Waaree Solar — India
WS 400W B Ultra
The Waaree Solar WS 400W B Ultra is a 400W N-Type TOPCon solar panel with 19.2% efficiency. Backed by a 17-year warranty.
Standard Tier
400W
Wattage
19.2%
Efficiency
N-Type TOPCon
Cell Type
17 years
Warranty
Full Specifications
- Brand
- Waaree Solar
- Model
- WS 400W B Ultra
- Series
- WS
- Wattage
- 400W
- Module Efficiency
- 19.2%
- Cell Type
- N-Type TOPCon
- Dimensions
- 66-80" x 39-41"
- Weight
- 46 lbs
- Warranty
- 17 years
- Est. Price Per Watt
- $1.88
- Est. 7kW System Cost
- $13,160
- Est. 10kW System Cost
- $18,800
- Temperature Coefficient
- -0.25%/°C
- Bifacial
- No
- Origin
- India
- FEOC Status
- check
Other Waaree Solar Panels
| Model | Wattage | Efficiency | Cell | $/W |
|---|---|---|---|---|
| WS 450W D | 450W | 20.5% | PERC | $2.40 |
| WS 445W C All-Black | 445W | 20.4% | N-Type TOPCon | $2.36 |
| WS 440W E Pro | 440W | 20.2% | N-Type TOPCon | $2.28 |
| WS 435W B BF | 435W | 20.1% | PERC | $2.24 |
| WS 430W D Plus | 430W | 20% | PERC | $2.20 |
Similar Wattage Panels (Competitors)
| Panel | Wattage | Efficiency | $/W |
|---|---|---|---|
| SunPower Maxeon 430W E Max | 430W | 22.6% | $4.38 |
| SunPower Maxeon 430W B All-Black | 430W | 22.6% | $4.38 |
| SunPower Maxeon 430W C Black | 430W | 22.6% | $4.38 |
| SunPower Performance 430W E Max | 430W | 22.6% | $4.38 |
Frequently Asked Questions
How much does a 400W Waaree Solar WS 400W B Ultra cost?
The Waaree Solar WS 400W B Ultra costs approximately $752 per panel ($$1.88/W). A typical 7kW system using this panel would cost around $13,160 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 Waaree Solar WS 400W B Ultra a good solar panel?
The Waaree Solar WS 400W B Ultra has 19.2% efficiency and a 17 years warranty, placing it in the standard tier. This is a solid mid-range panel suitable for most residential installations.
How many Waaree Solar WS 400W B Ultra 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.