Suniva — US
OPTimus 400W E Max
The Suniva OPTimus 400W E Max is a 400W PERC solar panel with 19.5% efficiency. Made in US. Backed by a 25-year warranty.
Standard Tier🇺🇸 Domestic Content Bonus Eligible
400W
Wattage
19.5%
Efficiency
PERC
Cell Type
25 years
Warranty
Full Specifications
- Brand
- Suniva
- Model
- OPTimus 400W E Max
- Series
- OPTimus
- Wattage
- 400W
- Module Efficiency
- 19.5%
- Cell Type
- PERC
- Dimensions
- 66-80" x 39-41"
- Weight
- 46 lbs
- Warranty
- 25 years
- Est. Price Per Watt
- $2.80
- Est. 7kW System Cost
- $19,600
- Est. 10kW System Cost
- $28,000
- Temperature Coefficient
- -0.35%/°C
- Bifacial
- No
- Origin
- US
- FEOC Status
- pass
Other Suniva Panels
| Model | Wattage | Efficiency | Cell | $/W |
|---|---|---|---|---|
| OPTimus 420W D | 420W | 20.2% | PERC | $3.03 |
| OPTimus 415W C All-Black | 415W | 20.1% | PERC | $3.00 |
| OPTimus 410W E Pro | 410W | 19.9% | PERC | $2.93 |
| OPTimus 410W B BF | 410W | 19.9% | PERC | $2.93 |
| OPTimus 405W A Ultra | 405W | 19.7% | PERC | $2.87 |
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 Suniva OPTimus 400W E Max cost?
The Suniva OPTimus 400W E Max costs approximately $1120 per panel ($$2.80/W). A typical 7kW system using this panel would cost around $19,600 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 Suniva OPTimus 400W E Max a good solar panel?
The Suniva OPTimus 400W E Max has 19.5% 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 Suniva OPTimus 400W E Max 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.