Panasonic EverVolt H 410W vs Panasonic EVPV400H
This is a close comparison between similar models in the same product line.
The Panasonic EverVolt H 410W wins this comparison by a narrow margin. It leads in efficiency (21.6% vs 21.2%) and matches or exceeds on warranty (25 vs 25 years). For most residential installations, the Panasonic EverVolt H 410W is the stronger choice.
Key Differences
- • Panasonic EverVolt H 410W is rated at 410W while Panasonic EVPV400H is rated at 400W, a 10W difference.
- • Panasonic EverVolt H 410W achieves 21.6% efficiency vs 21.2% for the other, a 0.4 percentage point gap.
- • Both carry matching 25-year product warranties.
Specifications Breakdown
Module Efficiency
The Panasonic EverVolt H 410W achieves 21.6% module efficiency compared to Panasonic EVPV400H's 21.2%, meaning Panasonic EverVolt H 410W converts 0.4 percentage points more sunlight into electricity per square meter. In practical terms, the Panasonic EverVolt H 410W produces 210.0 watts per square meter of panel area while the Panasonic EVPV400H produces 204.8 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 Panasonic EverVolt H 410W delivers 410W per panel versus 400W for the Panasonic EVPV400H, a 10W difference per module. To build an 8 kW residential system, you would need 20 Panasonic EverVolt H 410W panels or 20 Panasonic EVPV400H 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
Both panels share an identical temperature coefficient of -0.26%/°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 94.8% of rated power. Neither panel has a thermal performance advantage, which makes this specification a non-factor in the comparison.
Warranty Coverage
The Panasonic EverVolt H 410W is backed by a 25-year product warranty and 25-year performance guarantee, while the Panasonic EVPV400H offers 25-year product and 25-year performance coverage. Both offer identical product warranty duration. Based on their published degradation rates (0.5% first year then 0.35%/year for Panasonic EverVolt H 410W; 0.5% first year then 0.35%/year for Panasonic EVPV400H), after 25 years the Panasonic EverVolt H 410W should retain approximately 91.1% of original output versus 91.1% for the Panasonic EVPV400H. The end-of-life output levels are closely matched.
Physical Dimensions & Weight
The Panasonic EverVolt H 410W measures 1722×1134×30mm and weighs 21.5 kg, while the Panasonic EVPV400H measures 1722×1134×30mm at 21 kg. 1.95 m² of panel area for the Panasonic EverVolt H 410W versus 1.95 m² for the Panasonic EVPV400H. 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 EverVolt H 410W | Panasonic EVPV400H |
|---|---|---|
| Power | 410W | 400W |
| Efficiency | 21.6% | 21.2% |
| Power Density | 19.5 W/sq ft | 19.0 W/sq ft |
| Cell Type | HJT (Heterojunction) | HJT (Heterojunction) |
| Bifacial | Yes | Yes |
| Weight | 21.5 kg | 21 kg |
| Temp Coefficient | -0.26%/°C | -0.26%/°C |
| Snow Load | 5400 Pa | 5400 Pa |
| Wind Load | 2400 Pa | 2400 Pa |
| Product Warranty | 25 years | 25 years |
| Performance Warranty | 25 years | 25 years |
| Degradation (Year 1) | 0.5% | 0.5% |
| Annual Degradation | 0.35% | 0.35% |
| Country | Japan | Japan |
5-Dimension Head-to-Head Analysis
1. Efficiency & Power Density
Winner: Panasonic EverVolt H 410WThe Panasonic EverVolt H 410W achieves 21.6% efficiency versus 21.2% — a 0.4 percentage point advantage. On a typical 30-panel residential roof, this translates to approximately 0.3 kW more total system capacity, or 2 kWh more annual production in an average US location.
2. Hot Climate Performance
Winner: TieBoth panels share a temperature coefficient of -0.26%/°C — identical heat tolerance.
3. Durability & Warranty
Winner: TieBoth panels offer identical 25-year product warranties and 0.35% annual degradation. Neither has a durability advantage.
4. Power Output
Winner: Panasonic EverVolt H 410WThe Panasonic EverVolt H 410W delivers 410W versus 400W per panel — 10W 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: TieBoth panels use HJT (Heterojunction) cell technology. No technology advantage for either product.
Panasonic EverVolt H 410W
DISCONTINUED: Panasonic exited solar manufacturing in 2023. The EverVolt H delivered 410W HJT performance in a compact residential format backed by Panasonic's 25-year complete warranty.
Pros
- + 25-year product warranty
- + HJT technology
- + Excellent temperature performance
- + Compact design
Cons
- - DISCONTINUED - no longer manufactured
- - No new units available
- - No ongoing product support
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
Choose Panasonic EverVolt H 410W 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 prefer newer cell technology with a longer performance improvement runway
- ✓ No longer available for new installations.
Choose Panasonic EVPV400H If...
- ✓ You prefer newer cell technology with a longer performance improvement runway
- ✓ No longer available for new installations.
Our Recommendation
Both the Panasonic EverVolt H 410W and Panasonic EVPV400H are excellent solar panel options, and the margin between them is narrow. The Panasonic EverVolt H 410W 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 EverVolt H 410W or Panasonic EVPV400H?
The Panasonic EverVolt H 410W wins this comparison by a narrow margin. It leads in efficiency (21.6% vs 21.2%) and matches or exceeds on warranty (25 vs 25 years). For most residential installations, the Panasonic EverVolt H 410W is the stronger choice.
Which panel is more efficient, Panasonic EverVolt H 410W or Panasonic EVPV400H?
The Panasonic EverVolt H 410W at 21.6% module efficiency. Higher efficiency means more watts per square foot of roof space, which is critical for space-constrained installations. The difference of 0.4 percentage points translates to approximately 10W per panel under standard test conditions.
Which has a better warranty, Panasonic EverVolt H 410W or Panasonic EVPV400H?
The Panasonic EverVolt H 410W comes with a 25-year product warranty and 25-year performance guarantee. The Panasonic EVPV400H offers 25-year product and 25-year performance warranties. Both offer identical warranty terms.
Which panel performs better in hot weather?
The Panasonic EverVolt H 410W has a temperature coefficient of -0.26%/°C and the Panasonic EVPV400H is -0.26%/°C. Both handle heat equally. A lower (less negative) temperature coefficient is better.
How many Panasonic EverVolt H 410W vs Panasonic EVPV400H panels do I need for an 8 kW system?
For an 8 kW system: you need 20 Panasonic EverVolt H 410W panels (410W each) or 20 Panasonic EVPV400H panels (400W each). The Panasonic EverVolt H 410W requires fewer panels, saving on racking hardware and installation labor.
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Last updated: February 2026