient: 0.060 %/°C better in heat. 1 of 16 comparable parameters are identical, with 3 more left out because at least one datasheet does not publish them.

See all 15 differences
How alike are they
1 of 16 comparable
parameters are identical
identical differs not published
01

What actually differs

15 of 16 parameters
Parameter Solaria PowerX-400R SPV660-TG12-132BD Difference
Temperature coefficient -0.360 %/°C -0.300 %/°C 0.060 %/°C better in heat
Module efficiency 20.50 % 21.28 % 0.78 pp more efficient
Rated power 400 Wp 660 Wp 260 W more power
Performance warranty 25 yrs 30 yrs 5 yrs longer
Weight 22.1 kg 38.0 kg 15.9 kg lighter
Product warranty 25 yrs 12 yrs 13 yrs longer
Power density 204.7 Wp/m² 212.7 Wp/m² 8.0 Wp/m² higher
Open-circuit voltage 37.30 V 46.10 V 8.80 V apart
Short-circuit current 13.68 A 17.84 A 4.16 A apart
Module area 1.954 m² 3.103 m² 1.149 m² apart
Voltage at max power 31.00 V 38.81 V 7.81 V apart
Current at max power 12.90 A 17.01 A 4.11 A apart
Weight per kWp 55.2 kg/kWp 57.6 kg/kWp 2.3 kg/kWp lighter
Bifacial No Yes No vs Yes
Dimensions 1723x1134x35 mm 2383x1302x30 mm 1723x1134x35 mm vs 2383x1302x30 mm
02

What it means on a roof

Thirty years of production
Declared first-year losses, with 0.40% a year afterwards assumed for both panels, at 1,200 kWh/kWp a year
Solaria PowerX-400R
13,277 kWh
SPV660-TG12-132BD
21,907 kWh
Lifetime gap
8,630 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario Solaria PowerX-400R SPV660-TG12-132BD
Standard test conditions 25 °C 100.0% of rated power 400 W 660 W
Cool, bright day 40 °C 94.6% of rated power 378 W 630 W
Typical summer roof 55 °C 89.2% of rated power 357 W 601 W
Hot roof 70 °C 83.8% of rated power 335 W 571 W
03

Full specification

Parameter Solaria PowerX-400R SPV660-TG12-132BD Difference
Power and efficiency
Rated power 400 Wp 660 Wp +260 W for SPV660-TG12-132BD
Module efficiency 20.50 % 21.28 % +0.78 pp for SPV660-TG12-132BD
Power density 204.7 Wp/m² 212.7 Wp/m² +8.0 Wp/m² for SPV660-TG12-132BD
Open-circuit voltage 37.30 V 46.10 V 8.80 V apart
Voltage at max power 31.00 V 38.81 V 7.81 V apart
Short-circuit current 13.68 A 17.84 A 4.16 A apart
Current at max power 12.90 A 17.01 A 4.11 A apart
Temperature
Temperature coefficient -0.360 %/°C -0.300 %/°C +0.060 %/°C for SPV660-TG12-132BD
Mechanical
Dimensions 1723x1134x35 mm 2383x1302x30 mm 1723x1134x35 mm vs 2383x1302x30 mm
Module area 1.954 m² 3.103 m² 1.149 m² apart
Weight 22.1 kg 38.0 kg -15.9 kg for Solaria PowerX-400R
Weight per kWp 55.2 kg/kWp 57.6 kg/kWp -2.3 kg/kWp for Solaria PowerX-400R
Warranty and degradation
Product warranty 25 yrs 12 yrs +13 yrs for Solaria PowerX-400R
Performance warranty 25 yrs 30 yrs +5 yrs for SPV660-TG12-132BD
Annual degradation 0.50 %/yr - Not published by Solaria
Technology
Cell technology - TOPCon Not published by Solaria
Cell type Monocrystalline Monocrystalline Same
Cell count - 132 Not published by Solaria
Bifacial No Yes No vs Yes
04

Against the whole database

14,005 panels
Efficiency
#11,308 vs #8,795
SPV660-TG12-132BD leads by 2,513 places
Power density
#11,499 vs #8,718
SPV660-TG12-132BD leads by 2,781 places
Heat behaviour
#12,345 vs #6,093
SPV660-TG12-132BD leads by 6,252 places
Weight
#9,691 vs #11,284
Solaria PowerX-400R leads by 1,593 places
Warranty
#9,798 vs #21
SPV660-TG12-132BD leads by 9,777 places
Overall
#10,732 vs #3,149
SPV660-TG12-132BD leads by 7,583 places
05

More useful comparisons

Open the full database
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Solaria SPV660-TG12-132BD vs Solaria SPV680-TG12-132BD
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Solaria SPV660-TG12-132BD vs Solaria SPV675-TG12-132BD
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Solaria SPV660-TG12-132BD vs Solaria SPV670-TG12-132BD
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Solaria SPV660-TG12-132BD vs Solaria SPV665-TG12-132BD
The same specification on paper
06

Written summary

07

Questions about this pairing

Which panel is better: Solaria Solaria PowerX-400R or Solaria SPV660-TG12-132BD?
According to our database: Solaria SPV660-TG12-132BD has higher module efficiency (21.28% vs 20.50%); Solaria SPV660-TG12-132BD tolerates heat better (temp coeff -0.300%/°C vs -0.360%/°C). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Solaria Solaria PowerX-400R and Solaria SPV660-TG12-132BD?
Solaria Solaria PowerX-400R has a module efficiency of 20.50%, while Solaria SPV660-TG12-132BD is 21.28%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Solaria Solaria PowerX-400R use vs Solaria SPV660-TG12-132BD?
Solaria Solaria PowerX-400R uses Monocrystalline cells; Solaria SPV660-TG12-132BD uses TOPCon. 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 PowerX-400R and Solaria SPV660-TG12-132BD?
Solaria Solaria PowerX-400R has a 25 years power warranty; Solaria SPV660-TG12-132BD 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.
Are Solaria Solaria PowerX-400R and Solaria SPV660-TG12-132BD bifacial panels?
Solaria SPV660-TG12-132BD is bifacial (captures light from both faces); Solaria Solaria PowerX-400R 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.