Seraphim S4 Series 430W vs Aptos Solar DNA-120-MF26 370W
The Aptos Solar DNA-120-MF26 370W wins this comparison by a clear margin. It offers better long-term durability with 25-year warranty. For most residential installations, the Aptos Solar DNA-120-MF26 370W is the stronger choice.
Key Differences
- • Seraphim S4 Series 430W is rated at 430W while Aptos Solar DNA-120-MF26 370W is rated at 370W, a 60W difference.
- • Seraphim S4 Series 430W achieves 21.2% efficiency vs 20.28% for the other, a 0.9 percentage point gap.
- • Aptos Solar DNA-120-MF26 370W comes with a 25-year product warranty vs 12 years for the other.
- • Seraphim S4 Series 430W has a superior temperature coefficient of -0.34%/°C vs -0.36%/°C, retaining more power in hot climates.
Specifications Breakdown
Module Efficiency
The Seraphim S4 Series 430W achieves 21.2% module efficiency compared to Aptos Solar DNA-120-MF26 370W's 20.28%, meaning Seraphim S4 Series 430W converts 0.9 percentage points more sunlight into electricity per square meter. In practical terms, the Seraphim S4 Series 430W produces 220.2 watts per square meter of panel area while the Aptos Solar DNA-120-MF26 370W produces 200.4 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 Seraphim S4 Series 430W delivers 430W per panel versus 370W for the Aptos Solar DNA-120-MF26 370W, a 60W difference per module. To build an 8 kW residential system, you would need 19 Seraphim S4 Series 430W panels or 22 Aptos Solar DNA-120-MF26 370W 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
The Seraphim S4 Series 430W has a temperature coefficient of -0.34%/°C versus -0.36%/°C for the Aptos Solar DNA-120-MF26 370W. On a hot summer day when cell temperature reaches 65°C (40°C above the 25°C STC baseline), the Seraphim S4 Series 430W retains 93.2% of its rated power while the other retains 92.8%. 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 Seraphim S4 Series 430W is backed by a 12-year product warranty and 25-year performance guarantee, while the Aptos Solar DNA-120-MF26 370W offers 25-year product and 30-year performance coverage. The Aptos Solar DNA-120-MF26 370W provides 13 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 Seraphim S4 Series 430W; 1% first year then 0.54%/year for Aptos Solar DNA-120-MF26 370W), after 25 years the Seraphim S4 Series 430W should retain approximately 86.5% of original output versus 86.0% for the Aptos Solar DNA-120-MF26 370W. The end-of-life output levels are closely matched.
Physical Dimensions & Weight
The Seraphim S4 Series 430W measures 1722×1134×30mm and weighs 21 kg, while the Aptos Solar DNA-120-MF26 370W measures 1762×1048×35mm at 20.5 kg. 1.95 m² of panel area for the Seraphim S4 Series 430W versus 1.85 m² for the Aptos Solar DNA-120-MF26 370W. Their weights are closely matched, so neither panel imposes a significantly different structural load on the mounting system. The more compact Aptos Solar DNA-120-MF26 370W may be easier to fit on irregularly shaped or space-limited rooftops.
Specification Comparison
| Specification | Seraphim S4 Series 430W | Aptos Solar DNA-120-MF26 370W |
|---|---|---|
| Power | 430W | 370W |
| Efficiency | 21.2% | 20.28% |
| Power Density | 20.5 W/sq ft | 18.6 W/sq ft |
| Cell Type | PERC Mono | PERC Mono |
| Bifacial | No | No |
| Weight | 21 kg | 20.5 kg |
| Temp Coefficient | -0.34%/°C | -0.36%/°C |
| Snow Load | 5400 Pa | 5400 Pa |
| Wind Load | 2400 Pa | 4000 Pa |
| Product Warranty | 12 years | 25 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: Seraphim S4 Series 430WThe Seraphim S4 Series 430W achieves 21.2% efficiency versus 20.28% — a 0.9 percentage point advantage. On a typical 30-panel residential roof, this translates to approximately 1.8 kW more total system capacity, or 9 kWh more annual production in an average US location.
