Silfab SIL-370-BK 370W vs Aptos Solar DNA-144-MF26 440W Silver
The Aptos Solar DNA-144-MF26 440W Silver wins this comparison by a narrow margin. It delivers more power (440W vs 370W). For most residential installations, the Aptos Solar DNA-144-MF26 440W Silver is the stronger choice.
Key Differences
- • Silfab SIL-370-BK 370W is rated at 370W while Aptos Solar DNA-144-MF26 440W Silver is rated at 440W, a 70W difference.
- • Silfab SIL-370-BK 370W achieves 20.4% efficiency vs 20.21% for the other, a 0.2 percentage point gap.
- • Both carry matching 25-year product warranties.
Specifications Breakdown
Module Efficiency
The Silfab SIL-370-BK 370W achieves 20.4% module efficiency compared to Aptos Solar DNA-144-MF26 440W Silver's 20.21%, meaning Silfab SIL-370-BK 370W converts 0.2 percentage points more sunlight into electricity per square meter. In practical terms, the Silfab SIL-370-BK 370W produces 189.5 watts per square meter of panel area while the Aptos Solar DNA-144-MF26 440W Silver produces 202.1 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 Aptos Solar DNA-144-MF26 440W Silver delivers 440W per panel versus 370W for the Silfab SIL-370-BK 370W, a 70W difference per module. To build an 8 kW residential system, you would need 22 Silfab SIL-370-BK 370W panels or 19 Aptos Solar DNA-144-MF26 440W Silver panels. Choosing the higher-wattage option saves 3 panels, 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
Both panels share an identical temperature coefficient of -0.35%/°C, meaning they lose power at the same rate as cell temperature rises above the 25°C standard test baseline. At 65°C cell temperature, both retain 93.0% of rated power. Neither panel has a thermal performance advantage, which makes this specification a non-factor in the comparison.
Warranty Coverage
The Silfab SIL-370-BK 370W is backed by a 25-year product warranty and 25-year performance guarantee, while the Aptos Solar DNA-144-MF26 440W Silver offers 25-year product and 30-year performance coverage. Both offer identical product warranty duration. Based on their published degradation rates (1% first year then 0.4%/year for Silfab SIL-370-BK 370W; 1% first year then 0.54%/year for Aptos Solar DNA-144-MF26 440W Silver), after 25 years the Silfab SIL-370-BK 370W should retain approximately 89.4% of original output versus 86.0% for the Aptos Solar DNA-144-MF26 440W Silver. This 3.4 percentage point gap in end-of-life output meaningfully impacts lifetime energy economics.
Physical Dimensions & Weight
The Silfab SIL-370-BK 370W measures 1722×1134×30mm and weighs 19.5 kg, while the Aptos Solar DNA-144-MF26 440W Silver measures 2095×1039×40mm at 24.1 kg. 1.95 m² of panel area for the Silfab SIL-370-BK 370W versus 2.18 m² for the Aptos Solar DNA-144-MF26 440W Silver. The Silfab SIL-370-BK 370W is 4.6 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 92 kg. The more compact Silfab SIL-370-BK 370W may be easier to fit on irregularly shaped or space-limited rooftops.
Specification Comparison
| Specification | Silfab SIL-370-BK 370W | Aptos Solar DNA-144-MF26 440W Silver |
|---|---|---|
| Power | 370W | 440W |
| Efficiency | 20.4% | 20.21% |
| Power Density | 17.6 W/sq ft | 18.8 W/sq ft |
| Cell Type | PERC Mono | PERC Mono |
| Bifacial | No | No |
| Weight | 19.5 kg | 24.1 kg |
| Temp Coefficient | -0.35%/°C | -0.35%/°C |
| Snow Load | 2400 Pa | 5400 Pa |
| Wind Load | 2400 Pa | 4000 Pa |
| Product Warranty | 25 years | 25 years |
| Performance Warranty | 25 years | 30 years |
| Degradation (Year 1) | 1% | 1% |
| Annual Degradation | 0.4% | 0.54% |
| Country | United States | Vietnam |
5-Dimension Head-to-Head Analysis
1. Efficiency & Power Density
Winner: Silfab SIL-370-BK 370WThe Silfab SIL-370-BK 370W achieves 20.4% efficiency versus 20.21% — a 0.2 percentage point advantage. On a typical 30-panel residential roof, this translates to approximately 2.1 kW more total system capacity, or 10 kWh more annual production in an average US location.
