First Solar — US
Series 5 440W C Plus
The First Solar Series 5 440W C Plus is a 440W CdTe solar panel with 19.3% efficiency. Made in US. Backed by a 25-year warranty.
Premium Tier🇺🇸 Domestic Content Bonus Eligible
440W
Wattage
19.3%
Efficiency
CdTe
Cell Type
25 years
Warranty
Full Specifications
- Brand
- First Solar
- Model
- Series 5 440W C Plus
- Series
- Series 5
- Wattage
- 440W
- Module Efficiency
- 19.3%
- Cell Type
- CdTe
- Dimensions
- 78-82" x 39-41"
- Weight
- 52 lbs
- Warranty
- 25 years
- Est. Price Per Watt
- $3.15
- Est. 7kW System Cost
- $22,050
- Est. 10kW System Cost
- $31,500
- Temperature Coefficient
- -0.25%/°C
- Bifacial
- No
- Origin
- US
- FEOC Status
- pass
Other First Solar Panels
| Model | Wattage | Efficiency | Cell | $/W |
|---|---|---|---|---|
| Series 6 475W E Pro | 475W | 20.5% | CdTe | $3.75 |
| Series 7 475W E Pro | 475W | 20.5% | CdTe | $3.75 |
| Series 4 475W E Pro | 475W | 20.5% | CdTe | $3.75 |
| Series 5 475W E Pro | 475W | 20.5% | CdTe | $3.75 |
| Series 6 465W D Plus | 465W | 20.2% | CdTe | $3.60 |
Similar Wattage Panels (Competitors)
| Panel | Wattage | Efficiency | $/W |
|---|---|---|---|
| Maxeon Maxeon 3 455W E Pro | 455W | 23.5% | $4.72 |
| Maxeon Maxeon 6 455W E Pro | 455W | 23.5% | $4.72 |
| Maxeon Maxeon 7 455W E Pro | 455W | 23.5% | $4.72 |
| Maxeon Maxeon Air 455W E Pro | 455W | 23.5% | $4.72 |
Frequently Asked Questions
How much does a 440W First Solar Series 5 440W C Plus cost?
The First Solar Series 5 440W C Plus costs approximately $1386 per panel ($$3.15/W). A typical 7kW system using this panel would cost around $22,050 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 First Solar Series 5 440W C Plus a good solar panel?
The First Solar Series 5 440W C Plus has 19.3% 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 First Solar Series 5 440W C Plus panels do I need?
For a typical 7kW residential system, you'd need approximately 16 panels. For a 10kW system, plan for about 23 panels. The exact number depends on your roof space, energy usage, and local sun hours.