2. Hot Climate Performance
Winner: Seraphim S4 Series 430WThe Seraphim S4 Series 430W has a better temperature coefficient of -0.34%/°C versus -0.36%/°C. On a 45°C summer day (20°C above STC), the winner retains 93.2% of rated power versus 92.8%. The difference is modest but accumulates over 25 years of summer production.
3. Durability & Warranty
Winner: Aptos Solar DNA-120-MF26 370WAptos Solar DNA-120-MF26 370W leads with a 25-year product warranty versus 12 years. Seraphim S4 Series 430W degrades more slowly at 0.5% per year versus 0.54%. After 25 years, expect 86.5% vs 86.0% of original output for Seraphim S4 Series 430W and Aptos Solar DNA-120-MF26 370W respectively.
4. Power Output
Winner: Seraphim S4 Series 430WThe Seraphim S4 Series 430W delivers 430W versus 370W per panel — 60W 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.
Seraphim S4 Series 430W
The Seraphim S4 Series delivers 430W using proven PERC technology at a competitive price point for residential installations.
Pros
- + Competitive pricing
- + Proven PERC technology
- + Compact design
- + Good value
Cons
- - Standard PERC efficiency
- - Shorter warranty period
- - Limited US presence
Aptos Solar DNA-120-MF26 370W
Aptos Solar DNA-120-MF26 is a 370W all-black residential panel with DNA technology, designed for aesthetic rooftop installations with strong value pricing.
Pros
- + All-black design for aesthetic residential rooftops
- + Lightweight at 20.5 kg
- + Budget-friendly price per watt
- + 30-year performance warranty
Cons
- - Lower 370W output requires more panels
- - 20.28% efficiency below premium tier
- - No bifacial option in this model
Choose Seraphim S4 Series 430W 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
- ✓ 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
- ✓ Budget residential installations seeking competitive PERC pricing.
Choose Aptos Solar DNA-120-MF26 370W If...
- ✓ Long-term warranty protection is a top priority and you plan to stay in your home for 25+ years
- ✓ Budget-conscious homeowners who want an attractive all-black panel with reliable performance and long warranty coverage.
Our Recommendation
We recommend the Aptos Solar DNA-120-MF26 370W for most buyers in this comparison. It wins 1 of 5 key dimensions and offers a clear advantage in the metrics that matter most for a solar panel purchase. The Seraphim S4 Series 430W remains a good product, but the Aptos Solar DNA-120-MF26 370W delivers better overall value for the majority of installations.
Frequently Asked Questions
Which is better, Seraphim S4 Series 430W or Aptos Solar DNA-120-MF26 370W?
The Aptos Solar DNA-120-MF26 370W wins this comparison by a clear margin. It offers better long-term durability with 25-year warranty. For most residential installations, the Aptos Solar DNA-120-MF26 370W is the stronger choice.
Which panel is more efficient, Seraphim S4 Series 430W or Aptos Solar DNA-120-MF26 370W?
The Seraphim S4 Series 430W at 21.2% 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 60W per panel under standard test conditions.
Which has a better warranty, Seraphim S4 Series 430W or Aptos Solar DNA-120-MF26 370W?
The Seraphim S4 Series 430W comes with a 12-year product warranty and 25-year performance guarantee. The Aptos Solar DNA-120-MF26 370W offers 25-year product and 30-year performance warranties. Aptos Solar DNA-120-MF26 370W provides 13 additional years of product coverage.
Which panel performs better in hot weather?
The Seraphim S4 Series 430W has a temperature coefficient of -0.34%/°C and the Aptos Solar DNA-120-MF26 370W is -0.36%/°C. Seraphim S4 Series 430W retains more power in heat — important in states like Arizona, Texas, and Florida. A lower (less negative) temperature coefficient is better.
How many Seraphim S4 Series 430W vs Aptos Solar DNA-120-MF26 370W panels do I need for an 8 kW system?
For an 8 kW system: you need 19 Seraphim S4 Series 430W panels (430W each) or 22 Aptos Solar DNA-120-MF26 370W panels (370W each). The Seraphim S4 Series 430W requires fewer panels, saving on racking hardware and installation labor.
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Last updated: February 2026