Yingli Solar YLM 144 Cell 550W vs Aptos Solar DNA-144-BF10 550W DG
The Aptos Solar DNA-144-BF10 550W DG wins this comparison by a decisive margin. It offers better long-term durability with 30-year warranty. For most residential installations, the Aptos Solar DNA-144-BF10 550W DG is the stronger choice.
Key Differences
- • Both panels are rated at 550W, so the comparison comes down to efficiency, warranty, and technology.
- • Both achieve identical 21.3% module efficiency.
- • Aptos Solar DNA-144-BF10 550W DG comes with a 30-year product warranty vs 12 years for the other.
- • Yingli Solar YLM 144 Cell 550W has a superior temperature coefficient of -0.34%/°C vs -0.39%/°C, retaining more power in hot climates.
- • Yingli Solar YLM 144 Cell 550W uses PERC Mono cells while Aptos Solar DNA-144-BF10 550W DG uses PERC Mono Bifacial cells, representing different technology generations.
Specifications Breakdown
Module Efficiency
Both the Yingli Solar YLM 144 Cell 550W and Aptos Solar DNA-144-BF10 550W DG share identical 21.3% module efficiency, producing comparable power per unit area. The Yingli Solar YLM 144 Cell 550W generates 212.9 W/m² while the Aptos Solar DNA-144-BF10 550W DG generates 212.9 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
Both panels are rated at 550W under standard test conditions (STC), requiring 15 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 Yingli Solar YLM 144 Cell 550W has a temperature coefficient of -0.34%/°C versus -0.39%/°C for the Aptos Solar DNA-144-BF10 550W DG. On a hot summer day when cell temperature reaches 65°C (40°C above the 25°C STC baseline), the Yingli Solar YLM 144 Cell 550W retains 93.2% of its rated power while the other retains 92.2%. 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 Yingli Solar YLM 144 Cell 550W is backed by a 12-year product warranty and 25-year performance guarantee, while the Aptos Solar DNA-144-BF10 550W DG offers 30-year product and 30-year performance coverage. The Aptos Solar DNA-144-BF10 550W DG provides 18 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 Yingli Solar YLM 144 Cell 550W; 1% first year then 0.54%/year for Aptos Solar DNA-144-BF10 550W DG), after 25 years the Yingli Solar YLM 144 Cell 550W should retain approximately 86.5% of original output versus 86.0% for the Aptos Solar DNA-144-BF10 550W DG. The end-of-life output levels are closely matched.
Physical Dimensions & Weight
The Yingli Solar YLM 144 Cell 550W measures 2278×1134×35mm and weighs 28.5 kg, while the Aptos Solar DNA-144-BF10 550W DG measures 2278×1134×35mm at 32.3 kg. 2.58 m² of panel area for the Yingli Solar YLM 144 Cell 550W versus 2.58 m² for the Aptos Solar DNA-144-BF10 550W DG. The Yingli Solar YLM 144 Cell 550W is 3.8 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 76 kg. Similar footprints mean both panels fit comparably on standard residential rooftop configurations.
Specification Comparison
| Specification | Yingli Solar YLM 144 Cell 550W | Aptos Solar DNA-144-BF10 550W DG |
|---|---|---|
| Power | 550W | 550W |
| Efficiency | 21.3% | 21.3% |
| Power Density | 19.8 W/sq ft | 19.8 W/sq ft |
| Cell Type | PERC Mono | PERC Mono Bifacial |
| Bifacial | No | Yes |
| Weight | 28.5 kg | 32.3 kg |
| Temp Coefficient | -0.34%/°C | -0.39%/°C |
| Snow Load | 5400 Pa | 5400 Pa |
| Wind Load | 2400 Pa | 4000 Pa |
| Product Warranty | 12 years | 30 years |
| Performance Warranty | 25 years | 30 years |
| Degradation (Year 1) | 1.5% | 1% |
| Annual Degradation | 0.5% | 0.54% |
| Country | China | Vietnam |
5-Dimension Head-to-Head Analysis
1. Efficiency & Power Density
Winner: TieBoth panels achieve 21.3% module efficiency, producing identical power per square meter. Neither has an advantage in space-constrained installations.
2. Hot Climate Performance
Winner: Yingli Solar YLM 144 Cell 550WThe Yingli Solar YLM 144 Cell 550W has a better temperature coefficient of -0.34%/°C versus -0.39%/°C. On a 45°C summer day (20°C above STC), the winner retains 93.2% of rated power versus 92.2%. The difference is modest but accumulates over 25 years of summer production.
