Phono Solar — China
Pro 420W E Max
The Phono Solar Pro 420W E Max is a 420W N-Type TOPCon solar panel with 20.2% efficiency. Backed by a 12-year warranty.
Standard TierFEOC: Restricted
420W
Wattage
20.2%
Efficiency
N-Type TOPCon
Cell Type
12 years
Warranty
Full Specifications
- Brand
- Phono Solar
- Model
- Pro 420W E Max
- Series
- Pro
- Wattage
- 420W
- Module Efficiency
- 20.2%
- Cell Type
- N-Type TOPCon
- Dimensions
- 66-80" x 39-41"
- Weight
- 48 lbs
- Warranty
- 12 years
- Est. Price Per Watt
- $2.31
- Est. 7kW System Cost
- $16,170
- Est. 10kW System Cost
- $23,100
- Temperature Coefficient
- -0.25%/°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 |
|---|---|---|---|
| Maxeon Maxeon 3 450W D Plus | 450W | 23.3% | $4.61 |
| Maxeon Maxeon 6 450W D Plus | 450W | 23.3% | $4.61 |
| Maxeon Maxeon 7 450W D Plus | 450W | 23.3% | $4.61 |
| Maxeon Maxeon Air 450W D Plus | 450W | 23.3% | $4.61 |
Frequently Asked Questions
How much does a 420W Phono Solar Pro 420W E Max cost?
The Phono Solar Pro 420W E Max costs approximately $970 per panel ($$2.31/W). A typical 7kW system using this panel would cost around $16,170 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 Pro 420W E Max a good solar panel?
The Phono Solar Pro 420W E Max has 20.2% 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 Pro 420W E Max 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.