Silfab Solar — US/Canada
SIL Prime 390W B Black
The Silfab Solar SIL Prime 390W B Black is a 390W PERC solar panel with 19.8% efficiency. Backed by a 25-year warranty.
Premium Tier🇺🇸 Domestic Content Bonus Eligible
390W
Wattage
19.8%
Efficiency
PERC
Cell Type
25 years
Warranty
Full Specifications
- Brand
- Silfab Solar
- Model
- SIL Prime 390W B Black
- Series
- SIL Prime
- Wattage
- 390W
- Module Efficiency
- 19.8%
- Cell Type
- PERC
- Dimensions
- 65-67" x 39-40"
- Weight
- 44 lbs
- Warranty
- 25 years
- Est. Price Per Watt
- $2.69
- Est. 7kW System Cost
- $18,830
- Est. 10kW System Cost
- $26,900
- Temperature Coefficient
- -0.35%/°C
- Bifacial
- No
- Origin
- US/Canada
- FEOC Status
- pass
Other Silfab Solar Panels
| Model | Wattage | Efficiency | Cell | $/W |
|---|---|---|---|---|
| SIL 455W E Pro | 455W | 22% | PERC | $3.35 |
| SIL-N 455W E Pro | 455W | 22% | PERC | $3.35 |
| SIL Prime 455W E Pro | 455W | 22% | PERC | $3.35 |
| SIL 445W D Plus | 445W | 21.7% | N-Type TOPCon | $3.26 |
| SIL-N 445W D Plus | 445W | 21.7% | N-Type TOPCon | $3.26 |
Similar Wattage Panels (Competitors)
| Panel | Wattage | Efficiency | $/W |
|---|---|---|---|
| Panasonic EverVolt 420W A Ultra | 420W | 22.3% | $4.08 |
| Panasonic EverVolt 420W D Plus | 420W | 22.3% | $4.08 |
| Panasonic EverVolt VK 420W A Ultra | 420W | 22.3% | $4.08 |
| Panasonic EverVolt VK 420W D Plus | 420W | 22.3% | $4.08 |
Frequently Asked Questions
How much does a 390W Silfab Solar SIL Prime 390W B Black cost?
The Silfab Solar SIL Prime 390W B Black costs approximately $1049 per panel ($$2.69/W). A typical 7kW system using this panel would cost around $18,830 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 Silfab Solar SIL Prime 390W B Black a good solar panel?
The Silfab Solar SIL Prime 390W B Black has 19.8% efficiency and a 25 years warranty, placing it in the premium tier. This is a solid mid-range panel suitable for most residential installations. It also qualifies for the domestic content bonus under the Inflation Reduction Act.
How many Silfab Solar SIL Prime 390W B Black panels do I need?
For a typical 7kW residential system, you'd need approximately 18 panels. For a 10kW system, plan for about 26 panels. The exact number depends on your roof space, energy usage, and local sun hours.