3. Durability & Warranty
Winner: Aptos Solar DNA-144-BF10 550W DGAptos Solar DNA-144-BF10 550W DG leads with a 30-year product warranty versus 12 years. Yingli Solar YLM 144 Cell 550W degrades more slowly at 0.5% per year versus 0.54%. After 25 years, expect 86.5% vs 86.0% of original output for Yingli Solar YLM 144 Cell 550W and Aptos Solar DNA-144-BF10 550W DG respectively.
4. Power Output
Winner: TieBoth panels deliver 550W — identical power output per panel. System cost per watt will be the deciding factor.
5. Cell Technology
Winner: TieThe 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. The Aptos Solar DNA-144-BF10 550W DG uses PERC Mono Bifacial: PERC (Passivated Emitter Rear Cell) is the current mainstream technology, offering good efficiency at the lowest manufacturing cost. Both are equivalent-generation technologies.
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
Aptos Solar DNA-144-BF10 550W DG
Aptos Solar DNA-144-BF10 550W DG is a high-power bifacial dual-glass panel delivering up to 688W with 25% rear-side gain, designed for commercial and utility-scale installations.
Pros
- + 550W high power output, up to 688W with bifacial gain
- + Dual-glass construction for extreme durability
- + 70% bifaciality factor
- + 30-year product and performance warranty
Cons
- - Heavy at 32.3 kg requires robust mounting
- - Large dimensions limit residential use
- - Higher temperature coefficient of -0.39%/C
Choose Yingli Solar YLM 144 Cell 550W If...
- ✓ 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
- ✓ Commercial projects seeking affordable high-output PERC modules.
Choose Aptos Solar DNA-144-BF10 550W DG If...
- ✓ Long-term warranty protection is a top priority and you plan to stay in your home for 30+ years
- ✓ Commercial and utility-scale installations requiring maximum energy density with bifacial dual-glass durability.
Our Recommendation
The Aptos Solar DNA-144-BF10 550W DG is the decisive winner in this solar panel comparison, outperforming the Yingli Solar YLM 144 Cell 550W in 1 of 5 dimensions. Unless you have a specific requirement that the Yingli Solar YLM 144 Cell 550W uniquely addresses, the Aptos Solar DNA-144-BF10 550W DG is the stronger choice for virtually every installation scenario.
Frequently Asked Questions
Which is better, Yingli Solar YLM 144 Cell 550W or Aptos Solar DNA-144-BF10 550W DG?
The Aptos Solar DNA-144-BF10 550W DG wins this comparison by a decisive margin. It offers better long-term durability with 30-year warranty. For most residential installations, the Aptos Solar DNA-144-BF10 550W DG is the stronger choice.
Which panel is more efficient, Yingli Solar YLM 144 Cell 550W or Aptos Solar DNA-144-BF10 550W DG?
The both panels share 21.3% module efficiency. Higher efficiency means more watts per square foot of roof space, which is critical for space-constrained installations. The difference of 0.0 percentage points translates to approximately 0W per panel under standard test conditions.
Which has a better warranty, Yingli Solar YLM 144 Cell 550W or Aptos Solar DNA-144-BF10 550W DG?
The Yingli Solar YLM 144 Cell 550W comes with a 12-year product warranty and 25-year performance guarantee. The Aptos Solar DNA-144-BF10 550W DG offers 30-year product and 30-year performance warranties. Aptos Solar DNA-144-BF10 550W DG provides 18 additional years of product coverage.
Which panel performs better in hot weather?
The Yingli Solar YLM 144 Cell 550W has a temperature coefficient of -0.34%/°C and the Aptos Solar DNA-144-BF10 550W DG is -0.39%/°C. Yingli Solar YLM 144 Cell 550W retains more power in heat — important in states like Arizona, Texas, and Florida. A lower (less negative) temperature coefficient is better.
How many Yingli Solar YLM 144 Cell 550W vs Aptos Solar DNA-144-BF10 550W DG panels do I need for an 8 kW system?
For an 8 kW system: you need 15 Yingli Solar YLM 144 Cell 550W panels (550W each) or 15 Aptos Solar DNA-144-BF10 550W DG panels (550W each). Both require the same number of panels.
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Last updated: February 2026