Qcells — South Korea
Q.TRON 400W B Plus
The Hanwha Q CELLS Q.TRON 400W B Plus is a 400W N-Type TOPCon solar panel with 20.1% efficiency. Backed by a 25-year warranty.
Premium TierBifacial
400W
Wattage
20.1%
Efficiency
N-Type TOPCon
Cell Type
25 years
Warranty
Full Specifications
- Brand
- Qcells
- Model
- Q.TRON 400W B Plus
- Series
- Q.TRON
- Wattage
- 400W
- Module Efficiency
- 20.1%
- Cell Type
- N-Type TOPCon
- Dimensions
- 66-80" x 39-41"
- Weight
- 46 lbs
- Warranty
- 25 years
- Est. Price Per Watt
- $2.71
- Est. 7kW System Cost
- $18,970
- Est. 10kW System Cost
- $27,100
- Temperature Coefficient
- -0.25%/°C
- Bifacial
- Yes
- Origin
- South Korea
- FEOC Status
- check
Other Qcells Panels
| Model | Wattage | Efficiency | Cell | $/W |
|---|---|---|---|---|
| Q.MAX 475W E Pro | 475W | 22.7% | PERC | $3.36 |
| Q.MAX 465W D Plus | 465W | 22.3% | N-Type TOPCon | $3.25 |
| Q.MAX 460W C | 460W | 22.1% | PERC | $3.20 |
| Q.TRON 465W E Pro | 465W | 21.9% | PERC | $3.34 |
| Q.MAX 455W A Ultra | 455W | 21.9% | N-Type TOPCon | $3.15 |
Similar Wattage Panels (Competitors)
| Panel | Wattage | Efficiency | $/W |
|---|---|---|---|
| SunPower Maxeon 430W E Max | 430W | 22.6% | $4.38 |
| SunPower Maxeon 430W C Black | 430W | 22.6% | $4.38 |
| Panasonic HIT 425W E Pro | 425W | 22.5% | $4.18 |
| Maxeon 3 430W E HC | 430W | 22.5% | $4.19 |
Frequently Asked Questions
How much does a 400W Qcells Q.TRON 400W B Plus cost?
The Qcells Q.TRON 400W B Plus costs approximately $1084 per panel ($$2.71/W). A typical 7kW system using this panel would cost around $18,970 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 Qcells Q.TRON 400W B Plus a good solar panel?
The Qcells Q.TRON 400W B Plus has 20.1% efficiency and a 25 years warranty, placing it in the premium tier. This is a solid mid-range panel suitable for most residential installations.
How many Qcells Q.TRON 400W 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.