Maxeon Maxeon 7 470W vs LONGi Hi-MO X6 Max 470W
The Maxeon Maxeon 7 470W wins this comparison by a decisive margin. It leads in efficiency (22.8% vs 22.3%) and matches or exceeds on warranty (40 vs 15 years). For most residential installations, the Maxeon Maxeon 7 470W is the stronger choice.
Key Differences
- • Both panels are rated at 470W, so the comparison comes down to efficiency, warranty, and technology.
- • Maxeon Maxeon 7 470W achieves 22.8% efficiency vs 22.3% for the other, a 0.5 percentage point gap.
- • Maxeon Maxeon 7 470W comes with a 40-year product warranty vs 15 years for the other.
- • Maxeon Maxeon 7 470W has a superior temperature coefficient of -0.27%/°C vs -0.29%/°C, retaining more power in hot climates.
- • Maxeon Maxeon 7 470W uses IBC (Interdigitated Back Contact) cells while LONGi Hi-MO X6 Max 470W uses TOPCon N-type cells, representing different technology generations.
Specifications Breakdown
Module Efficiency
The Maxeon Maxeon 7 470W achieves 22.8% module efficiency compared to LONGi Hi-MO X6 Max 470W's 22.3%, meaning Maxeon Maxeon 7 470W converts 0.5 percentage points more sunlight into electricity per square meter. In practical terms, the Maxeon Maxeon 7 470W produces 243.3 watts per square meter of panel area while the LONGi Hi-MO X6 Max 470W produces 235.2 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
Both panels are rated at 470W under standard test conditions (STC), requiring 18 panels each to build an 8 kW system. With identical wattage ratings, the power output dimension is a draw and does not favor either panel. The real differentiators become efficiency density, temperature behavior, and long-term degradation rates which determine actual field performance beyond the nameplate rating.
Temperature Coefficient
The Maxeon Maxeon 7 470W has a temperature coefficient of -0.27%/°C versus -0.29%/°C for the LONGi Hi-MO X6 Max 470W. On a hot summer day when cell temperature reaches 65°C (40°C above the 25°C STC baseline), the Maxeon Maxeon 7 470W retains 94.6% of its rated power while the other retains 94.2%. 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 7 470W is backed by a 40-year product warranty and 40-year performance guarantee, while the LONGi Hi-MO X6 Max 470W offers 15-year product and 30-year performance coverage. The Maxeon Maxeon 7 470W provides 25 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 7 470W; 1% first year then 0.4%/year for LONGi Hi-MO X6 Max 470W), after 25 years the Maxeon Maxeon 7 470W should retain approximately 93.8% of original output versus 89.4% for the LONGi Hi-MO X6 Max 470W. This 4.4 percentage point gap in end-of-life output meaningfully impacts lifetime energy economics.
Physical Dimensions & Weight
The Maxeon Maxeon 7 470W measures 1872×1032×30mm and weighs 21 kg, while the LONGi Hi-MO X6 Max 470W measures 1762×1134×30mm at 23.5 kg. 1.93 m² of panel area for the Maxeon Maxeon 7 470W versus 2.00 m² for the LONGi Hi-MO X6 Max 470W. The Maxeon Maxeon 7 470W is 2.5 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 50 kg. Similar footprints mean both panels fit comparably on standard residential rooftop configurations.
Specification Comparison
| Specification | Maxeon Maxeon 7 470W | LONGi Hi-MO X6 Max 470W |
|---|---|---|
| Power | 470W | 470W |
| Efficiency | 22.8% | 22.3% |
| Power Density | 22.6 W/sq ft | 21.9 W/sq ft |
| Cell Type | IBC (Interdigitated Back Contact) | TOPCon N-type |
| Bifacial | Yes | Yes |
| Weight | 21 kg | 23.5 kg |
| Temp Coefficient | -0.27%/°C | -0.29%/°C |
| Snow Load | 5400 Pa | 5400 Pa |
| Wind Load | 3600 Pa | 2400 Pa |
| Product Warranty | 40 years | 15 years |
| Performance Warranty | 40 years | 30 years |
| Degradation (Year 1) | 0.25% | 1% |
| Annual Degradation | 0.25% | 0.4% |
| Country | Malaysia | China |
5-Dimension Head-to-Head Analysis
1. Efficiency & Power Density
Winner: Maxeon Maxeon 7 470WThe Maxeon Maxeon 7 470W achieves 22.8% efficiency versus 22.3% — a 0.5 percentage point advantage. On a typical 30-panel residential roof, this translates to approximately 0.0 kW more total system capacity, or 0 kWh more annual production in an average US location.
