Canadian Solar — Canada/China
CS 405W B Plus
The Canadian Solar CS 405W B Plus is a 405W N-Type TOPCon solar panel with 19.8% efficiency. Backed by a 25-year warranty.
Standard TierFEOC: RestrictedBifacial
405W
Wattage
19.8%
Efficiency
N-Type TOPCon
Cell Type
25 years
Warranty
Full Specifications
- Brand
- Canadian Solar
- Model
- CS 405W B Plus
- Series
- CS
- Wattage
- 405W
- Module Efficiency
- 19.8%
- Cell Type
- N-Type TOPCon
- Dimensions
- 66-80" x 39-41"
- Weight
- 46 lbs
- Warranty
- 25 years
- Est. Price Per Watt
- $2.21
- Est. 7kW System Cost
- $15,470
- Est. 10kW System Cost
- $22,100
- Temperature Coefficient
- -0.25%/°C
- Bifacial
- Yes
- Origin
- Canada/China
- FEOC Status
- fail
Other Canadian Solar Panels
| Model | Wattage | Efficiency | Cell | $/W |
|---|---|---|---|---|
| CS 490W D | 490W | 22.7% | N-Type TOPCon | $2.99 |
| CS 485W C All-Black | 485W | 22.5% | PERC | $2.93 |
| CS 475W B BF | 475W | 22.2% | N-Type TOPCon | $2.85 |
| CS 470W A HC | 470W | 22% | PERC | $2.80 |
| CS 465W D Plus | 465W | 21.8% | N-Type TOPCon | $2.75 |
Similar Wattage Panels (Competitors)
| Panel | Wattage | Efficiency | $/W |
|---|---|---|---|
| SunPower Maxeon 435W A Ultra | 435W | 22.7% | $4.42 |
| Maxeon 3 435W E Max | 435W | 22.7% | $4.29 |
| SunPower Maxeon 430W E Max | 430W | 22.6% | $4.38 |
| SunPower Maxeon 430W C Black | 430W | 22.6% | $4.38 |
Frequently Asked Questions
How much does a 405W Canadian Solar CS 405W B Plus cost?
The Canadian Solar CS 405W B Plus costs approximately $895 per panel ($$2.21/W). A typical 7kW system using this panel would cost around $15,470 before incentives.
⚠ The 30% federal solar tax credit has ended — Section 25D expired December 31, 2025, and the Section 48E construction-start deadline passed 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 405W B Plus a good solar panel?
The Canadian Solar CS 405W B Plus has 19.8% 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 405W B Plus 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.