Canadian Solar TOPBiHiKu7 580W vs Yingli Solar YLM 144 Cell 550W
The Canadian Solar TOPBiHiKu7 580W wins this comparison by a decisive margin. It leads in efficiency (22.1% vs 21.3%) and matches or exceeds on warranty (15 vs 12 years). For most residential installations, the Canadian Solar TOPBiHiKu7 580W is the stronger choice.
Key Differences
- • Canadian Solar TOPBiHiKu7 580W is rated at 580W while Yingli Solar YLM 144 Cell 550W is rated at 550W, a 30W difference.
- • Canadian Solar TOPBiHiKu7 580W achieves 22.1% efficiency vs 21.3% for the other, a 0.8 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.
- • Canadian Solar TOPBiHiKu7 580W uses TOPCon N-type Bifacial cells while Yingli Solar YLM 144 Cell 550W uses PERC Mono cells, representing different technology generations.
Specifications Breakdown
Module Efficiency
The Canadian Solar TOPBiHiKu7 580W achieves 22.1% module efficiency compared to Yingli Solar YLM 144 Cell 550W's 21.3%, meaning Canadian Solar TOPBiHiKu7 580W converts 0.8 percentage points more sunlight into electricity per square meter. In practical terms, the Canadian Solar TOPBiHiKu7 580W produces 224.5 watts per square meter of panel area while the Yingli Solar YLM 144 Cell 550W produces 212.9 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 Canadian Solar TOPBiHiKu7 580W delivers 580W per panel versus 550W for the Yingli Solar YLM 144 Cell 550W, a 30W difference per module. To build an 8 kW residential system, you would need 14 Canadian Solar TOPBiHiKu7 580W panels or 15 Yingli Solar YLM 144 Cell 550W 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 Canadian Solar TOPBiHiKu7 580W has a temperature coefficient of -0.29%/°C versus -0.34%/°C for the Yingli Solar YLM 144 Cell 550W. 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 Canadian Solar TOPBiHiKu7 580W is backed by a 15-year product warranty and 30-year performance guarantee, while the Yingli Solar YLM 144 Cell 550W offers 12-year product and 25-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% first year then 0.4%/year for Canadian Solar TOPBiHiKu7 580W; 1.5% first year then 0.5%/year for Yingli Solar YLM 144 Cell 550W), after 25 years the Canadian Solar TOPBiHiKu7 580W should retain approximately 89.4% of original output versus 86.5% for the Yingli Solar YLM 144 Cell 550W. This 2.9 percentage point gap in end-of-life output meaningfully impacts lifetime energy economics.
Physical Dimensions & Weight
The Canadian Solar TOPBiHiKu7 580W measures 2278×1134×35mm and weighs 28.5 kg, while the Yingli Solar YLM 144 Cell 550W measures 2278×1134×35mm at 28.5 kg. 2.58 m² of panel area for the Canadian Solar TOPBiHiKu7 580W versus 2.58 m² for the Yingli Solar YLM 144 Cell 550W. 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 | Canadian Solar TOPBiHiKu7 580W | Yingli Solar YLM 144 Cell 550W |
|---|---|---|
| Power | 580W | 550W |
| Efficiency | 22.1% | 21.3% |
| Power Density | 20.9 W/sq ft | 19.8 W/sq ft |
| Cell Type | TOPCon N-type Bifacial | PERC Mono |
| Bifacial | Yes | No |
| Weight | 28.5 kg | 28.5 kg |
| Temp Coefficient | -0.29%/°C | -0.34%/°C |
| Snow Load | 5400 Pa | 5400 Pa |
| Wind Load | 2400 Pa | 2400 Pa |
| Product Warranty | 15 years | 12 years |
| Performance Warranty | 30 years | 25 years |
| Degradation (Year 1) | 1% | 1.5% |
| Annual Degradation | 0.4% | 0.5% |
| Country | China | China |
5-Dimension Head-to-Head Analysis
1. Efficiency & Power Density
Winner: Canadian Solar TOPBiHiKu7 580WThe Canadian Solar TOPBiHiKu7 580W achieves 22.1% efficiency versus 21.3% — a 0.8 percentage point advantage. On a typical 30-panel residential roof, this translates to approximately 0.9 kW more total system capacity, or 5 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 89.4% vs 86.5% of original output for Canadian Solar TOPBiHiKu7 580W and Yingli Solar YLM 144 Cell 550W respectively.
