LONGi Hi-MO 6 580W vs Canadian Solar TOPBiHiKu7 580W
The Canadian Solar TOPBiHiKu7 580W wins this comparison by a decisive margin. It offers better long-term durability with 15-year warranty. For most residential installations, the Canadian Solar TOPBiHiKu7 580W is the stronger choice.
Key Differences
- • Both panels are rated at 580W, so the comparison comes down to efficiency, warranty, and technology.
- • LONGi Hi-MO 6 580W achieves 22.3% efficiency vs 22.1% for the other, a 0.2 percentage point gap.
- • Canadian Solar TOPBiHiKu7 580W comes with a 15-year product warranty vs 12 years for the other.
- • Canadian Solar TOPBiHiKu7 580W has a superior temperature coefficient of -0.29%/°C vs -0.34%/°C, retaining more power in hot climates.
- • LONGi Hi-MO 6 580W uses PERC Mono Half-cut cells while Canadian Solar TOPBiHiKu7 580W uses TOPCon N-type Bifacial cells, representing different technology generations.
Specifications Breakdown
Module Efficiency
The LONGi Hi-MO 6 580W achieves 22.3% module efficiency compared to Canadian Solar TOPBiHiKu7 580W's 22.1%, meaning LONGi Hi-MO 6 580W converts 0.2 percentage points more sunlight into electricity per square meter. In practical terms, the LONGi Hi-MO 6 580W produces 224.5 watts per square meter of panel area while the Canadian Solar TOPBiHiKu7 580W produces 224.5 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 580W under standard test conditions (STC), requiring 14 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 Canadian Solar TOPBiHiKu7 580W has a temperature coefficient of -0.29%/°C versus -0.34%/°C for the LONGi Hi-MO 6 580W. On a hot summer day when cell temperature reaches 65°C (40°C above the 25°C STC baseline), the Canadian Solar TOPBiHiKu7 580W retains 94.2% of its rated power while the other retains 93.2%. This difference is particularly significant in hot climates such as the American Southwest, the Middle East, and Southeast Asia, where panels routinely operate 30-40°C above STC for several hours each day. Over the system lifetime, the cumulative energy advantage from a better temperature coefficient can amount to 2-4% of total production.
Warranty Coverage
The LONGi Hi-MO 6 580W is backed by a 12-year product warranty and 25-year performance guarantee, while the Canadian Solar TOPBiHiKu7 580W offers 15-year product and 30-year performance coverage. The Canadian Solar TOPBiHiKu7 580W provides 3 additional years of defect protection, covering manufacturing issues, material failures, and premature performance loss. Based on their published degradation rates (1.5% first year then 0.5%/year for LONGi Hi-MO 6 580W; 1% first year then 0.4%/year for Canadian Solar TOPBiHiKu7 580W), after 25 years the LONGi Hi-MO 6 580W should retain approximately 86.5% of original output versus 89.4% for the Canadian Solar TOPBiHiKu7 580W. This 2.9 percentage point gap in end-of-life output meaningfully impacts lifetime energy economics.
Physical Dimensions & Weight
The LONGi Hi-MO 6 580W measures 2278×1134×35mm and weighs 28.4 kg, while the Canadian Solar TOPBiHiKu7 580W measures 2278×1134×35mm at 28.5 kg. 2.58 m² of panel area for the LONGi Hi-MO 6 580W versus 2.58 m² for the Canadian Solar TOPBiHiKu7 580W. Their weights are closely matched, so neither panel imposes a significantly different structural load on the mounting system. Similar footprints mean both panels fit comparably on standard residential rooftop configurations.
Specification Comparison
| Specification | LONGi Hi-MO 6 580W | Canadian Solar TOPBiHiKu7 580W |
|---|---|---|
| Power | 580W | 580W |
| Efficiency | 22.3% | 22.1% |
| Power Density | 20.9 W/sq ft | 20.9 W/sq ft |
| Cell Type | PERC Mono Half-cut | TOPCon N-type Bifacial |
| Bifacial | No | Yes |
| Weight | 28.4 kg | 28.5 kg |
| Temp Coefficient | -0.34%/°C | -0.29%/°C |
| Snow Load | 5400 Pa | 5400 Pa |
| Wind Load | 2400 Pa | 2400 Pa |
| Product Warranty | 12 years | 15 years |
| Performance Warranty | 25 years | 30 years |
| Degradation (Year 1) | 1.5% | 1% |
| Annual Degradation | 0.5% | 0.4% |
| Country | China | China |
5-Dimension Head-to-Head Analysis
1. Efficiency & Power Density
Winner: LONGi Hi-MO 6 580WThe LONGi Hi-MO 6 580W achieves 22.3% efficiency versus 22.1% — a 0.2 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: Canadian Solar TOPBiHiKu7 580WThe Canadian Solar TOPBiHiKu7 580W has a better temperature coefficient of -0.29%/°C versus -0.34%/°C. On a 45°C summer day (20°C above STC), the winner retains 94.2% of rated power versus 93.2%. This is a meaningful difference in hot states like Arizona, Texas, and Florida.
