Maxeon Maxeon 6 425W vs Hyundai HiE-S485VG
The Maxeon Maxeon 6 425W wins this comparison by a decisive margin. It leads in efficiency (22.2% vs 22%) and matches or exceeds on warranty (40 vs 25 years). For most residential installations, the Maxeon Maxeon 6 425W is the stronger choice.
Key Differences
- • Maxeon Maxeon 6 425W is rated at 425W while Hyundai HiE-S485VG is rated at 485W, a 60W difference.
- • Maxeon Maxeon 6 425W achieves 22.2% efficiency vs 22% for the other, a 0.2 percentage point gap.
- • Maxeon Maxeon 6 425W comes with a 40-year product warranty vs 25 years for the other.
- • Maxeon Maxeon 6 425W has a superior temperature coefficient of -0.27%/°C vs -0.3%/°C, retaining more power in hot climates.
- • Maxeon Maxeon 6 425W uses IBC (Interdigitated Back Contact) cells while Hyundai HiE-S485VG uses TOPCon N-type cells, representing different technology generations.
Specifications Breakdown
Module Efficiency
The Maxeon Maxeon 6 425W achieves 22.2% module efficiency compared to Hyundai HiE-S485VG's 22%, meaning Maxeon Maxeon 6 425W converts 0.2 percentage points more sunlight into electricity per square meter. In practical terms, the Maxeon Maxeon 6 425W produces 220.0 watts per square meter of panel area while the Hyundai HiE-S485VG produces 222.9 W/m². For rooftop installations where space is limited, this efficiency gap determines how many kilowatts you can fit on your available roof area. Over a 25-year system life, even a small efficiency advantage compounds into meaningful additional energy production.
Power Output
The Hyundai HiE-S485VG delivers 485W per panel versus 425W for the Maxeon Maxeon 6 425W, a 60W difference per module. To build an 8 kW residential system, you would need 19 Maxeon Maxeon 6 425W panels or 17 Hyundai HiE-S485VG panels. Choosing the higher-wattage option saves 2 panels, reducing total racking hardware, wiring, and installation labor costs. Higher wattage per panel is particularly valuable for commercial-scale installations where panel count directly impacts balance-of-system costs.
Temperature Coefficient
The Maxeon Maxeon 6 425W has a temperature coefficient of -0.27%/°C versus -0.3%/°C for the Hyundai HiE-S485VG. On a hot summer day when cell temperature reaches 65°C (40°C above the 25°C STC baseline), the Maxeon Maxeon 6 425W retains 94.6% of its rated power while the other retains 94.0%. 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 Hyundai HiE-S485VG 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; 1% first year then 0.4%/year for Hyundai HiE-S485VG), after 25 years the Maxeon Maxeon 6 425W should retain approximately 93.8% of original output versus 89.4% for the Hyundai HiE-S485VG. This 4.4 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 Hyundai HiE-S485VG measures 2094×1039×35mm at 24.5 kg. 1.93 m² of panel area for the Maxeon Maxeon 6 425W versus 2.18 m² for the Hyundai HiE-S485VG. The Maxeon Maxeon 6 425W is 4.0 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 80 kg. The more compact Maxeon Maxeon 6 425W may be easier to fit on irregularly shaped or space-limited rooftops.
Specification Comparison
| Specification | Maxeon Maxeon 6 425W | Hyundai HiE-S485VG |
|---|---|---|
| Power | 425W | 485W |
| Efficiency | 22.2% | 22% |
| Power Density | 20.4 W/sq ft | 20.7 W/sq ft |
| Cell Type | IBC (Interdigitated Back Contact) | TOPCon N-type |
| Bifacial | Yes | No |
| Weight | 20.5 kg | 24.5 kg |
| Temp Coefficient | -0.27%/°C | -0.3%/°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% | 1% |
| Annual Degradation | 0.25% | 0.4% |
| Country | Malaysia | South Korea |
5-Dimension Head-to-Head Analysis
1. Efficiency & Power Density
Winner: Maxeon Maxeon 6 425WThe Maxeon Maxeon 6 425W achieves 22.2% efficiency versus 22% — a 0.2 percentage point advantage. On a typical 30-panel residential roof, this translates to approximately 1.8 kW more total system capacity, or 9 kWh more annual production in an average US location.
