Maxeon Maxeon 6 425W vs Panasonic EverVolt HK 430W
The Maxeon Maxeon 6 425W wins this comparison by a decisive margin. It offers better long-term durability with 40-year warranty. For most residential installations, the Maxeon Maxeon 6 425W is the stronger choice.
Key Differences
- • Maxeon Maxeon 6 425W is rated at 425W while Panasonic EverVolt HK 430W is rated at 430W, a 5W difference.
- • Both achieve identical 22.2% module efficiency.
- • Maxeon Maxeon 6 425W comes with a 40-year product warranty vs 25 years for the other.
- • Panasonic EverVolt HK 430W has a superior temperature coefficient of -0.26%/°C vs -0.27%/°C, retaining more power in hot climates.
- • Maxeon Maxeon 6 425W uses IBC (Interdigitated Back Contact) cells while Panasonic EverVolt HK 430W uses HJT (Heterojunction) cells, representing different technology generations.
Specifications Breakdown
Module Efficiency
Both the Maxeon Maxeon 6 425W and Panasonic EverVolt HK 430W share identical 22.2% module efficiency, producing comparable power per unit area. The Maxeon Maxeon 6 425W generates 220.0 W/m² while the Panasonic EverVolt HK 430W generates 220.2 W/m² based on their respective panel dimensions. With matched efficiency, neither panel holds a density advantage for space-constrained rooftop installations, so other factors like warranty coverage and temperature performance become the deciding metrics.
Power Output
The Panasonic EverVolt HK 430W delivers 430W per panel versus 425W for the Maxeon Maxeon 6 425W, a 5W difference per module. To build an 8 kW residential system, you would need 19 Maxeon Maxeon 6 425W panels or 19 Panasonic EverVolt HK 430W panels. Despite the per-panel wattage difference, both require the same number of panels for this system size due to rounding. Higher wattage per panel is particularly valuable for commercial-scale installations where panel count directly impacts balance-of-system costs.
Temperature Coefficient
The Panasonic EverVolt HK 430W has a temperature coefficient of -0.26%/°C versus -0.27%/°C for the Maxeon Maxeon 6 425W. On a hot summer day when cell temperature reaches 65°C (40°C above the 25°C STC baseline), the Panasonic EverVolt HK 430W retains 94.8% of its rated power while the other retains 94.6%. While the numerical gap is modest, it still accumulates over decades of summer production, especially in southern latitudes with prolonged peak heat hours.
Warranty Coverage
The Maxeon Maxeon 6 425W is backed by a 40-year product warranty and 40-year performance guarantee, while the Panasonic EverVolt HK 430W offers 25-year product and 25-year performance coverage. The Maxeon Maxeon 6 425W provides 15 additional years of defect protection, covering manufacturing issues, material failures, and premature performance loss. Based on their published degradation rates (0.25% first year then 0.25%/year for Maxeon Maxeon 6 425W; 0.5% first year then 0.35%/year for Panasonic EverVolt HK 430W), after 25 years the Maxeon Maxeon 6 425W should retain approximately 93.8% of original output versus 91.1% for the Panasonic EverVolt HK 430W. This 2.7 percentage point gap in end-of-life output meaningfully impacts lifetime energy economics.
Physical Dimensions & Weight
The Maxeon Maxeon 6 425W measures 1872×1032×30mm and weighs 20.5 kg, while the Panasonic EverVolt HK 430W measures 1722×1134×30mm at 22.5 kg. 1.93 m² of panel area for the Maxeon Maxeon 6 425W versus 1.95 m² for the Panasonic EverVolt HK 430W. The Maxeon Maxeon 6 425W is 2.0 kg lighter per panel, which reduces structural load requirements on the roof and makes handling easier during installation. For a 20-panel system, that is a total weight difference of 40 kg. Similar footprints mean both panels fit comparably on standard residential rooftop configurations.
Specification Comparison
| Specification | Maxeon Maxeon 6 425W | Panasonic EverVolt HK 430W |
|---|---|---|
| Power | 425W | 430W |
| Efficiency | 22.2% | 22.2% |
| Power Density | 20.4 W/sq ft | 20.5 W/sq ft |
| Cell Type | IBC (Interdigitated Back Contact) | HJT (Heterojunction) |
| Bifacial | Yes | Yes |
| Weight | 20.5 kg | 22.5 kg |
| Temp Coefficient | -0.27%/°C | -0.26%/°C |
| Snow Load | 5400 Pa | 5400 Pa |
| Wind Load | 3600 Pa | 2400 Pa |
| Product Warranty | 40 years | 25 years |
| Performance Warranty | 40 years | 25 years |
| Degradation (Year 1) | 0.25% | 0.5% |
| Annual Degradation | 0.25% | 0.35% |
| Country | Malaysia | Japan |
5-Dimension Head-to-Head Analysis
1. Efficiency & Power Density
Winner: TieBoth panels achieve 22.2% module efficiency, producing identical power per square meter. Neither has an advantage in space-constrained installations.
