Panasonic EVPV400H vs Risen Energy Hyper-ion HJT 700W
The Risen Energy Hyper-ion HJT 700W wins this comparison by a narrow margin. It leads in efficiency (23% vs 21.2%). For most residential installations, the Risen Energy Hyper-ion HJT 700W is the stronger choice.
Key Differences
- • Panasonic EVPV400H is rated at 400W while Risen Energy Hyper-ion HJT 700W is rated at 700W, a 300W difference.
- • Risen Energy Hyper-ion HJT 700W achieves 23% efficiency vs 21.2% for the other, a 1.8 percentage point gap.
- • Panasonic EVPV400H comes with a 25-year product warranty vs 15 years for the other.
- • Risen Energy Hyper-ion HJT 700W has a superior temperature coefficient of -0.25%/°C vs -0.26%/°C, retaining more power in hot climates.
Specifications Breakdown
Module Efficiency
The Risen Energy Hyper-ion HJT 700W achieves 23% module efficiency compared to Panasonic EVPV400H's 21.2%, meaning Risen Energy Hyper-ion HJT 700W converts 1.8 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 Risen Energy Hyper-ion HJT 700W produces 225.3 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 Risen Energy Hyper-ion HJT 700W delivers 700W per panel versus 400W for the Panasonic EVPV400H, a 300W difference per module. To build an 8 kW residential system, you would need 20 Panasonic EVPV400H panels or 12 Risen Energy Hyper-ion HJT 700W panels. Choosing the higher-wattage option saves 8 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 Risen Energy Hyper-ion HJT 700W has a temperature coefficient of -0.25%/°C versus -0.26%/°C for the Panasonic EVPV400H. On a hot summer day when cell temperature reaches 65°C (40°C above the 25°C STC baseline), the Risen Energy Hyper-ion HJT 700W retains 95.0% of its rated power while the other retains 94.8%. 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 Panasonic EVPV400H is backed by a 25-year product warranty and 25-year performance guarantee, while the Risen Energy Hyper-ion HJT 700W offers 15-year product and 30-year performance coverage. The Panasonic EVPV400H provides 10 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; 0.5% first year then 0.35%/year for Risen Energy Hyper-ion HJT 700W), after 25 years the Panasonic EVPV400H should retain approximately 91.1% of original output versus 91.1% for the Risen Energy Hyper-ion HJT 700W. The end-of-life output levels are closely matched.
Physical Dimensions & Weight
The Panasonic EVPV400H measures 1722×1134×30mm and weighs 21 kg, while the Risen Energy Hyper-ion HJT 700W measures 2384×1303×35mm at 35.5 kg. 1.95 m² of panel area for the Panasonic EVPV400H versus 3.11 m² for the Risen Energy Hyper-ion HJT 700W. The Panasonic EVPV400H is 14.5 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 290 kg. The more compact Panasonic EVPV400H may be easier to fit on irregularly shaped or space-limited rooftops.
Specification Comparison
| Specification | Panasonic EVPV400H | Risen Energy Hyper-ion HJT 700W |
|---|---|---|
| Power | 400W | 700W |
| Efficiency | 21.2% | 23% |
| Power Density | 19.0 W/sq ft | 20.9 W/sq ft |
| Cell Type | HJT (Heterojunction) | HJT (Heterojunction) |
| Bifacial | Yes | Yes |
| Weight | 21 kg | 35.5 kg |
| Temp Coefficient | -0.26%/°C | -0.25%/°C |
| Snow Load | 5400 Pa | 5400 Pa |
| Wind Load | 2400 Pa | 2400 Pa |
| Product Warranty | 25 years | 15 years |
| Performance Warranty | 25 years | 30 years |
| Degradation (Year 1) | 0.5% | 0.5% |
| Annual Degradation | 0.35% | 0.35% |
| Country | Japan | China |
5-Dimension Head-to-Head Analysis
1. Efficiency & Power Density
Winner: Risen Energy Hyper-ion HJT 700WThe Risen Energy Hyper-ion HJT 700W achieves 23% efficiency versus 21.2% — a 1.8 percentage point advantage. On a typical 30-panel residential roof, this translates to approximately 9.0 kW more total system capacity, or 41 kWh more annual production in an average US location.
2. Hot Climate Performance
Winner: Risen Energy Hyper-ion HJT 700WThe Risen Energy Hyper-ion HJT 700W has a better temperature coefficient of -0.25%/°C versus -0.26%/°C. On a 45°C summer day (20°C above STC), the winner retains 95.0% of rated power versus 94.8%. The difference is modest but accumulates over 25 years of summer production.
3. Durability & Warranty
Winner: Panasonic EVPV400HPanasonic EVPV400H leads with a 25-year product warranty versus 15 years. After 25 years, expect 91.1% vs 91.1% of original output for Panasonic EVPV400H and Risen Energy Hyper-ion HJT 700W respectively.
4. Power Output
Winner: Risen Energy Hyper-ion HJT 700WThe Risen Energy Hyper-ion HJT 700W delivers 700W versus 400W per panel — 300W more. For an 8 kW system, you need 12 panels with the higher-wattage option versus 20 panels, saving 8 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 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
Risen Energy Hyper-ion HJT 700W
The Hyper-ion HJT 700W is one of the highest-wattage residential/commercial panels available, using advanced HJT cells for exceptional efficiency.
Pros
- + Ultra-high 700W output
- + 23.0% HJT efficiency
- + Best temperature coefficient
- + Future-proof technology
Cons
- - Extremely large and heavy
- - Premium pricing
- - Limited availability
Choose Panasonic EVPV400H If...
- ✓ Long-term warranty protection is a top priority and you plan to stay in your home for 25+ years
- ✓ You prefer newer cell technology with a longer performance improvement runway
- ✓ No longer available for new installations.
Choose Risen Energy Hyper-ion HJT 700W 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 prefer newer cell technology with a longer performance improvement runway
- ✓ Ground-mount and commercial systems seeking maximum wattage per panel.
Our Recommendation
Both the Panasonic EVPV400H and Risen Energy Hyper-ion HJT 700W are excellent solar panel options, and the margin between them is narrow. The Risen Energy Hyper-ion HJT 700W wins 3 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 Risen Energy Hyper-ion HJT 700W?
The Risen Energy Hyper-ion HJT 700W wins this comparison by a narrow margin. It leads in efficiency (23% vs 21.2%). For most residential installations, the Risen Energy Hyper-ion HJT 700W is the stronger choice.
Which panel is more efficient, Panasonic EVPV400H or Risen Energy Hyper-ion HJT 700W?
The Risen Energy Hyper-ion HJT 700W at 23% module efficiency. Higher efficiency means more watts per square foot of roof space, which is critical for space-constrained installations. The difference of 1.8 percentage points translates to approximately 300W per panel under standard test conditions.
Which has a better warranty, Panasonic EVPV400H or Risen Energy Hyper-ion HJT 700W?
The Panasonic EVPV400H comes with a 25-year product warranty and 25-year performance guarantee. The Risen Energy Hyper-ion HJT 700W offers 15-year product and 30-year performance warranties. Panasonic EVPV400H provides 10 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 Risen Energy Hyper-ion HJT 700W is -0.25%/°C. Risen Energy Hyper-ion HJT 700W 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 Risen Energy Hyper-ion HJT 700W panels do I need for an 8 kW system?
For an 8 kW system: you need 20 Panasonic EVPV400H panels (400W each) or 12 Risen Energy Hyper-ion HJT 700W panels (700W each). The Risen Energy Hyper-ion HJT 700W requires fewer panels, saving on racking hardware and installation labor.
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Last updated: February 2026