2. Hot Climate Performance
Winner: Maxeon Maxeon 6 425WThe Maxeon Maxeon 6 425W has a better temperature coefficient of -0.27%/°C versus -0.3%/°C. On a 45°C summer day (20°C above STC), the winner retains 94.6% of rated power versus 94.0%. 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 0.4%. After 25 years, expect 93.8% vs 89.4% of original output for Maxeon Maxeon 6 425W and Hyundai HiE-S485VG respectively.
4. Power Output
Winner: Hyundai HiE-S485VGThe Hyundai HiE-S485VG delivers 485W versus 425W per panel — 60W more. For an 8 kW system, you need 17 panels with the higher-wattage option versus 19 panels, saving 2 panels and the associated racking and labor costs.
5. Cell Technology
Winner: Maxeon Maxeon 6 425WThe 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 Hyundai HiE-S485VG uses TOPCon N-type: TOPCon (Tunnel Oxide Passivated Contact) adds a thin tunnel oxide layer to reduce recombination losses, achieving higher efficiency than PERC while being manufacturable on existing production lines. IBC (Interdigitated Back Contact) represents a newer generation technology with a longer performance runway as manufacturing matures.
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
Hyundai HiE-S485VG
The Hyundai HiE-S485VG is a 485W TOPCon N-type panel manufactured in South Korea by Hyundai Energy Solutions, a division of the Hyundai conglomerate. The N-type TOPCon cell technology delivers 22.0% module efficiency with a -0.30%/°C temperature coefficient — significantly better than PERC alternatives in hot climates. Hyundai's Korean manufacturing offers non-Chinese supply chain diversification for buyers concerned about tariffs or UFLPA compliance. The 25+25 year warranty is backed by the Hyundai corporate group's financial stability.
Pros
- + South Korean manufacturing — non-Chinese supply chain diversification
- + TOPCon N-type with 22.0% efficiency and -0.30%/°C temp coefficient
- + Backed by Hyundai conglomerate's financial strength for warranty assurance
- + 25-year product and performance warranties
- + Lower degradation than PERC — 1.0% first year, 0.4% annual
- + Competitively priced for a non-Chinese Tier-1 panel
Cons
- - Lower brand recognition in US solar market than LONGi or JinkoSolar
- - 132-cell format slightly larger than standard 108/120-cell residential panels
- - US dealer network smaller than mainstream brands
- - 485W is mid-range — competitors offer 500W+ in similar sizes
Choose Maxeon Maxeon 6 425W If...
- ✓ Your roof space is limited and you need maximum power per panel
- ✓ Long-term warranty protection is a top priority and you plan to stay in your home for 40+ years
- ✓ You live in a hot climate (Arizona, Texas, Florida) where heat performance matters
- ✓ You want maximum output retention over the system's 25-30 year lifespan
- ✓ Homeowners seeking a premium panel with the longest warranty available.
Choose Hyundai HiE-S485VG If...
- ✓ You want fewer panels to reach your target system size, reducing racking and labor costs
- ✓ You prefer newer cell technology with a longer performance improvement runway
- ✓ Homeowners and commercial buyers seeking Tier-1 Korean-manufactured TOPCon panels with strong corporate warranty backing and non-Chinese supply chain.
Our Recommendation
The Maxeon Maxeon 6 425W is the decisive winner in this solar panel comparison, outperforming the Hyundai HiE-S485VG in 4 of 5 dimensions. Unless you have a specific requirement that the Hyundai HiE-S485VG 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 Hyundai HiE-S485VG?
The Maxeon Maxeon 6 425W wins this comparison by a decisive margin. It leads in efficiency (22.2% vs 22%) and matches or exceeds on warranty (40 vs 25 years). For most residential installations, the Maxeon Maxeon 6 425W is the stronger choice.
Which panel is more efficient, Maxeon Maxeon 6 425W or Hyundai HiE-S485VG?
The Maxeon Maxeon 6 425W at 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 0.2 percentage points translates to approximately 60W per panel under standard test conditions.
Which has a better warranty, Maxeon Maxeon 6 425W or Hyundai HiE-S485VG?
The Maxeon Maxeon 6 425W comes with a 40-year product warranty and 40-year performance guarantee. The Hyundai HiE-S485VG 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 Hyundai HiE-S485VG is -0.3%/°C. Maxeon Maxeon 6 425W 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 Hyundai HiE-S485VG 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 17 Hyundai HiE-S485VG panels (485W each). The Hyundai HiE-S485VG requires fewer panels, saving on racking hardware and installation labor.
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Last updated: February 2026