Panasonic EverVolt H 410W vs Panasonic EverVolt 410
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 21.5%) 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
- • Both panels are rated at 410W, so the comparison comes down to efficiency, warranty, and technology.
- • Panasonic EverVolt H 410W achieves 21.6% efficiency vs 21.5% for the other, a 0.1 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 EverVolt 410's 21.5%, meaning Panasonic EverVolt H 410W converts 0.1 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 EverVolt 410 produces 210.0 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
Both panels are rated at 410W under standard test conditions (STC), requiring 20 panels each to build an 8 kW system. With identical wattage ratings, the power output dimension is a draw and does not favor either panel. The real differentiators become efficiency density, temperature behavior, and long-term degradation rates which determine actual field performance beyond the nameplate rating.
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 EverVolt 410 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 EverVolt 410), after 25 years the Panasonic EverVolt H 410W should retain approximately 91.1% of original output versus 91.1% for the Panasonic EverVolt 410. 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 EverVolt 410 measures 1722×1134×30mm at 21.5 kg. 1.95 m² of panel area for the Panasonic EverVolt H 410W versus 1.95 m² for the Panasonic EverVolt 410. 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 EverVolt 410 |
|---|---|---|
| Power | 410W | 410W |
| Efficiency | 21.6% | 21.5% |
| Power Density | 19.5 W/sq ft | 19.5 W/sq ft |
| Cell Type | HJT (Heterojunction) | HJT (Heterojunction) |
| Bifacial | Yes | Yes |
| Weight | 21.5 kg | 21.5 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 21.5% — a 0.1 percentage point advantage. On a typical 30-panel residential roof, this translates to approximately 0.0 kW more total system capacity, or 0 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: TieBoth panels deliver 410W — identical power output per panel. System cost per watt will be the deciding factor.
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 EverVolt 410
DISCONTINUED: Panasonic exited solar manufacturing in 2023. The EverVolt 410 offered Panasonic's HJT technology at a slightly more accessible price point while maintaining premium quality.
Pros
- + Panasonic brand quality
- + HJT cell technology
- + Good temperature performance
- + 25-year warranty
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 prefer newer cell technology with a longer performance improvement runway
- ✓ No longer available for new installations.
Choose Panasonic EverVolt 410 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 EverVolt 410 are excellent solar panel options, and the margin between them is narrow. The Panasonic EverVolt H 410W 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, Panasonic EverVolt H 410W or Panasonic EverVolt 410?
The Panasonic EverVolt H 410W wins this comparison by a narrow margin. It leads in efficiency (21.6% vs 21.5%) 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 EverVolt 410?
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 0.1 percentage points translates to approximately 0W per panel under standard test conditions.
Which has a better warranty, Panasonic EverVolt H 410W or Panasonic EverVolt 410?
The Panasonic EverVolt H 410W comes with a 25-year product warranty and 25-year performance guarantee. The Panasonic EverVolt 410 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 EverVolt 410 is -0.26%/°C. Both handle heat equally. A lower (less negative) temperature coefficient is better.
How many Panasonic EverVolt H 410W vs Panasonic EverVolt 410 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 EverVolt 410 panels (410W each). Both require the same number of panels.
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Last updated: February 2026