Panasonic EVPV400H vs Aptos Solar DNA-108-MF10 415W
The Panasonic EVPV400H wins this comparison by a narrow margin. It offers better long-term durability with 25-year warranty. For most residential installations, the Panasonic EVPV400H is the stronger choice.
Key Differences
- • Panasonic EVPV400H is rated at 400W while Aptos Solar DNA-108-MF10 415W is rated at 415W, a 15W difference.
- • Aptos Solar DNA-108-MF10 415W achieves 21.25% efficiency vs 21.2% for the other, a 0.1 percentage point gap.
- • Aptos Solar DNA-108-MF10 415W comes with a 30-year product warranty vs 25 years for the other.
- • Panasonic EVPV400H has a superior temperature coefficient of -0.26%/°C vs -0.32%/°C, retaining more power in hot climates.
- • Panasonic EVPV400H uses HJT (Heterojunction) cells while Aptos Solar DNA-108-MF10 415W uses PERC Mono cells, representing different technology generations.
Specifications Breakdown
Module Efficiency
The Aptos Solar DNA-108-MF10 415W achieves 21.25% module efficiency compared to Panasonic EVPV400H's 21.2%, meaning Aptos Solar DNA-108-MF10 415W converts 0.1 percentage points more sunlight into electricity per square meter. In practical terms, the Panasonic EVPV400H produces 204.8 watts per square meter of panel area while the Aptos Solar DNA-108-MF10 415W produces 212.5 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-108-MF10 415W delivers 415W per panel versus 400W for the Panasonic EVPV400H, a 15W difference per module. To build an 8 kW residential system, you would need 20 Panasonic EVPV400H panels or 20 Aptos Solar DNA-108-MF10 415W panels. Despite the per-panel wattage difference, both require the same number of panels for this system size due to rounding. Higher wattage per panel is particularly valuable for commercial-scale installations where panel count directly impacts balance-of-system costs.
Temperature Coefficient
The Panasonic EVPV400H has a temperature coefficient of -0.26%/°C versus -0.32%/°C for the Aptos Solar DNA-108-MF10 415W. On a hot summer day when cell temperature reaches 65°C (40°C above the 25°C STC baseline), the Panasonic EVPV400H retains 94.8% of its rated power while the other retains 93.6%. 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 Panasonic EVPV400H is backed by a 25-year product warranty and 25-year performance guarantee, while the Aptos Solar DNA-108-MF10 415W offers 30-year product and 30-year performance coverage. The Aptos Solar DNA-108-MF10 415W provides 5 additional years of defect protection, covering manufacturing issues, material failures, and premature performance loss. Based on their published degradation rates (0.5% first year then 0.35%/year for Panasonic EVPV400H; 1% first year then 0.54%/year for Aptos Solar DNA-108-MF10 415W), after 25 years the Panasonic EVPV400H should retain approximately 91.1% of original output versus 86.0% for the Aptos Solar DNA-108-MF10 415W. This 5.1 percentage point gap in end-of-life output meaningfully impacts lifetime energy economics.
Physical Dimensions & Weight
The Panasonic EVPV400H measures 1722×1134×30mm and weighs 21 kg, while the Aptos Solar DNA-108-MF10 415W measures 1722×1134×35mm at 21.5 kg. 1.95 m² of panel area for the Panasonic EVPV400H versus 1.95 m² for the Aptos Solar DNA-108-MF10 415W. 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 | Panasonic EVPV400H | Aptos Solar DNA-108-MF10 415W |
|---|---|---|
| Power | 400W | 415W |
| Efficiency | 21.2% | 21.25% |
| Power Density | 19.0 W/sq ft | 19.7 W/sq ft |
| Cell Type | HJT (Heterojunction) | PERC Mono |
| Bifacial | Yes | No |
| Weight | 21 kg | 21.5 kg |
| Temp Coefficient | -0.26%/°C | -0.32%/°C |
| Snow Load | 5400 Pa | 5400 Pa |
| Wind Load | 2400 Pa | 4000 Pa |
| Product Warranty | 25 years | 30 years |
| Performance Warranty | 25 years | 30 years |
| Degradation (Year 1) | 0.5% | 1% |
| Annual Degradation | 0.35% | 0.54% |
| Country | Japan | Vietnam |
5-Dimension Head-to-Head Analysis
1. Efficiency & Power Density
Winner: Aptos Solar DNA-108-MF10 415WThe Aptos Solar DNA-108-MF10 415W achieves 21.25% efficiency versus 21.2% — a 0.1 percentage point advantage. On a typical 30-panel residential roof, this translates to approximately 0.5 kW more total system capacity, or 3 kWh more annual production in an average US location.
