Solar4America — US
S4A 425W A Ultra
The Solar4America S4A 425W A Ultra is a 425W PERC solar panel with 20.8% efficiency. Made in US. Backed by a 25-year warranty.
Standard Tier🇺🇸 Domestic Content Bonus Eligible
425W
Wattage
20.8%
Efficiency
PERC
Cell Type
25 years
Warranty
Full Specifications
- Brand
- Solar4America
- Model
- S4A 425W A Ultra
- Series
- S4A
- Wattage
- 425W
- Module Efficiency
- 20.8%
- Cell Type
- PERC
- Dimensions
- 66-80" x 39-41"
- Weight
- 48 lbs
- Warranty
- 25 years
- Est. Price Per Watt
- $2.75
- Est. 7kW System Cost
- $19,250
- Est. 10kW System Cost
- $27,500
- Temperature Coefficient
- -0.35%/°C
- Bifacial
- No
- Origin
- US
- FEOC Status
- pass
Other Solar4America Panels
| Model | Wattage | Efficiency | Cell | $/W |
|---|---|---|---|---|
| S4A 450W D | 450W | 21.7% | PERC | $2.97 |
| S4A Pro 450W D | 450W | 21.7% | PERC | $2.97 |
| S4A Max 450W D | 450W | 21.7% | PERC | $2.97 |
| S4A 445W C All-Black | 445W | 21.5% | N-Type TOPCon | $2.92 |
| S4A Pro 445W C All-Black | 445W | 21.5% | N-Type TOPCon | $2.92 |
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 425W Solar4America S4A 425W A Ultra cost?
The Solar4America S4A 425W A Ultra costs approximately $1169 per panel ($$2.75/W). A typical 7kW system using this panel would cost around $19,250 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 Solar4America S4A 425W A Ultra a good solar panel?
The Solar4America S4A 425W A Ultra has 20.8% efficiency and a 25 years warranty, placing it in the standard 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 Solar4America S4A 425W A Ultra panels do I need?
For a typical 7kW residential system, you'd need approximately 17 panels. For a 10kW system, plan for about 24 panels. The exact number depends on your roof space, energy usage, and local sun hours.