Hyundai Energy — South Korea
HiISS Plus 400-B Silver
The Hyundai Energy HiISS Plus 400-B Silver is a 400W PERC solar panel with 19.7% efficiency. Backed by a 25-year warranty.
Standard Tier
400W
Wattage
19.7%
Efficiency
PERC
Cell Type
25 years
Warranty
Full Specifications
- Brand
- Hyundai Energy
- Model
- HiISS Plus 400-B Silver
- Series
- HiISS Plus
- Wattage
- 400W
- Module Efficiency
- 19.7%
- Cell Type
- PERC
- Dimensions
- 66-80" x 39-41"
- Weight
- 46 lbs
- Warranty
- 25 years
- Est. Price Per Watt
- $2.41
- Est. 7kW System Cost
- $16,870
- Est. 10kW System Cost
- $24,100
- Temperature Coefficient
- -0.35%/°C
- Bifacial
- No
- Origin
- South Korea
- FEOC Status
- check
Other Hyundai Energy Panels
| Model | Wattage | Efficiency | Cell | $/W |
|---|---|---|---|---|
| HiISS 455W D | 455W | 21.7% | PERC | $3.01 |
| HiISS Plus 455W D | 455W | 21.7% | PERC | $3.01 |
| Green 455W D | 455W | 21.7% | PERC | $3.01 |
| HiISS 450W C All-Black | 450W | 21.5% | N-Type TOPCon | $2.95 |
| HiISS Plus 450W C All-Black | 450W | 21.5% | N-Type TOPCon | $2.95 |
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 Hyundai Energy HiISS Plus 400-B Silver cost?
The Hyundai Energy HiISS Plus 400-B Silver costs approximately $964 per panel ($$2.41/W). A typical 7kW system using this panel would cost around $16,870 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 Hyundai Energy HiISS Plus 400-B Silver a good solar panel?
The Hyundai Energy HiISS Plus 400-B Silver has 19.7% efficiency and a 25 years warranty, placing it in the standard tier. This is a solid mid-range panel suitable for most residential installations.
How many Hyundai Energy HiISS Plus 400-B Silver 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.