LONGi Hi-MO X6 445W vs Hyundai HiE-S485VG
The Hyundai HiE-S485VG wins this comparison by a decisive margin. It delivers more power (485W vs 445W). For most residential installations, the Hyundai HiE-S485VG is the stronger choice.
Key Differences
- • LONGi Hi-MO X6 445W is rated at 445W while Hyundai HiE-S485VG is rated at 485W, a 40W difference.
- • Both achieve identical 22% module efficiency.
- • Hyundai HiE-S485VG comes with a 25-year product warranty vs 12 years for the other.
- • LONGi Hi-MO X6 445W has a superior temperature coefficient of -0.29%/°C vs -0.3%/°C, retaining more power in hot climates.
Specifications Breakdown
Module Efficiency
Both the LONGi Hi-MO X6 445W and Hyundai HiE-S485VG share identical 22% module efficiency, producing comparable power per unit area. The LONGi Hi-MO X6 445W generates 227.9 W/m² while the Hyundai HiE-S485VG generates 222.9 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 Hyundai HiE-S485VG delivers 485W per panel versus 445W for the LONGi Hi-MO X6 445W, a 40W difference per module. To build an 8 kW residential system, you would need 18 LONGi Hi-MO X6 445W panels or 17 Hyundai HiE-S485VG panels. Choosing the higher-wattage option saves 1 panel, 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 LONGi Hi-MO X6 445W has a temperature coefficient of -0.29%/°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 LONGi Hi-MO X6 445W retains 94.2% 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 LONGi Hi-MO X6 445W is backed by a 12-year product warranty and 25-year performance guarantee, while the Hyundai HiE-S485VG offers 25-year product and 25-year performance coverage. The Hyundai HiE-S485VG provides 13 additional years of defect protection, covering manufacturing issues, material failures, and premature performance loss. Based on their published degradation rates (1% first year then 0.4%/year for LONGi Hi-MO X6 445W; 1% first year then 0.4%/year for Hyundai HiE-S485VG), after 25 years the LONGi Hi-MO X6 445W should retain approximately 89.4% of original output versus 89.4% for the Hyundai HiE-S485VG. The end-of-life output levels are closely matched.
Physical Dimensions & Weight
The LONGi Hi-MO X6 445W measures 1722×1134×30mm and weighs 21.5 kg, while the Hyundai HiE-S485VG measures 2094×1039×35mm at 24.5 kg. 1.95 m² of panel area for the LONGi Hi-MO X6 445W versus 2.18 m² for the Hyundai HiE-S485VG. The LONGi Hi-MO X6 445W is 3.0 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 60 kg. The more compact LONGi Hi-MO X6 445W may be easier to fit on irregularly shaped or space-limited rooftops.
Specification Comparison
| Specification | LONGi Hi-MO X6 445W | Hyundai HiE-S485VG |
|---|---|---|
| Power | 445W | 485W |
| Efficiency | 22% | 22% |
| Power Density | 21.2 W/sq ft | 20.7 W/sq ft |
| Cell Type | TOPCon N-type | TOPCon N-type |
| Bifacial | Yes | No |
| Weight | 21.5 kg | 24.5 kg |
| Temp Coefficient | -0.29%/°C | -0.3%/°C |
| Snow Load | 5400 Pa | 5400 Pa |
| Wind Load | 2400 Pa | 2400 Pa |
| Product Warranty | 12 years | 25 years |
| Performance Warranty | 25 years | 25 years |
| Degradation (Year 1) | 1% | 1% |
| Annual Degradation | 0.4% | 0.4% |
| Country | China | South Korea |
5-Dimension Head-to-Head Analysis
1. Efficiency & Power Density
Winner: TieBoth panels achieve 22% module efficiency, producing identical power per square meter. Neither has an advantage in space-constrained installations.
2. Hot Climate Performance
Winner: LONGi Hi-MO X6 445WThe LONGi Hi-MO X6 445W has a better temperature coefficient of -0.29%/°C versus -0.3%/°C. On a 45°C summer day (20°C above STC), the winner retains 94.2% of rated power versus 94.0%. The difference is modest but accumulates over 25 years of summer production.
3. Durability & Warranty
Winner: Hyundai HiE-S485VGHyundai HiE-S485VG leads with a 25-year product warranty versus 12 years. After 25 years, expect 89.4% vs 89.4% of original output for LONGi Hi-MO X6 445W and Hyundai HiE-S485VG respectively.
4. Power Output
Winner: Hyundai HiE-S485VGThe Hyundai HiE-S485VG delivers 485W versus 445W per panel — 40W more. For an 8 kW system, you need 17 panels with the higher-wattage option versus 18 panels, saving 1 panels and the associated racking and labor costs.
5. Cell Technology
Winner: TieBoth panels use TOPCon N-type cell technology. No technology advantage for either product.
LONGi Hi-MO X6 445W
The Hi-MO X6 is LONGi's TOPCon N-type line offering 445W in a compact format, well-suited for space-constrained residential rooftops.
Pros
- + Compact size for residential roofs
- + Good N-type TOPCon efficiency
- + Advanced technology
- + Budget-friendly
Cons
- - Lower wattage than larger models
- - Mid-range efficiency for N-type
- - Less suited for very large roofs
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 LONGi Hi-MO X6 445W If...
- ✓ You live in a hot climate (Arizona, Texas, Florida) where heat performance matters
- ✓ You prefer newer cell technology with a longer performance improvement runway
- ✓ Homeowners wanting N-type TOPCon technology in a compact residential format.
Choose Hyundai HiE-S485VG If...
- ✓ You want fewer panels to reach your target system size, reducing racking and labor costs
- ✓ Long-term warranty protection is a top priority and you plan to stay in your home for 25+ years
- ✓ 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 Hyundai HiE-S485VG is the decisive winner in this solar panel comparison, outperforming the LONGi Hi-MO X6 445W in 2 of 5 dimensions. Unless you have a specific requirement that the LONGi Hi-MO X6 445W uniquely addresses, the Hyundai HiE-S485VG is the stronger choice for virtually every installation scenario.
Frequently Asked Questions
Which is better, LONGi Hi-MO X6 445W or Hyundai HiE-S485VG?
The Hyundai HiE-S485VG wins this comparison by a decisive margin. It delivers more power (485W vs 445W). For most residential installations, the Hyundai HiE-S485VG is the stronger choice.
Which panel is more efficient, LONGi Hi-MO X6 445W or Hyundai HiE-S485VG?
The both panels share 22% 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 40W per panel under standard test conditions.
Which has a better warranty, LONGi Hi-MO X6 445W or Hyundai HiE-S485VG?
The LONGi Hi-MO X6 445W comes with a 12-year product warranty and 25-year performance guarantee. The Hyundai HiE-S485VG offers 25-year product and 25-year performance warranties. Hyundai HiE-S485VG provides 13 additional years of product coverage.
Which panel performs better in hot weather?
The LONGi Hi-MO X6 445W has a temperature coefficient of -0.29%/°C and the Hyundai HiE-S485VG is -0.3%/°C. LONGi Hi-MO X6 445W retains more power in heat — important in states like Arizona, Texas, and Florida. A lower (less negative) temperature coefficient is better.
How many LONGi Hi-MO X6 445W vs Hyundai HiE-S485VG panels do I need for an 8 kW system?
For an 8 kW system: you need 18 LONGi Hi-MO X6 445W panels (445W 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