Panasonic EverVolt HK 430W Specifications & Review
DISCONTINUED: Panasonic exited solar manufacturing in 2023. The EverVolt HK delivered 430W using HJT technology with Panasonic's renowned build quality and 25-year warranty.
What Makes the Panasonic EverVolt HK 430W Different
The Panasonic EverVolt HK 430W carries Panasonic's legendary electronics brand into solar, leveraging decades of semiconductor manufacturing expertise. The EverVolt series is Panasonic's residential panel platform, delivering 430W at 22.2% efficiency using HJT (Heterojunction) cells with 108 half-cut cells. Panasonic panels are assembled in their partnership facilities with the same quality standards that make Panasonic a trusted name in consumer electronics. The -0.26%/°C temperature coefficient is excellent for hot-climate performance. At 1722×1134mm and 22.5 kg, the EverVolt fits standard residential racking. Panasonic's 25-year product warranty and 25-year performance guarantee provide peace of mind backed by one of Japan's most trusted brands.
Key Specifications
| Brand | Panasonic |
| Model | Panasonic EverVolt HK 430W |
| Power Output | 430W |
| Efficiency | 22.2% |
| Power Density | 20.5 W/sq ft |
| Cell Type | HJT (Heterojunction) |
| Cell Count | 108 cells |
| Dimensions | 1722 x 1134 x 30 mm |
| Weight | 22.5 kg |
| Open Circuit Voltage (Voc) | 44V |
| Max Power Voltage (Vmp) | 37V |
| Short Circuit Current (Isc) | 12.55A |
| Max Power Current (Imp) | 11.62A |
| Temp Coefficient (Pmax) | -0.26%/°C |
| Product Warranty | 25 years |
| Performance Warranty | 25 years |
| First Year Degradation | 0.5% |
| Annual Degradation | 0.35% |
| Country of Manufacture | Japan |
| Certifications | IEC 61215, IEC 61730, UL 1703 |
| Panel Type | Bifacial |
| Snow Load | 5400 Pa (112.8 psf) — Heavy Snow Rated |
| Wind Load | 2400 Pa (50.1 psf) |
Pros & Cons
Pros
- ✓ Japanese engineering quality
- ✓ Excellent HJT temperature coefficient
- ✓ 25-year warranty
- ✓ Strong brand trust
Cons
- ✗ DISCONTINUED - no longer manufactured
- ✗ No new units available
- ✗ No ongoing product support
Best For
No longer available for new installations.
Is the Panasonic EverVolt HK 430W Worth It?
The Panasonic EverVolt HK 430W delivers 430W of power at 22.2% module efficiency, which is above the current industry average of approximately 21%. This higher efficiency means you need fewer panels to reach your target system size, saving roof space and potentially reducing mounting hardware costs.
From a warranty perspective, the EverVolt HK 430W comes with a industry-leading 25-year product warranty and a 25-year performance guarantee. The industry standard for product warranties ranges from 12 to 25 years, so this panel sits at the top of that range, giving you long-term peace of mind. At the end of 25 years, the panel is guaranteed to still produce approximately 91.1% of its rated output, with first-year degradation of 0.5% and just 0.35% per year after that.
Pricing varies by region and installer, but the EverVolt HK 430W's combination of 22.2% efficiency and 25-year warranty should be weighed against per-watt quotes from your installer. Request at least three quotes to ensure you are getting competitive pricing for this tier of panel.
For hot climates, the temperature coefficient of -0.26%/°C is excellent. This is better than the typical range of -0.30% to -0.40%/°C, meaning the EverVolt HK 430W retains more output on scorching summer days, a significant advantage in states like Arizona, Texas, and Florida. Overall, the Panasonic EverVolt HK 430W represents a strong value proposition for most residential installations.
Real-World Performance
In real-world conditions, the Panasonic EverVolt HK 430W delivers consistent energy production shaped by its -0.26%/°C temperature coefficient. On a hot summer day when panel surface temperatures reach 65°C (40°C above STC), the EverVolt HK 430W loses approximately 10.4% of rated output — better than PERC panels that lose 13-14% under the same conditions. Over a full year in a typical US location, expect annual specific yield of 1,500-1,800 kWh per kW installed, depending on location, tilt, and shading. The 0.5% first-year degradation settles into 0.35% annual degradation thereafter; after 25 years the EverVolt HK 430W should still produce approximately 91.1% of its original rating. In bifacial installations on light-colored ground surfaces or trackers, expect 5-15% additional energy beyond the rated front-side output. The 108 half-cut cells provide improved shade tolerance compared to full-cell designs — when one cell is shaded, only one sub-string is affected rather than an entire string, limiting production losses to approximately one-third of the panel rather than one-half.
Who Should Buy the Panasonic EverVolt HK 430W?
System Design Tips
For string inverter systems, the Panasonic EverVolt HK 430W's Voc of 44V allows up to 13 panels per string on a 600V inverter, or 10 panels per string on 480V systems. The Isc of 12.55A is within the input range of all major residential string inverters and microinverters. For microinverter pairing, the Enphase IQ8A (366VA) or IQ8H (384VA) handles the 430W output well with a DC/AC ratio of 1.2-1.1. SolarEdge P505 optimizers pair well for optimizer-based systems. Size your inverter at 75-90% of total DC wattage for optimal clipping management — for a 24-panel array (10.3 kW DC), a 8 W AC inverter is a good match. The panel handles 5400 Pa snow load and 2400 Pa wind load.
Price Estimate
The Panasonic EverVolt HK 430W is sold through residential solar distributors and installers. Panasonic pricing varies by distributor and order volume. For a 24-panel system (10.3 kW DC), total installed cost including panels, inverter, racking, wiring, permitting, and labor typically runs $2.50-3.50/W, or approximately $30,960-$36,120 before the 30% federal ITC. After ITC: approximately $21,672-$25,284.
