Hyundai Energy — South Korea
HiISS 405W B Ultra
The Hyundai Energy HiISS 405W B Ultra is a 405W N-Type TOPCon solar panel with 19.9% efficiency. Backed by a 30-year warranty.
Standard Tier
405W
Wattage
19.9%
Efficiency
N-Type TOPCon
Cell Type
30 years
Warranty
Full Specifications
- Brand
- Hyundai Energy
- Model
- HiISS 405W B Ultra
- Series
- HiISS
- Wattage
- 405W
- Module Efficiency
- 19.9%
- Cell Type
- N-Type TOPCon
- Dimensions
- 66-80" x 39-41"
- Weight
- 46 lbs
- Warranty
- 30 years
- Est. Price Per Watt
- $2.47
- Est. 7kW System Cost
- $17,290
- Est. 10kW System Cost
- $24,700
- Temperature Coefficient
- -0.25%/°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 450W C All-Black | 450W | 21.5% | N-Type TOPCon | $2.95 |
| HiISS 445W E Pro | 445W | 21.4% | N-Type TOPCon | $2.92 |
| HiISS 440W B BF | 440W | 21.2% | PERC | $2.86 |
| HiISS 435W A HC | 435W | 21% | N-Type TOPCon | $2.80 |
Similar Wattage Panels (Competitors)
| Panel | Wattage | Efficiency | $/W |
|---|---|---|---|
| SunPower Maxeon 435W A Ultra | 435W | 22.7% | $4.42 |
| Maxeon 3 435W E Max | 435W | 22.7% | $4.29 |
| SunPower Maxeon 430W E Max | 430W | 22.6% | $4.38 |
| SunPower Maxeon 430W C Black | 430W | 22.6% | $4.38 |
Frequently Asked Questions
How much does a 405W Hyundai Energy HiISS 405W B Ultra cost?
The Hyundai Energy HiISS 405W B Ultra costs approximately $1000 per panel ($$2.47/W). A typical 7kW system using this panel would cost around $17,290 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 Hyundai Energy HiISS 405W B Ultra a good solar panel?
The Hyundai Energy HiISS 405W B Ultra has 19.9% efficiency and a 30 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 405W B Ultra 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.