Tesla — US
Tesla T 400W B Black
The Tesla Tesla T 400W B Black is a 400W N-Type TOPCon solar panel with 19.5% efficiency. Made in US. Backed by a 25-year warranty.
Premium Tier🇺🇸 Domestic Content Bonus Eligible
400W
Wattage
19.5%
Efficiency
N-Type TOPCon
Cell Type
25 years
Warranty
Full Specifications
- Brand
- Tesla
- Model
- Tesla T 400W B Black
- Series
- Tesla T
- Wattage
- 400W
- Module Efficiency
- 19.5%
- Cell Type
- N-Type TOPCon
- Dimensions
- 66-80" x 39-41"
- Weight
- 46 lbs
- Warranty
- 25 years
- Est. Price Per Watt
- $2.80
- Est. 7kW System Cost
- $19,600
- Est. 10kW System Cost
- $28,000
- Temperature Coefficient
- -0.25%/°C
- Bifacial
- No
- Origin
- US
- FEOC Status
- pass
Other Tesla Panels
| Model | Wattage | Efficiency | Cell | $/W |
|---|---|---|---|---|
| Tesla Solar 455W E Pro | 455W | 21.6% | N-Type TOPCon | $3.78 |
| Tesla T 455W E Pro | 455W | 21.6% | N-Type TOPCon | $3.78 |
| Tesla H 455W E Pro | 455W | 21.6% | N-Type TOPCon | $3.78 |
| Tesla Solar 450W D Plus | 450W | 21.4% | PERC | $3.69 |
| Tesla T 450W D Plus | 450W | 21.4% | PERC | $3.69 |
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 Tesla Tesla T 400W B Black cost?
The Tesla Tesla T 400W B Black costs approximately $1120 per panel ($$2.80/W). A typical 7kW system using this panel would cost around $19,600 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 Tesla Tesla T 400W B Black a good solar panel?
The Tesla Tesla T 400W B Black has 19.5% efficiency and a 25 years warranty, placing it in the premium tier. This is a solid mid-range panel suitable for most residential installations. It also qualifies for the domestic content bonus under the Inflation Reduction Act.
How many Tesla Tesla T 400W B Black 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.