Silfab SIL-370-BK 370W vs Aptos Solar DNA-120-MF10 460W
The Aptos Solar DNA-120-MF10 460W wins this comparison by a clear margin. It leads in efficiency (21.26% vs 20.4%) and matches or exceeds on warranty (30 vs 25 years). For most residential installations, the Aptos Solar DNA-120-MF10 460W is the stronger choice.
Key Differences
- • Silfab SIL-370-BK 370W is rated at 370W while Aptos Solar DNA-120-MF10 460W is rated at 460W, a 90W difference.
- • Aptos Solar DNA-120-MF10 460W achieves 21.26% efficiency vs 20.4% for the other, a 0.9 percentage point gap.
- • Aptos Solar DNA-120-MF10 460W comes with a 30-year product warranty vs 25 years for the other.
Specifications Breakdown
Module Efficiency
The Aptos Solar DNA-120-MF10 460W achieves 21.26% module efficiency compared to Silfab SIL-370-BK 370W's 20.4%, meaning Aptos Solar DNA-120-MF10 460W converts 0.9 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-120-MF10 460W produces 212.6 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-120-MF10 460W delivers 460W per panel versus 370W for the Silfab SIL-370-BK 370W, a 90W difference per module. To build an 8 kW residential system, you would need 22 Silfab SIL-370-BK 370W panels or 18 Aptos Solar DNA-120-MF10 460W panels. Choosing the higher-wattage option saves 4 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-120-MF10 460W offers 30-year product and 30-year performance coverage. The Aptos Solar DNA-120-MF10 460W provides 5 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 Silfab SIL-370-BK 370W; 1% first year then 0.54%/year for Aptos Solar DNA-120-MF10 460W), 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-120-MF10 460W. 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-120-MF10 460W measures 1908×1134×35mm at 24 kg. 1.95 m² of panel area for the Silfab SIL-370-BK 370W versus 2.16 m² for the Aptos Solar DNA-120-MF10 460W. The Silfab SIL-370-BK 370W is 4.5 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 90 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-120-MF10 460W |
|---|---|---|
| Power | 370W | 460W |
| Efficiency | 20.4% | 21.26% |
| Power Density | 17.6 W/sq ft | 19.8 W/sq ft |
| Cell Type | PERC Mono | PERC Mono |
| Bifacial | No | No |
| Weight | 19.5 kg | 24 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 | 30 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: Aptos Solar DNA-120-MF10 460WThe Aptos Solar DNA-120-MF10 460W achieves 21.26% efficiency versus 20.4% — a 0.9 percentage point advantage. On a typical 30-panel residential roof, this translates to approximately 2.7 kW more total system capacity, or 13 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: Aptos Solar DNA-120-MF10 460WAptos Solar DNA-120-MF10 460W leads with a 30-year product warranty versus 25 years. Silfab 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-120-MF10 460W respectively.
4. Power Output
Winner: Aptos Solar DNA-120-MF10 460WThe Aptos Solar DNA-120-MF10 460W delivers 460W versus 370W per panel — 90W more. For an 8 kW system, you need 18 panels with the higher-wattage option versus 22 panels, saving 4 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-120-MF10 460W
Aptos Solar DNA-120-MF10 delivers 460W with 120 half-cut PERC cells and 10 ultra-thin busbars for high energy harvest in commercial and large residential systems.
Pros
- + 460W output in a versatile 120-cell format
- + 30-year product and performance warranty
- + 10 ultra-thin busbars reduce resistive loss
- + Competitive price per watt
Cons
- - Larger format may not fit all residential rooftops
- - PERC technology vs newer TOPCon options
- - No bifacial energy gain
Choose Silfab SIL-370-BK 370W If...
- ✓ 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-120-MF10 460W 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 30+ years
- ✓ Commercial installations and large residential systems seeking high wattage with proven PERC technology at competitive pricing.
Our Recommendation
We recommend the Aptos Solar DNA-120-MF10 460W for most buyers in this comparison. It wins 3 of 5 key dimensions and offers a clear advantage in the metrics that matter most for a solar panel purchase. The Silfab SIL-370-BK 370W remains a good product, but the Aptos Solar DNA-120-MF10 460W delivers better overall value for the majority of installations.
Frequently Asked Questions
Which is better, Silfab SIL-370-BK 370W or Aptos Solar DNA-120-MF10 460W?
The Aptos Solar DNA-120-MF10 460W wins this comparison by a clear margin. It leads in efficiency (21.26% vs 20.4%) and matches or exceeds on warranty (30 vs 25 years). For most residential installations, the Aptos Solar DNA-120-MF10 460W is the stronger choice.
Which panel is more efficient, Silfab SIL-370-BK 370W or Aptos Solar DNA-120-MF10 460W?
The Aptos Solar DNA-120-MF10 460W at 21.26% module efficiency. Higher efficiency means more watts per square foot of roof space, which is critical for space-constrained installations. The difference of 0.9 percentage points translates to approximately 90W per panel under standard test conditions.
Which has a better warranty, Silfab SIL-370-BK 370W or Aptos Solar DNA-120-MF10 460W?
The Silfab SIL-370-BK 370W comes with a 25-year product warranty and 25-year performance guarantee. The Aptos Solar DNA-120-MF10 460W offers 30-year product and 30-year performance warranties. Aptos Solar DNA-120-MF10 460W provides 5 additional years of product coverage.
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-120-MF10 460W 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-120-MF10 460W 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 18 Aptos Solar DNA-120-MF10 460W panels (460W each). The Aptos Solar DNA-120-MF10 460W requires fewer panels, saving on racking hardware and installation labor.
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Last updated: February 2026