REC — Singapore
Alpha 405W E BF
The REC Alpha 405W E BF is a 405W HJT solar panel with 20.7% efficiency. Backed by a 25-year warranty.
Premium TierBifacial
405W
Wattage
20.7%
Efficiency
HJT
Cell Type
25 years
Warranty
Full Specifications
- Brand
- REC
- Model
- Alpha 405W E BF
- Series
- Alpha
- Wattage
- 405W
- Module Efficiency
- 20.7%
- Cell Type
- HJT
- Dimensions
- 66-80" x 39-41"
- Weight
- 46 lbs
- Warranty
- 25 years
- Est. Price Per Watt
- $3.04
- Est. 7kW System Cost
- $21,280
- Est. 10kW System Cost
- $30,400
- Temperature Coefficient
- -0.25%/°C
- Bifacial
- Yes
- Origin
- Singapore
- FEOC Status
- likely_pass
Other REC Panels
| Model | Wattage | Efficiency | Cell | $/W |
|---|---|---|---|---|
| Alpha 455W E Pro | 455W | 23% | N-Type TOPCon | $3.84 |
| Alpha 450W D Plus | 450W | 22.8% | HJT | $3.77 |
| Alpha 445W A Ultra | 445W | 22.5% | HJT | $3.67 |
| Alpha 440W C | 440W | 22.3% | N-Type TOPCon | $3.60 |
| Alpha 435W E Max | 435W | 22.1% | N-Type TOPCon | $3.53 |
Similar Wattage Panels (Competitors)
| Panel | Wattage | Efficiency | $/W |
|---|---|---|---|
| SunPower Maxeon 435W A Ultra | 435W | 22.7% | $4.42 |
| Maxeon 3 435W E Max | 435W | 22.7% | $4.29 |
| SunPower Maxeon 430W E Max | 430W | 22.6% | $4.38 |
| SunPower Maxeon 430W C Black | 430W | 22.6% | $4.38 |
Frequently Asked Questions
How much does a 405W REC Alpha 405W E BF cost?
The REC Alpha 405W E BF costs approximately $1231 per panel ($$3.04/W). A typical 7kW system using this panel would cost around $21,280 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 REC Alpha 405W E BF a good solar panel?
The REC Alpha 405W E BF has 20.7% efficiency and a 25 years warranty, placing it in the premium tier. This is a solid mid-range panel suitable for most residential installations.
How many REC Alpha 405W E BF 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.