Silfab Solar — US/Canada
SIL 440W C
The Silfab Solar SIL 440W C is a 440W PERC solar panel with 21.5% efficiency. Backed by a 30-year warranty.
Premium Tier🇺🇸 Domestic Content Bonus Eligible
440W
Wattage
21.5%
Efficiency
PERC
Cell Type
30 years
Warranty
Full Specifications
- Brand
- Silfab Solar
- Model
- SIL 440W C
- Series
- SIL
- Wattage
- 440W
- Module Efficiency
- 21.5%
- Cell Type
- PERC
- Dimensions
- 78-82" x 39-41"
- Weight
- 52 lbs
- Warranty
- 30 years
- Est. Price Per Watt
- $3.20
- Est. 7kW System Cost
- $22,400
- Est. 10kW System Cost
- $32,000
- 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 |
|---|---|---|---|
| Maxeon Maxeon 3 455W E Pro | 455W | 23.5% | $4.72 |
| Maxeon Maxeon 6 455W E Pro | 455W | 23.5% | $4.72 |
| Maxeon Maxeon 7 455W E Pro | 455W | 23.5% | $4.72 |
| Maxeon Maxeon Air 455W E Pro | 455W | 23.5% | $4.72 |
Frequently Asked Questions
How much does a 440W Silfab Solar SIL 440W C cost?
The Silfab Solar SIL 440W C costs approximately $1408 per panel ($$3.20/W). A typical 7kW system using this panel would cost around $22,400 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 440W C a good solar panel?
The Silfab Solar SIL 440W C has 21.5% efficiency and a 30 years warranty, placing it in the premium tier. This is above-average efficiency, making it a strong choice. It also qualifies for the domestic content bonus under the Inflation Reduction Act.
How many Silfab Solar SIL 440W C panels do I need?
For a typical 7kW residential system, you'd need approximately 16 panels. For a 10kW system, plan for about 23 panels. The exact number depends on your roof space, energy usage, and local sun hours.