Panasonic — Japan
EverVolt VK 420W A Ultra
The Panasonic EverVolt VK 420W A Ultra is a 420W HJT solar panel with 22.3% efficiency. Made in Japan. Backed by a 25-year warranty.
Premium Tier
420W
Wattage
22.3%
Efficiency
HJT
Cell Type
25 years
Warranty
Full Specifications
- Brand
- Panasonic
- Model
- EverVolt VK 420W A Ultra
- Series
- EverVolt VK
- Wattage
- 420W
- Module Efficiency
- 22.3%
- Cell Type
- HJT
- Dimensions
- 66-80" x 39-41"
- Weight
- 48 lbs
- Warranty
- 25 years
- Est. Price Per Watt
- $4.08
- Est. 7kW System Cost
- $28,560
- Est. 10kW System Cost
- $40,800
- Temperature Coefficient
- -0.25%/°C
- Bifacial
- No
- Origin
- Japan
- FEOC Status
- likely_pass
Other Panasonic Panels
| Model | Wattage | Efficiency | Cell | $/W |
|---|---|---|---|---|
| EverVolt 425W E Pro | 425W | 22.5% | HJT | $4.18 |
| EverVolt VK 425W E Pro | 425W | 22.5% | HJT | $4.18 |
| HIT 425W E Pro | 425W | 22.5% | HJT | $4.18 |
| HIT Plus 425W E Pro | 425W | 22.5% | HJT | $4.18 |
| EverVolt 420W A Ultra | 420W | 22.3% | HJT | $4.08 |
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 Panasonic EverVolt VK 420W A Ultra cost?
The Panasonic EverVolt VK 420W A Ultra costs approximately $1714 per panel ($$4.08/W). A typical 7kW system using this panel would cost around $28,560 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 Panasonic EverVolt VK 420W A Ultra a good solar panel?
The Panasonic EverVolt VK 420W A Ultra has 22.3% efficiency and a 25 years warranty, placing it in the premium tier. This is above-average efficiency, making it a strong choice.
How many Panasonic EverVolt VK 420W A Ultra 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.