LONGi Hi-MO 6 Explorer 430W vs Panasonic EVPV400H
The Panasonic EVPV400H wins this comparison by a decisive margin. It offers better long-term durability with 25-year warranty. For most residential installations, the Panasonic EVPV400H is the stronger choice.
Key Differences
- • LONGi Hi-MO 6 Explorer 430W is rated at 430W while Panasonic EVPV400H is rated at 400W, a 30W difference.
- • LONGi Hi-MO 6 Explorer 430W achieves 21.6% efficiency vs 21.2% for the other, a 0.4 percentage point gap.
- • Panasonic EVPV400H comes with a 25-year product warranty vs 12 years for the other.
- • Panasonic EVPV400H has a superior temperature coefficient of -0.26%/°C vs -0.34%/°C, retaining more power in hot climates.
- • LONGi Hi-MO 6 Explorer 430W uses PERC Mono cells while Panasonic EVPV400H uses HJT (Heterojunction) cells, representing different technology generations.
Specifications Breakdown
Module Efficiency
The LONGi Hi-MO 6 Explorer 430W achieves 21.6% module efficiency compared to Panasonic EVPV400H's 21.2%, meaning LONGi Hi-MO 6 Explorer 430W converts 0.4 percentage points more sunlight into electricity per square meter. In practical terms, the LONGi Hi-MO 6 Explorer 430W produces 220.2 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 LONGi Hi-MO 6 Explorer 430W delivers 430W per panel versus 400W for the Panasonic EVPV400H, a 30W difference per module. To build an 8 kW residential system, you would need 19 LONGi Hi-MO 6 Explorer 430W panels or 20 Panasonic EVPV400H panels. Choosing the higher-wattage option saves 1 panel, 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 Panasonic EVPV400H has a temperature coefficient of -0.26%/°C versus -0.34%/°C for the LONGi Hi-MO 6 Explorer 430W. 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 93.2%. 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 LONGi Hi-MO 6 Explorer 430W is backed by a 12-year product warranty and 25-year performance guarantee, while the Panasonic EVPV400H offers 25-year product and 25-year performance coverage. The Panasonic EVPV400H 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 LONGi Hi-MO 6 Explorer 430W; 0.5% first year then 0.35%/year for Panasonic EVPV400H), after 25 years the LONGi Hi-MO 6 Explorer 430W should retain approximately 86.5% of original output versus 91.1% for the Panasonic EVPV400H. This 4.6 percentage point gap in end-of-life output meaningfully impacts lifetime energy economics.
Physical Dimensions & Weight
The LONGi Hi-MO 6 Explorer 430W measures 1722×1134×30mm and weighs 21 kg, while the Panasonic EVPV400H measures 1722×1134×30mm at 21 kg. 1.95 m² of panel area for the LONGi Hi-MO 6 Explorer 430W 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 | LONGi Hi-MO 6 Explorer 430W | Panasonic EVPV400H |
|---|---|---|
| Power | 430W | 400W |
| Efficiency | 21.6% | 21.2% |
| Power Density | 20.5 W/sq ft | 19.0 W/sq ft |
| Cell Type | PERC Mono | HJT (Heterojunction) |
| Bifacial | No | Yes |
| Weight | 21 kg | 21 kg |
| Temp Coefficient | -0.34%/°C | -0.26%/°C |
| Snow Load | 5400 Pa | 5400 Pa |
| Wind Load | 2400 Pa | 2400 Pa |
| Product Warranty | 12 years | 25 years |
| Performance Warranty | 25 years | 25 years |
| Degradation (Year 1) | 1.5% | 0.5% |
| Annual Degradation | 0.5% | 0.35% |
| Country | China | Japan |
5-Dimension Head-to-Head Analysis
1. Efficiency & Power Density
Winner: LONGi Hi-MO 6 Explorer 430WThe LONGi Hi-MO 6 Explorer 430W achieves 21.6% efficiency versus 21.2% — a 0.4 percentage point advantage. On a typical 30-panel residential roof, this translates to approximately 0.9 kW more total system capacity, or 5 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 -0.34%/°C. On a 45°C summer day (20°C above STC), the winner retains 94.8% of rated power versus 93.2%. This is a meaningful difference in hot states like Arizona, Texas, and Florida.
3. Durability & Warranty
Winner: Panasonic EVPV400HPanasonic EVPV400H leads with a 25-year product warranty versus 12 years. Panasonic EVPV400H degrades more slowly at 0.35% per year versus 0.5%. After 25 years, expect 86.5% vs 91.1% of original output for LONGi Hi-MO 6 Explorer 430W and Panasonic EVPV400H respectively.
4. Power Output
Winner: LONGi Hi-MO 6 Explorer 430WThe LONGi Hi-MO 6 Explorer 430W delivers 430W versus 400W per panel — 30W more. For an 8 kW system, you need 19 panels with the higher-wattage option versus 20 panels, saving 1 panels and the associated racking and labor costs.
5. Cell Technology
Winner: Panasonic EVPV400HThe LONGi Hi-MO 6 Explorer 430W uses PERC Mono: PERC (Passivated Emitter Rear Cell) is the current mainstream technology, offering good efficiency at the lowest manufacturing cost. The 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. HJT (Heterojunction) represents a newer generation technology with a longer performance runway as manufacturing matures.
LONGi Hi-MO 6 Explorer 430W
The Hi-MO 6 Explorer is an affordable PERC panel delivering 430W output, designed for cost-effective residential solar installations.
Pros
- + Affordable price point
- + Lightweight design
- + Easy to install
- + Reliable PERC technology
Cons
- - Lower efficiency than N-type models
- - Higher temperature coefficient
- - Shorter warranty
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 LONGi Hi-MO 6 Explorer 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
- ✓ Budget residential installations where cost is the priority.
Choose Panasonic EVPV400H If...
- ✓ Long-term warranty protection is a top priority and you plan to stay in your home for 25+ years
- ✓ 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.
Our Recommendation
The Panasonic EVPV400H is the decisive winner in this solar panel comparison, outperforming the LONGi Hi-MO 6 Explorer 430W in 3 of 5 dimensions. Unless you have a specific requirement that the LONGi Hi-MO 6 Explorer 430W uniquely addresses, the Panasonic EVPV400H is the stronger choice for virtually every installation scenario.
Frequently Asked Questions
Which is better, LONGi Hi-MO 6 Explorer 430W or Panasonic EVPV400H?
The Panasonic EVPV400H wins this comparison by a decisive 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, LONGi Hi-MO 6 Explorer 430W or Panasonic EVPV400H?
The LONGi Hi-MO 6 Explorer 430W 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 30W per panel under standard test conditions.
Which has a better warranty, LONGi Hi-MO 6 Explorer 430W or Panasonic EVPV400H?
The LONGi Hi-MO 6 Explorer 430W comes with a 12-year product warranty and 25-year performance guarantee. The Panasonic EVPV400H offers 25-year product and 25-year performance warranties. Panasonic EVPV400H provides 13 additional years of product coverage.
Which panel performs better in hot weather?
The LONGi Hi-MO 6 Explorer 430W has a temperature coefficient of -0.34%/°C and the Panasonic EVPV400H is -0.26%/°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 LONGi Hi-MO 6 Explorer 430W vs Panasonic EVPV400H panels do I need for an 8 kW system?
For an 8 kW system: you need 19 LONGi Hi-MO 6 Explorer 430W panels (430W each) or 20 Panasonic EVPV400H panels (400W each). The LONGi Hi-MO 6 Explorer 430W requires fewer panels, saving on racking hardware and installation labor.
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Last updated: February 2026