Solar4America — US
S4A 375-E Ultra
The Solar4America S4A 375-E Ultra is a 375W PERC solar panel with 19.2% efficiency. Made in US. Backed by a 25-year warranty.
Standard Tier🇺🇸 Domestic Content Bonus EligibleBifacial
375W
Wattage
19.2%
Efficiency
PERC
Cell Type
25 years
Warranty
Full Specifications
- Brand
- Solar4America
- Model
- S4A 375-E Ultra
- Series
- S4A
- Wattage
- 375W
- Module Efficiency
- 19.2%
- Cell Type
- PERC
- Dimensions
- 65-67" x 39-40"
- Weight
- 42 lbs
- Warranty
- 25 years
- Est. Price Per Watt
- $2.35
- Est. 7kW System Cost
- $16,450
- Est. 10kW System Cost
- $23,500
- Temperature Coefficient
- -0.35%/°C
- Bifacial
- Yes
- Origin
- US
- FEOC Status
- pass
Other Solar4America Panels
| Model | Wattage | Efficiency | Cell | $/W |
|---|---|---|---|---|
| S4A 450W D | 450W | 21.7% | PERC | $2.97 |
| S4A 445W C All-Black | 445W | 21.5% | N-Type TOPCon | $2.92 |
| S4A 440W E Pro | 440W | 21.3% | N-Type TOPCon | $2.88 |
| S4A 435W B BF | 435W | 21.2% | PERC | $2.85 |
| S4A 430W A HC | 430W | 21% | N-Type TOPCon | $2.80 |
Similar Wattage Panels (Competitors)
| Panel | Wattage | Efficiency | $/W |
|---|---|---|---|
| SunPower Maxeon-40 HC | 405W | 21.7% | $4.00 |
| SunPower Maxeon 405W A Max | 405W | 21.7% | $4.00 |
| Maxeon 3 405W E BF | 405W | 21.6% | $3.72 |
| SunPower Maxeon-40 HD | 400W | 21.5% | $3.92 |
Frequently Asked Questions
How much does a 375W Solar4America S4A 375-E Ultra cost?
The Solar4America S4A 375-E Ultra costs approximately $881 per panel ($$2.35/W). A typical 7kW system using this panel would cost around $16,450 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 Solar4America S4A 375-E Ultra a good solar panel?
The Solar4America S4A 375-E Ultra has 19.2% 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 375-E Ultra panels do I need?
For a typical 7kW residential system, you'd need approximately 19 panels. For a 10kW system, plan for about 27 panels. The exact number depends on your roof space, energy usage, and local sun hours.