2. Hot Climate Performance
Winner: Panasonic EverVolt HK 430WThe Panasonic EverVolt HK 430W has a better temperature coefficient of -0.26%/°C versus -0.27%/°C. On a 45°C summer day (20°C above STC), the winner retains 94.8% of rated power versus 94.6%. The difference is modest but accumulates over 25 years of summer production.
3. Durability & Warranty
Winner: Maxeon Maxeon 6 425WMaxeon Maxeon 6 425W leads with a 40-year product warranty versus 25 years. Maxeon Maxeon 6 425W degrades more slowly at 0.25% per year versus 0.35%. After 25 years, expect 93.8% vs 91.1% of original output for Maxeon Maxeon 6 425W and Panasonic EverVolt HK 430W respectively.
4. Power Output
Winner: Panasonic EverVolt HK 430WThe Panasonic EverVolt HK 430W delivers 430W versus 425W per panel — 5W more. For an 8 kW system, you need 19 panels with the higher-wattage option versus 19 panels, saving 0 panels and the associated racking and labor costs.
5. Cell Technology
Winner: TieThe Maxeon Maxeon 6 425W uses IBC (Interdigitated Back Contact): IBC (Interdigitated Back Contact) moves all electrical contacts to the rear of the cell, maximizing front-side light capture for the highest possible efficiency. The Panasonic EverVolt HK 430W uses HJT (Heterojunction): HJT (Heterojunction) combines crystalline silicon with amorphous silicon layers, delivering the best temperature coefficient and bifacial gains, but at higher manufacturing cost. Both are equivalent-generation technologies.
Maxeon Maxeon 6 425W
The Maxeon 6 delivers 425W with 22.2% efficiency and the same industry-leading 40-year warranty as the Maxeon 7 series.
Pros
- + 40-year complete warranty
- + 22.2% IBC efficiency
- + Excellent aesthetics
- + Ultra-low degradation
Cons
- - Very high cost per watt
- - Limited installer network
- - Fewer wattage options
Panasonic EverVolt HK 430W
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.
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
Choose Maxeon Maxeon 6 425W If...
- ✓ Long-term warranty protection is a top priority and you plan to stay in your home for 40+ years
- ✓ You want maximum output retention over the system's 25-30 year lifespan
- ✓ Homeowners seeking a premium panel with the longest warranty available.
Choose Panasonic EverVolt HK 430W If...
- ✓ You want fewer panels to reach your target system size, reducing racking and labor costs
- ✓ You live in a hot climate (Arizona, Texas, Florida) where heat performance matters
- ✓ You prefer newer cell technology with a longer performance improvement runway
- ✓ No longer available for new installations.
Our Recommendation
The Maxeon Maxeon 6 425W is the decisive winner in this solar panel comparison, outperforming the Panasonic EverVolt HK 430W in 1 of 5 dimensions. Unless you have a specific requirement that the Panasonic EverVolt HK 430W uniquely addresses, the Maxeon Maxeon 6 425W is the stronger choice for virtually every installation scenario.
Frequently Asked Questions
Which is better, Maxeon Maxeon 6 425W or Panasonic EverVolt HK 430W?
The Maxeon Maxeon 6 425W wins this comparison by a decisive margin. It offers better long-term durability with 40-year warranty. For most residential installations, the Maxeon Maxeon 6 425W is the stronger choice.
Which panel is more efficient, Maxeon Maxeon 6 425W or Panasonic EverVolt HK 430W?
The both panels share 22.2% module efficiency. Higher efficiency means more watts per square foot of roof space, which is critical for space-constrained installations. The difference of 0.0 percentage points translates to approximately 5W per panel under standard test conditions.
Which has a better warranty, Maxeon Maxeon 6 425W or Panasonic EverVolt HK 430W?
The Maxeon Maxeon 6 425W comes with a 40-year product warranty and 40-year performance guarantee. The Panasonic EverVolt HK 430W offers 25-year product and 25-year performance warranties. Maxeon Maxeon 6 425W provides 15 additional years of product coverage.
Which panel performs better in hot weather?
The Maxeon Maxeon 6 425W has a temperature coefficient of -0.27%/°C and the Panasonic EverVolt HK 430W is -0.26%/°C. Panasonic EverVolt HK 430W retains more power in heat — important in states like Arizona, Texas, and Florida. A lower (less negative) temperature coefficient is better.
How many Maxeon Maxeon 6 425W vs Panasonic EverVolt HK 430W panels do I need for an 8 kW system?
For an 8 kW system: you need 19 Maxeon Maxeon 6 425W panels (425W each) or 19 Panasonic EverVolt HK 430W panels (430W each). The Panasonic EverVolt HK 430W requires fewer panels, saving on racking hardware and installation labor.
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Last updated: February 2026