2. Hot Climate Performance
Winner: Maxeon Maxeon 7 470WThe Maxeon Maxeon 7 470W has a better temperature coefficient of -0.27%/°C versus -0.29%/°C. On a 45°C summer day (20°C above STC), the winner retains 94.6% of rated power versus 94.2%. The difference is modest but accumulates over 25 years of summer production.
3. Durability & Warranty
Winner: Maxeon Maxeon 7 470WMaxeon Maxeon 7 470W leads with a 40-year product warranty versus 15 years. Maxeon Maxeon 7 470W 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 7 470W and LONGi Hi-MO X6 Max 470W respectively.
4. Power Output
Winner: TieBoth panels deliver 470W — identical power output per panel. System cost per watt will be the deciding factor.
5. Cell Technology
Winner: Maxeon Maxeon 7 470WThe Maxeon Maxeon 7 470W 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 LONGi Hi-MO X6 Max 470W 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 7 470W
The Maxeon 7 470W uses fifth-generation IBC (Interdigitated Back Contact) cells that are 65% larger than previous generations, achieving 22.8% panel efficiency with an industry-leading 40-year warranty and the lowest degradation rate in the industry (0.25%/year). The patented back-contact copper foundation provides exceptional crack resistance and eliminates front-surface gridlines for a clean all-black aesthetic. Cradle to Cradle Certified Silver. Note: US availability limited since July 2024 due to CBP detentions.
Pros
- + 22.8% efficiency with Gen 5 IBC back-contact cells — no front gridlines
- + Industry-leading 40-year warranty with 1-in-20,000 historical failure rate
- + Lowest degradation: 0.25%/year, guaranteed 88.25% output at year 40
- + Copper-backed cells maintain conductivity even if silicon cracks
- + Cradle to Cradle Certified Silver sustainability credential
Cons
- - Premium pricing at ~$3.35/W (40-80% more than mainstream panels)
- - US availability severely limited since July 2024 CBP detentions
- - Maxeon is independent from bankrupt SunPower but faces financial pressures
LONGi Hi-MO X6 Max 470W
The Hi-MO X6 Max delivers 470W in a mid-size format with N-type TOPCon technology, bridging the gap between compact and large panels.
Pros
- + Mid-size versatility
- + N-type TOPCon efficiency
- + Good power-to-size ratio
- + LONGi reliability
Cons
- - Mid-range pricing
- - Not the highest output
- - Standard warranty
Choose Maxeon Maxeon 7 470W 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
- ✓ Space-constrained premium residential installations where maximum efficiency, aesthetics, and 40-year longevity justify the price premium. Check US availability before ordering.
Choose LONGi Hi-MO X6 Max 470W If...
- ✓ You prefer newer cell technology with a longer performance improvement runway
- ✓ Medium-sized residential roofs wanting a balance of size and N-type performance.
Our Recommendation
The Maxeon Maxeon 7 470W is the decisive winner in this solar panel comparison, outperforming the LONGi Hi-MO X6 Max 470W in 4 of 5 dimensions. Unless you have a specific requirement that the LONGi Hi-MO X6 Max 470W uniquely addresses, the Maxeon Maxeon 7 470W is the stronger choice for virtually every installation scenario.
Frequently Asked Questions
Which is better, Maxeon Maxeon 7 470W or LONGi Hi-MO X6 Max 470W?
The Maxeon Maxeon 7 470W wins this comparison by a decisive margin. It leads in efficiency (22.8% vs 22.3%) and matches or exceeds on warranty (40 vs 15 years). For most residential installations, the Maxeon Maxeon 7 470W is the stronger choice.
Which panel is more efficient, Maxeon Maxeon 7 470W or LONGi Hi-MO X6 Max 470W?
The Maxeon Maxeon 7 470W at 22.8% module efficiency. Higher efficiency means more watts per square foot of roof space, which is critical for space-constrained installations. The difference of 0.5 percentage points translates to approximately 0W per panel under standard test conditions.
Which has a better warranty, Maxeon Maxeon 7 470W or LONGi Hi-MO X6 Max 470W?
The Maxeon Maxeon 7 470W comes with a 40-year product warranty and 40-year performance guarantee. The LONGi Hi-MO X6 Max 470W offers 15-year product and 30-year performance warranties. Maxeon Maxeon 7 470W provides 25 additional years of product coverage.
Which panel performs better in hot weather?
The Maxeon Maxeon 7 470W has a temperature coefficient of -0.27%/°C and the LONGi Hi-MO X6 Max 470W is -0.29%/°C. Maxeon Maxeon 7 470W 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 7 470W vs LONGi Hi-MO X6 Max 470W panels do I need for an 8 kW system?
For an 8 kW system: you need 18 Maxeon Maxeon 7 470W panels (470W each) or 18 LONGi Hi-MO X6 Max 470W panels (470W each). Both require the same number of panels.
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Last updated: February 2026