Seraphim Solar — China
Sephia 405W B Ultra
The Seraphim Solar Sephia 405W B Ultra is a 405W N-Type TOPCon solar panel with 19.6% efficiency. Backed by a 17-year warranty.
Standard TierFEOC: Restricted
405W
Wattage
19.6%
Efficiency
N-Type TOPCon
Cell Type
17 years
Warranty
Full Specifications
- Brand
- Seraphim Solar
- Model
- Sephia 405W B Ultra
- Series
- Sephia
- Wattage
- 405W
- Module Efficiency
- 19.6%
- Cell Type
- N-Type TOPCon
- Dimensions
- 66-80" x 39-41"
- Weight
- 46 lbs
- Warranty
- 17 years
- Est. Price Per Watt
- $2.13
- Est. 7kW System Cost
- $14,910
- Est. 10kW System Cost
- $21,300
- Temperature Coefficient
- -0.25%/°C
- Bifacial
- No
- Origin
- China
- FEOC Status
- fail
Other Seraphim Solar Panels
| Model | Wattage | Efficiency | Cell | $/W |
|---|---|---|---|---|
| SRP 455W D | 455W | 21.1% | PERC | $2.58 |
| Sephia 455W D | 455W | 21.1% | PERC | $2.58 |
| SRP 450W C All-Black | 450W | 21% | N-Type TOPCon | $2.55 |
| Sephia 450W C All-Black | 450W | 21% | N-Type TOPCon | $2.55 |
| SRP 440W E Pro | 440W | 20.7% | N-Type TOPCon | $2.46 |
Similar Wattage Panels (Competitors)
| Panel | Wattage | Efficiency | $/W |
|---|---|---|---|
| SunPower Maxeon 435W A Ultra | 435W | 22.7% | $4.42 |
| SunPower Performance 435W A Ultra | 435W | 22.7% | $4.42 |
| SunPower X-Series 435W A Ultra | 435W | 22.7% | $4.42 |
| SunPower E-Series 435W A Ultra | 435W | 22.7% | $4.42 |
Frequently Asked Questions
How much does a 405W Seraphim Solar Sephia 405W B Ultra cost?
The Seraphim Solar Sephia 405W B Ultra costs approximately $863 per panel ($$2.13/W). A typical 7kW system using this panel would cost around $14,910 before incentives.
⚠ The 30% Federal Solar Tax Credit (48E/ITC) expired July 4, 2026.
Selecting 30% ITC assumes you began construction before this deadline. Most new purchases no longer qualify.Learn about your options after the deadline →
Is the Seraphim Solar Sephia 405W B Ultra a good solar panel?
The Seraphim Solar Sephia 405W B Ultra has 19.6% efficiency and a 17 years warranty, placing it in the standard tier. This is a solid mid-range panel suitable for most residential installations.
How many Seraphim Solar Sephia 405W B Ultra panels do I need?
For a typical 7kW residential system, you'd need approximately 18 panels. For a 10kW system, plan for about 25 panels. The exact number depends on your roof space, energy usage, and local sun hours.