4. Power Output
Winner: Canadian Solar TOPBiHiKu7 580WThe Canadian Solar TOPBiHiKu7 580W delivers 580W versus 550W per panel — 30W more. For an 8 kW system, you need 14 panels with the higher-wattage option versus 15 panels, saving 1 panels and the associated racking and labor costs.
5. Cell Technology
Winner: Canadian Solar TOPBiHiKu7 580WThe 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. The Yingli Solar YLM 144 Cell 550W uses PERC Mono: PERC (Passivated Emitter Rear Cell) is the current mainstream technology, offering good efficiency at the lowest manufacturing cost. TOPCon N-type Bifacial represents a newer generation technology with a longer performance runway as manufacturing matures.
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
Yingli Solar YLM 144 Cell 550W
Yingli Solar YLM 144 Cell is a high-output PERC module for commercial installations at a competitive price point.
Pros
- + High 550W output
- + Competitive commercial pricing
- + Proven track record
- + Large format
Cons
- - Older PERC technology
- - Heavy panel
- - Brand perception concerns
Choose Canadian Solar TOPBiHiKu7 580W If...
- ✓ Your roof space is limited and you need maximum power per panel
- ✓ 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 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
Choose Yingli Solar YLM 144 Cell 550W If...
- ✓ Commercial projects seeking affordable high-output PERC modules.
Our Recommendation
The Canadian Solar TOPBiHiKu7 580W is the decisive winner in this solar panel comparison, outperforming the Yingli Solar YLM 144 Cell 550W in 5 of 5 dimensions. Unless you have a specific requirement that the Yingli Solar YLM 144 Cell 550W uniquely addresses, the Canadian Solar TOPBiHiKu7 580W is the stronger choice for virtually every installation scenario.
Frequently Asked Questions
Which is better, Canadian Solar TOPBiHiKu7 580W or Yingli Solar YLM 144 Cell 550W?
The Canadian Solar TOPBiHiKu7 580W wins this comparison by a decisive margin. It leads in efficiency (22.1% vs 21.3%) and matches or exceeds on warranty (15 vs 12 years). For most residential installations, the Canadian Solar TOPBiHiKu7 580W is the stronger choice.
Which panel is more efficient, Canadian Solar TOPBiHiKu7 580W or Yingli Solar YLM 144 Cell 550W?
The Canadian Solar TOPBiHiKu7 580W at 22.1% module efficiency. Higher efficiency means more watts per square foot of roof space, which is critical for space-constrained installations. The difference of 0.8 percentage points translates to approximately 30W per panel under standard test conditions.
Which has a better warranty, Canadian Solar TOPBiHiKu7 580W or Yingli Solar YLM 144 Cell 550W?
The Canadian Solar TOPBiHiKu7 580W comes with a 15-year product warranty and 30-year performance guarantee. The Yingli Solar YLM 144 Cell 550W offers 12-year product and 25-year performance warranties. Canadian Solar TOPBiHiKu7 580W provides 3 additional years of product coverage.
Which panel performs better in hot weather?
The Canadian Solar TOPBiHiKu7 580W has a temperature coefficient of -0.29%/°C and the Yingli Solar YLM 144 Cell 550W is -0.34%/°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 Canadian Solar TOPBiHiKu7 580W vs Yingli Solar YLM 144 Cell 550W panels do I need for an 8 kW system?
For an 8 kW system: you need 14 Canadian Solar TOPBiHiKu7 580W panels (580W each) or 15 Yingli Solar YLM 144 Cell 550W panels (550W each). The Canadian Solar TOPBiHiKu7 580W requires fewer panels, saving on racking hardware and installation labor.
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Last updated: February 2026