3. Durability & Warranty
Winner: Canadian Solar TOPBiHiKu7 580WCanadian Solar TOPBiHiKu7 580W leads with a 15-year product warranty versus 12 years. Canadian Solar TOPBiHiKu7 580W degrades more slowly at 0.4% per year versus 0.5%. After 25 years, expect 86.5% vs 89.4% of original output for LONGi Hi-MO 6 580W and Canadian Solar TOPBiHiKu7 580W respectively.
4. Power Output
Winner: TieBoth panels deliver 580W — identical power output per panel. System cost per watt will be the deciding factor.
5. Cell Technology
Winner: Canadian Solar TOPBiHiKu7 580WThe LONGi Hi-MO 6 580W uses PERC Mono Half-cut: PERC (Passivated Emitter Rear Cell) is the current mainstream technology, offering good efficiency at the lowest manufacturing cost. The Canadian Solar TOPBiHiKu7 580W uses TOPCon N-type Bifacial: 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. TOPCon N-type Bifacial represents a newer generation technology with a longer performance runway as manufacturing matures.
LONGi Hi-MO 6 580W
LONGi Hi-MO 6 is a high-performance PERC mono half-cut panel delivering 580W with 22.3% efficiency, ideal for residential and commercial rooftops.
Pros
- + High 22.3% efficiency
- + Proven PERC technology
- + Strong bifacial gain potential
- + Competitive pricing
Cons
- - Large physical size
- - Requires compatible racking
- - Limited US availability
Canadian Solar TOPBiHiKu7 580W
Canadian Solar's TOPBiHiKu7 combines N-type TOPCon and bifacial technology for 580W output with excellent rear-side energy gain.
Pros
- + Bifacial design
- + Strong N-type efficiency
- + Good for ground mounts
- + Bankable manufacturer
Cons
- - Requires elevated mounting for bifacial gain
- - Heavy panel
- - Higher cost than PERC
Choose LONGi Hi-MO 6 580W If...
- ✓ Your roof space is limited and you need maximum power per panel
- ✓ Homeowners wanting high-output PERC performance at a competitive price.
Choose Canadian Solar TOPBiHiKu7 580W If...
- ✓ Long-term warranty protection is a top priority and you plan to stay in your home for 15+ 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
- ✓ You prefer newer cell technology with a longer performance improvement runway
- ✓ Ground-mount installations that can benefit from bifacial energy production.
Our Recommendation
The Canadian Solar TOPBiHiKu7 580W is the decisive winner in this solar panel comparison, outperforming the LONGi Hi-MO 6 580W in 3 of 5 dimensions. Unless you have a specific requirement that the LONGi Hi-MO 6 580W uniquely addresses, the Canadian Solar TOPBiHiKu7 580W is the stronger choice for virtually every installation scenario.
Frequently Asked Questions
Which is better, LONGi Hi-MO 6 580W or Canadian Solar TOPBiHiKu7 580W?
The Canadian Solar TOPBiHiKu7 580W wins this comparison by a decisive margin. It offers better long-term durability with 15-year warranty. For most residential installations, the Canadian Solar TOPBiHiKu7 580W is the stronger choice.
Which panel is more efficient, LONGi Hi-MO 6 580W or Canadian Solar TOPBiHiKu7 580W?
The LONGi Hi-MO 6 580W at 22.3% 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 0W per panel under standard test conditions.
Which has a better warranty, LONGi Hi-MO 6 580W or Canadian Solar TOPBiHiKu7 580W?
The LONGi Hi-MO 6 580W comes with a 12-year product warranty and 25-year performance guarantee. The Canadian Solar TOPBiHiKu7 580W offers 15-year product and 30-year performance warranties. Canadian Solar TOPBiHiKu7 580W provides 3 additional years of product coverage.
Which panel performs better in hot weather?
The LONGi Hi-MO 6 580W has a temperature coefficient of -0.34%/°C and the Canadian Solar TOPBiHiKu7 580W is -0.29%/°C. Canadian Solar TOPBiHiKu7 580W 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 6 580W vs Canadian Solar TOPBiHiKu7 580W panels do I need for an 8 kW system?
For an 8 kW system: you need 14 LONGi Hi-MO 6 580W panels (580W each) or 14 Canadian Solar TOPBiHiKu7 580W panels (580W each). Both require the same number of panels.
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Last updated: February 2026