2. Hot Climate Performance
Winner: Panasonic EVPV400HThe Panasonic EVPV400H has a better temperature coefficient of -0.26%/°C versus -0.32%/°C. On a 45°C summer day (20°C above STC), the winner retains 94.8% of rated power versus 93.6%. This is a meaningful difference in hot states like Arizona, Texas, and Florida.
3. Durability & Warranty
Winner: Aptos Solar DNA-108-MF10 415WAptos Solar DNA-108-MF10 415W leads with a 30-year product warranty versus 25 years. Panasonic EVPV400H degrades more slowly at 0.35% per year versus 0.54%. After 25 years, expect 91.1% vs 86.0% of original output for Panasonic EVPV400H and Aptos Solar DNA-108-MF10 415W respectively.
4. Power Output
Winner: Aptos Solar DNA-108-MF10 415WThe Aptos Solar DNA-108-MF10 415W delivers 415W versus 400W per panel — 15W more. For an 8 kW system, you need 20 panels with the higher-wattage option versus 20 panels, saving 0 panels and the associated racking and labor costs.
5. Cell Technology
Winner: Panasonic EVPV400HThe Panasonic EVPV400H uses HJT (Heterojunction): HJT (Heterojunction) combines crystalline silicon with amorphous silicon layers, delivering the best temperature coefficient and bifacial gains, but at higher manufacturing cost. The Aptos Solar DNA-108-MF10 415W uses PERC Mono: PERC (Passivated Emitter Rear Cell) is the current mainstream technology, offering good efficiency at the lowest manufacturing cost. HJT (Heterojunction) represents a newer generation technology with a longer performance runway as manufacturing matures.
Panasonic EVPV400H
DISCONTINUED: Panasonic exited solar manufacturing in 2023. The EVPV400H was Panasonic's standard HJT residential panel, delivering 400W with the brand's signature quality and longevity.
Pros
- + Panasonic reliability
- + HJT advantages
- + Solid 25-year warranty
- + Good all-round performer
Cons
- - DISCONTINUED - no longer manufactured
- - No new units available
- - No ongoing product support
Aptos Solar DNA-108-MF10 415W
Aptos Solar DNA-108-MF10 is a 415W residential panel using patented DNA PERC technology with 108 half-cut cells and 10 ultra-thin busbars for high efficiency in a compact all-black design.
Pros
- + Compact 108-cell format ideal for residential rooftops
- + 30-year product and performance warranty
- + All-black aesthetic with high 21.25% efficiency
- + Lightweight at 21.5 kg for easy installation
Cons
- - PERC technology vs newer TOPCon alternatives
- - Lower wattage limits large system designs
- - No bifacial energy gain
Choose Panasonic EVPV400H 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
- ✓ You prefer newer cell technology with a longer performance improvement runway
- ✓ No longer available for new installations.
Choose Aptos Solar DNA-108-MF10 415W 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
- ✓ Homeowners seeking a compact, aesthetically pleasing panel with strong warranty coverage for residential rooftop installations.
Our Recommendation
Both the Panasonic EVPV400H and Aptos Solar DNA-108-MF10 415W are excellent solar panel options, and the margin between them is narrow. The Panasonic EVPV400H wins 2 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, Panasonic EVPV400H or Aptos Solar DNA-108-MF10 415W?
The Panasonic EVPV400H wins this comparison by a narrow margin. It offers better long-term durability with 25-year warranty. For most residential installations, the Panasonic EVPV400H is the stronger choice.
Which panel is more efficient, Panasonic EVPV400H or Aptos Solar DNA-108-MF10 415W?
The Aptos Solar DNA-108-MF10 415W at 21.25% module efficiency. Higher efficiency means more watts per square foot of roof space, which is critical for space-constrained installations. The difference of 0.1 percentage points translates to approximately 15W per panel under standard test conditions.
Which has a better warranty, Panasonic EVPV400H or Aptos Solar DNA-108-MF10 415W?
The Panasonic EVPV400H comes with a 25-year product warranty and 25-year performance guarantee. The Aptos Solar DNA-108-MF10 415W offers 30-year product and 30-year performance warranties. Aptos Solar DNA-108-MF10 415W provides 5 additional years of product coverage.
Which panel performs better in hot weather?
The Panasonic EVPV400H has a temperature coefficient of -0.26%/°C and the Aptos Solar DNA-108-MF10 415W is -0.32%/°C. Panasonic EVPV400H retains more power in heat — important in states like Arizona, Texas, and Florida. A lower (less negative) temperature coefficient is better.
How many Panasonic EVPV400H vs Aptos Solar DNA-108-MF10 415W panels do I need for an 8 kW system?
For an 8 kW system: you need 20 Panasonic EVPV400H panels (400W each) or 20 Aptos Solar DNA-108-MF10 415W panels (415W each). The Aptos Solar DNA-108-MF10 415W requires fewer panels, saving on racking hardware and installation labor.
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Last updated: February 2026