How the Panasonic EverVolt HK 430W Compares
| Model | Wattage | Efficiency | W/sq ft | Warranty | Snow Load | Cell Type |
|---|---|---|---|---|---|---|
| Panasonic EverVolt HK 430W (this panel) | 430W | 22.2% | 20.5 | 25 yrs | 5400 Pa | HJT (Heterojunction) |
| LONGi Hi-MO 6 Explorer 430W | 430W | 21.6% | 20.5 | 12 yrs | 5400 Pa | PERC Mono |
| Trina Solar DE09R 430W | 430W | 21% | 20.5 | 12 yrs | 5400 Pa | PERC Mono |
| REC Alpha Pure R 430W | 430W | 22.3% | 20.5 | 25 yrs | 5400 Pa | HJT (Heterojunction) |
Compare This Panel
Installation & Compatibility
System Voltage & String Sizing
- Open Circuit Voltage (Voc)
- 44V
- Max Power Voltage (Vmp)
- 37V
- Short Circuit Current (Isc)
- 12.55A
- Max Power Current (Imp)
- 11.62A
- Max Panels per String (600V)
- 13 panels
Based on NEC 600V residential limit. Actual string sizing should account for cold-temperature Voc rise. Consult your installer or use a string sizing tool for your specific location.
Mounting Requirements
- Dimensions
- 1722 x 1134 x 30 mm
- Weight
- 22.5 kg (49.6 lbs)
- Area per Panel
- 21.0 sq ft
- Weight per sq ft
- 2.4 lbs/sq ft
Recommended Inverter Types
- - Microinverters: Ideal for shaded roofs or complex layouts. Match to panels rated 430W+.
- - String Inverters: Cost-effective for unshaded arrays. Ensure MPPT range covers 37V.
- - Hybrid Inverters: Best if adding battery storage. Check DC input specs match panel Voc of 44V.
Frequently Asked Questions
How efficient is the Panasonic EverVolt HK 430W compared to other panels?
The EverVolt HK 430W achieves 22.2% module efficiency, which is above average for N-type residential panels. N-type TOPCon panels in our database range from 21.5% to 23.0%, placing the EverVolt HK 430W in the upper half of that range. Higher efficiency means more watts per square foot of roof space.
What is the warranty on the Panasonic EverVolt HK 430W?
Panasonic provides a 25-year product warranty covering manufacturing defects and a 25-year performance warranty guaranteeing output levels. The performance warranty typically starts at 99.5% after year 1 and degrades by 0.35% per year, guaranteeing approximately 91.1% output at year 25. The extended product warranty coverage exceeds the industry standard of 10-12 years.
How many Panasonic EverVolt HK 430W panels do I need for my home?
For a typical US home using 10,000 kWh per year, you need approximately 24 panels (10.3 kW system) assuming 4-5 peak sun hours per day. This varies significantly by location — homes in Arizona may need 21-23 panels while homes in the Pacific Northwest may need 26-28 panels. Your installer will calculate the exact number based on your utility bills, roof orientation, shading, and local solar resource.
What is the efficiency of the Panasonic EverVolt HK 430W?
The Panasonic EverVolt HK 430W achieves 22.2% module efficiency using HJT (Heterojunction) cell technology. This is above the industry average for residential solar panels in 2026.
What warranty does the Panasonic EverVolt HK 430W include?
It comes with a 25-year product warranty and a 25-year performance warranty guaranteeing output at approximately 91.1% of rated power at the end of the warranty period.
How does the Panasonic EverVolt HK 430W perform in hot weather?
With a temperature coefficient of -0.26%/°C, the EverVolt HK 430W handles heat well with minimal power loss. Every degree above 25°C reduces output by 0.26%.
What size system can I build with the Panasonic EverVolt HK 430W?
At 430W per panel, you would need approximately 19 panels for an 8 kW system or 24 panels for a 10 kW system. Each panel measures 1722 x 1134 mm (21.0 sq ft).
What inverter is best with the Panasonic EverVolt HK 430W?
The Panasonic EverVolt HK 430W works well with both string inverters and microinverters. For string inverters, choose one with a maximum input voltage above 44V and an MPPT voltage range that covers 37V. Microinverters rated for 430W+ panels are also an excellent choice, offering panel-level monitoring and shade tolerance. Popular options include Enphase IQ8 series microinverters and SolarEdge string inverters with power optimizers.
How long will the Panasonic EverVolt HK 430W last?
The Panasonic EverVolt HK 430W is built to last well beyond its 25-year performance warranty. With first-year degradation of 0.5% and annual degradation of 0.35% thereafter, the panel will still produce approximately 91.1% of its rated power after 25 years. Most modern solar panels continue generating useful power for 30-40 years, though output gradually decreases over time.
Is the Panasonic EverVolt HK 430W good for Arizona and other sunny states?
Yes, the Panasonic EverVolt HK 430W is an excellent choice for hot, sunny states like Arizona, Nevada, and Texas. Its temperature coefficient of -0.26%/°C is better than the industry average of -0.35%/°C, meaning it retains more power output on hot days. Higher sun exposure in these states means more total energy production throughout the year, often offsetting any heat-related losses.
Is the Panasonic EverVolt HK 430W worth the money?
The Panasonic EverVolt HK 430W delivers 22.2% efficiency, which is above the industry average of ~21%. Combined with a industry-leading 25-year product warranty and 25-year performance guarantee, it offers strong value for homeowners seeking reliable solar generation.
You Might Also Like
Last updated: February 2026