BYD — China
Premium 390-E Ultra
The BYD Premium 390-E Ultra is a 390W PERC solar panel with 18.8% efficiency. Backed by a 12-year warranty.
Budget TierFEOC: RestrictedBifacial
390W
Wattage
18.8%
Efficiency
PERC
Cell Type
12 years
Warranty
Full Specifications
- Brand
- BYD
- Model
- Premium 390-E Ultra
- Series
- Premium
- Wattage
- 390W
- Module Efficiency
- 18.8%
- Cell Type
- PERC
- Dimensions
- 65-67" x 39-40"
- Weight
- 44 lbs
- Warranty
- 12 years
- Est. Price Per Watt
- $1.61
- Est. 7kW System Cost
- $11,270
- Est. 10kW System Cost
- $16,100
- Temperature Coefficient
- -0.35%/°C
- Bifacial
- Yes
- Origin
- China
- FEOC Status
- fail
Other BYD Panels
| Model | Wattage | Efficiency | Cell | $/W |
|---|---|---|---|---|
| Premium 460W D Plus | 460W | 21% | PERC | $2.38 |
| Standard 460W D Plus | 460W | 21% | PERC | $2.38 |
| Premium Plus 460W D Plus | 460W | 21% | PERC | $2.38 |
| Premium 455W C | 455W | 20.8% | N-Type TOPCon | $2.31 |
| Standard 455W C | 455W | 20.8% | N-Type TOPCon | $2.31 |
Similar Wattage Panels (Competitors)
| Panel | Wattage | Efficiency | $/W |
|---|---|---|---|
| Panasonic EverVolt 420W A Ultra | 420W | 22.3% | $4.08 |
| Panasonic EverVolt 420W D Plus | 420W | 22.3% | $4.08 |
| Panasonic EverVolt VK 420W A Ultra | 420W | 22.3% | $4.08 |
| Panasonic EverVolt VK 420W D Plus | 420W | 22.3% | $4.08 |
Frequently Asked Questions
How much does a 390W BYD Premium 390-E Ultra cost?
The BYD Premium 390-E Ultra costs approximately $628 per panel ($$1.61/W). A typical 7kW system using this panel would cost around $11,270 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 BYD Premium 390-E Ultra a good solar panel?
The BYD Premium 390-E Ultra has 18.8% efficiency and a 12 years warranty, placing it in the budget tier. This is a solid mid-range panel suitable for most residential installations.
How many BYD Premium 390-E Ultra panels do I need?
For a typical 7kW residential system, you'd need approximately 18 panels. For a 10kW system, plan for about 26 panels. The exact number depends on your roof space, energy usage, and local sun hours.