Canadian Solar — Canada/China
CS 390-E Ultra
The Canadian Solar CS 390-E Ultra is a 390W N-Type TOPCon solar panel with 19.3% efficiency. Backed by a 25-year warranty.
Standard TierFEOC: RestrictedBifacial
390W
Wattage
19.3%
Efficiency
N-Type TOPCon
Cell Type
25 years
Warranty
Full Specifications
- Brand
- Canadian Solar
- Model
- CS 390-E Ultra
- Series
- CS
- Wattage
- 390W
- Module Efficiency
- 19.3%
- Cell Type
- N-Type TOPCon
- Dimensions
- 65-67" x 39-40"
- Weight
- 44 lbs
- Warranty
- 25 years
- Est. Price Per Watt
- $2.08
- Est. 7kW System Cost
- $14,560
- Est. 10kW System Cost
- $20,800
- Temperature Coefficient
- -0.25%/°C
- Bifacial
- Yes
- Origin
- Canada/China
- FEOC Status
- fail
Other Canadian Solar Panels
| Model | Wattage | Efficiency | Cell | $/W |
|---|---|---|---|---|
| HiKu 490W D | 490W | 22.7% | N-Type TOPCon | $2.99 |
| BiHiKu 490W D | 490W | 22.7% | N-Type TOPCon | $2.99 |
| CS 490W D | 490W | 22.7% | N-Type TOPCon | $2.99 |
| KuMax 490W D | 490W | 22.7% | N-Type TOPCon | $2.99 |
| SuperPower 490W D | 490W | 22.7% | N-Type TOPCon | $2.99 |
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 Canadian Solar CS 390-E Ultra cost?
The Canadian Solar CS 390-E Ultra costs approximately $811 per panel ($$2.08/W). A typical 7kW system using this panel would cost around $14,560 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 Canadian Solar CS 390-E Ultra a good solar panel?
The Canadian Solar CS 390-E Ultra has 19.3% efficiency and a 25 years warranty, placing it in the standard tier. This is a solid mid-range panel suitable for most residential installations.
How many Canadian Solar CS 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.