Qcells — South Korea/US
Q.PEAK 400W A
The Qcells Q.PEAK 400W A is a 400W PERC solar panel with 19.9% efficiency. Backed by a 25-year warranty.
Premium Tier
400W
Wattage
19.9%
Efficiency
PERC
Cell Type
25 years
Warranty
Full Specifications
- Brand
- Qcells
- Model
- Q.PEAK 400W A
- Series
- Q.PEAK
- Wattage
- 400W
- Module Efficiency
- 19.9%
- Cell Type
- PERC
- Dimensions
- 66-80" x 39-41"
- Weight
- 46 lbs
- Warranty
- 25 years
- Est. Price Per Watt
- $2.61
- Est. 7kW System Cost
- $18,270
- Est. 10kW System Cost
- $26,100
- Temperature Coefficient
- -0.35%/°C
- Bifacial
- No
- Origin
- South Korea/US
- FEOC Status
- check
Other Qcells Panels
| Model | Wattage | Efficiency | Cell | $/W |
|---|---|---|---|---|
| Q.TRON 475W E Pro | 475W | 22.7% | PERC | $3.36 |
| Q.PEAK 475W E Pro | 475W | 22.7% | PERC | $3.36 |
| Q.PLUS 475W E Pro | 475W | 22.7% | PERC | $3.36 |
| Q.PEAK DUO 475W E Pro | 475W | 22.7% | PERC | $3.36 |
| Q.MAX 475W E Pro | 475W | 22.7% | PERC | $3.36 |
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 Qcells Q.PEAK 400W A cost?
The Qcells Q.PEAK 400W A costs approximately $1044 per panel ($$2.61/W). A typical 7kW system using this panel would cost around $18,270 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 Qcells Q.PEAK 400W A a good solar panel?
The Qcells Q.PEAK 400W A has 19.9% 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.PEAK 400W A 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.