SunPower — US
X-Series 370W C HD
The SunPower X-Series 370W C HD is a 370W IBC solar panel with 20.5% efficiency. Made in US. Backed by a 25-year warranty.
Premium Tier🇺🇸 Domestic Content Bonus Eligible
370W
Wattage
20.5%
Efficiency
IBC
Cell Type
25 years
Warranty
Full Specifications
- Brand
- SunPower
- Model
- X-Series 370W C HD
- Series
- X-Series
- Wattage
- 370W
- Module Efficiency
- 20.5%
- Cell Type
- IBC
- Dimensions
- 65-67" x 39-40"
- Weight
- 42 lbs
- Warranty
- 25 years
- Est. Price Per Watt
- $3.50
- Est. 7kW System Cost
- $24,500
- Est. 10kW System Cost
- $35,000
- Temperature Coefficient
- -0.25%/°C
- Bifacial
- No
- Origin
- US
- FEOC Status
- pass
Other SunPower Panels
| Model | Wattage | Efficiency | Cell | $/W |
|---|---|---|---|---|
| Maxeon 455W E Pro | 455W | 23.4% | IBC | $4.71 |
| Performance 455W E Pro | 455W | 23.4% | IBC | $4.71 |
| X-Series 455W E Pro | 455W | 23.4% | IBC | $4.71 |
| E-Series 455W E Pro | 455W | 23.4% | IBC | $4.71 |
| P-Series 455W E Pro | 455W | 23.4% | IBC | $4.71 |
Similar Wattage Panels (Competitors)
| Panel | Wattage | Efficiency | $/W |
|---|---|---|---|
| Maxeon Maxeon 3 400-A Black | 400W | 21.4% | $3.61 |
| Maxeon Maxeon 6 400-A Black | 400W | 21.4% | $3.61 |
| Maxeon Maxeon 7 400-A Black | 400W | 21.4% | $3.61 |
| Maxeon Maxeon Air 400-A Black | 400W | 21.4% | $3.61 |
Frequently Asked Questions
How much does a 370W SunPower X-Series 370W C HD cost?
The SunPower X-Series 370W C HD costs approximately $1295 per panel ($$3.50/W). A typical 7kW system using this panel would cost around $24,500 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 SunPower X-Series 370W C HD a good solar panel?
The SunPower X-Series 370W C HD has 20.5% 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 SunPower X-Series 370W C HD panels do I need?
For a typical 7kW residential system, you'd need approximately 19 panels. For a 10kW system, plan for about 28 panels. The exact number depends on your roof space, energy usage, and local sun hours.