Phono Solar — China
Plus 400W B
The Phono Solar Plus 400W B is a 400W PERC solar panel with 19.5% efficiency. Backed by a 12-year warranty.
Standard TierFEOC: Restricted
400W
Wattage
19.5%
Efficiency
PERC
Cell Type
12 years
Warranty
Full Specifications
- Brand
- Phono Solar
- Model
- Plus 400W B
- Series
- Plus
- Wattage
- 400W
- Module Efficiency
- 19.5%
- Cell Type
- PERC
- Dimensions
- 66-80" x 39-41"
- Weight
- 46 lbs
- Warranty
- 12 years
- Est. Price Per Watt
- $2.10
- Est. 7kW System Cost
- $14,700
- Est. 10kW System Cost
- $21,000
- Temperature Coefficient
- -0.35%/°C
- Bifacial
- No
- Origin
- China
- FEOC Status
- fail
Other Phono Solar Panels
| Model | Wattage | Efficiency | Cell | $/W |
|---|---|---|---|---|
| TwinPlus 450W D | 450W | 21.2% | PERC | $2.61 |
| Plus 450W D | 450W | 21.2% | PERC | $2.61 |
| Pro 450W D | 450W | 21.2% | PERC | $2.61 |
| TwinPlus 445W C All-Black | 445W | 21% | N-Type TOPCon | $2.55 |
| Plus 445W C All-Black | 445W | 21% | N-Type TOPCon | $2.55 |
Similar Wattage Panels (Competitors)
| Panel | Wattage | Efficiency | $/W |
|---|---|---|---|
| SunPower Maxeon 430W E Max | 430W | 22.6% | $4.38 |
| SunPower Maxeon 430W B All-Black | 430W | 22.6% | $4.38 |
| SunPower Maxeon 430W C Black | 430W | 22.6% | $4.38 |
| SunPower Performance 430W E Max | 430W | 22.6% | $4.38 |
Frequently Asked Questions
How much does a 400W Phono Solar Plus 400W B cost?
The Phono Solar Plus 400W B costs approximately $840 per panel ($$2.10/W). A typical 7kW system using this panel would cost around $14,700 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 Phono Solar Plus 400W B a good solar panel?
The Phono Solar Plus 400W B has 19.5% efficiency and a 12 years warranty, placing it in the standard tier. This is a solid mid-range panel suitable for most residential installations.
How many Phono Solar Plus 400W B 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.