Segment Solar — US
SG 425W B BF
The Segment Solar SG 425W B BF is a 425W PERC solar panel with 20.7% efficiency. Made in US. Backed by a 30-year warranty.
Standard Tier🇺🇸 Domestic Content Bonus EligibleBifacial
425W
Wattage
20.7%
Efficiency
PERC
Cell Type
30 years
Warranty
Full Specifications
- Brand
- Segment Solar
- Model
- SG 425W B BF
- Series
- SG
- Wattage
- 425W
- Module Efficiency
- 20.7%
- Cell Type
- PERC
- Dimensions
- 66-80" x 39-41"
- Weight
- 48 lbs
- Warranty
- 30 years
- Est. Price Per Watt
- $2.75
- Est. 7kW System Cost
- $19,250
- Est. 10kW System Cost
- $27,500
- Temperature Coefficient
- -0.35%/°C
- Bifacial
- Yes
- Origin
- US
- FEOC Status
- pass
Other Segment Solar Panels
| Model | Wattage | Efficiency | Cell | $/W |
|---|---|---|---|---|
| SG 440W D | 440W | 21.2% | PERC | $2.88 |
| SG 435W C All-Black | 435W | 21% | N-Type TOPCon | $2.83 |
| SG 430W E Pro | 430W | 20.8% | N-Type TOPCon | $2.78 |
| SG 420W A HC | 420W | 20.5% | N-Type TOPCon | $2.70 |
| SG 420W D Plus | 420W | 20.5% | PERC | $2.70 |
Similar Wattage Panels (Competitors)
| Panel | Wattage | Efficiency | $/W |
|---|---|---|---|
| Maxeon 3 455W E Pro | 455W | 23.5% | $4.72 |
| SunPower Maxeon 455W E Pro | 455W | 23.4% | $4.71 |
| Maxeon 3 450W D Plus | 450W | 23.3% | $4.61 |
| SunPower Maxeon 445W D Plus | 445W | 23.1% | $4.58 |
Frequently Asked Questions
How much does a 425W Segment Solar SG 425W B BF cost?
The Segment Solar SG 425W B BF costs approximately $1169 per panel ($$2.75/W). A typical 7kW system using this panel would cost around $19,250 before incentives.
⚠ The 30% federal solar tax credit has ended — Section 25D expired December 31, 2025, and the Section 48E construction-start deadline passed 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 Segment Solar SG 425W B BF a good solar panel?
The Segment Solar SG 425W B BF has 20.7% efficiency and a 30 years warranty, placing it in the standard 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 Segment Solar SG 425W B BF panels do I need?
For a typical 7kW residential system, you'd need approximately 17 panels. For a 10kW system, plan for about 24 panels. The exact number depends on your roof space, energy usage, and local sun hours.