2. Hot Climate Performance
Winner: TieBoth panels share a temperature coefficient of -0.35%/°C — identical heat tolerance.
3. Durability & Warranty
Winner: Silfab SIL-370-BK 370WSilfab SIL-370-BK 370W degrades more slowly at 0.4% per year versus 0.54%. After 25 years, expect 89.4% vs 86.0% of original output for Silfab SIL-370-BK 370W and Aptos Solar DNA-144-MF26 440W Silver respectively.
4. Power Output
Winner: Aptos Solar DNA-144-MF26 440W SilverThe Aptos Solar DNA-144-MF26 440W Silver delivers 440W versus 370W per panel — 70W more. For an 8 kW system, you need 19 panels with the higher-wattage option versus 22 panels, saving 3 panels and the associated racking and labor costs.
5. Cell Technology
Winner: TieBoth panels use PERC Mono cell technology. No technology advantage for either product.
Silfab SIL-370-BK 370W
The SIL-370-BK is Silfab's entry-level US-made all-black panel delivering 370W for budget-conscious domestic installations.
Pros
- + Made in USA
- + All-black design
- + 25-year warranty
- + ARRA compliant
Cons
- - Lower wattage
- - Basic PERC technology
- - Less competitive efficiency
Aptos Solar DNA-144-MF26 440W Silver
Aptos Solar DNA-144-MF26 Silver is a 440W monofacial panel with silver frame, optimized for commercial and utility-scale installations where aesthetics are less critical.
Pros
- + Silver frame option at lower cost
- + 440W output with 144 half-cut cells
- + 30-year performance warranty
- + Ideal for utility and ground-mount applications
Cons
- - Silver frame less aesthetic for residential rooftops
- - 20.21% efficiency is moderate
- - No bifacial capability
Choose Silfab SIL-370-BK 370W If...
- ✓ Your roof space is limited and you need maximum power per panel
- ✓ You want maximum output retention over the system's 25-30 year lifespan
- ✓ Government or institutional projects requiring ARRA/Buy America compliance.
Choose Aptos Solar DNA-144-MF26 440W Silver If...
- ✓ You want fewer panels to reach your target system size, reducing racking and labor costs
- ✓ Utility-scale and commercial ground-mount installations where silver frame aesthetics are acceptable and cost savings matter.
Our Recommendation
Both the Silfab SIL-370-BK 370W and Aptos Solar DNA-144-MF26 440W Silver are excellent solar panel options, and the margin between them is narrow. The Aptos Solar DNA-144-MF26 440W Silver wins 1 of 5 comparison dimensions by a slim margin. Your decision may come down to local pricing, installer availability, and which specific performance metrics matter most for your project. Either product is a solid investment.
Frequently Asked Questions
Which is better, Silfab SIL-370-BK 370W or Aptos Solar DNA-144-MF26 440W Silver?
The Aptos Solar DNA-144-MF26 440W Silver wins this comparison by a narrow margin. It delivers more power (440W vs 370W). For most residential installations, the Aptos Solar DNA-144-MF26 440W Silver is the stronger choice.
Which panel is more efficient, Silfab SIL-370-BK 370W or Aptos Solar DNA-144-MF26 440W Silver?
The Silfab SIL-370-BK 370W at 20.4% 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 70W per panel under standard test conditions.
Which has a better warranty, Silfab SIL-370-BK 370W or Aptos Solar DNA-144-MF26 440W Silver?
The Silfab SIL-370-BK 370W comes with a 25-year product warranty and 25-year performance guarantee. The Aptos Solar DNA-144-MF26 440W Silver offers 25-year product and 30-year performance warranties. Both offer identical warranty terms.
Which panel performs better in hot weather?
The Silfab SIL-370-BK 370W has a temperature coefficient of -0.35%/°C and the Aptos Solar DNA-144-MF26 440W Silver is -0.35%/°C. Both handle heat equally. A lower (less negative) temperature coefficient is better.
How many Silfab SIL-370-BK 370W vs Aptos Solar DNA-144-MF26 440W Silver panels do I need for an 8 kW system?
For an 8 kW system: you need 22 Silfab SIL-370-BK 370W panels (370W each) or 19 Aptos Solar DNA-144-MF26 440W Silver panels (440W each). The Aptos Solar DNA-144-MF26 440W Silver requires fewer panels, saving on racking hardware and installation labor.
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Last updated: February 2026