Seraphim S4 Series 430W vs Renogy 450W Bifacial Mono Solar Panel
The Renogy 450W Bifacial Mono Solar Panel wins this comparison by a clear margin. It leads in efficiency (22.8% vs 21.2%) and matches or exceeds on warranty (12 vs 12 years). For most residential installations, the Renogy 450W Bifacial Mono Solar Panel is the stronger choice.
Key Differences
- • Seraphim S4 Series 430W is rated at 430W while Renogy 450W Bifacial Mono Solar Panel is rated at 450W, a 20W difference.
- • Renogy 450W Bifacial Mono Solar Panel achieves 22.8% efficiency vs 21.2% for the other, a 1.6 percentage point gap.
- • Both carry matching 12-year product warranties.
- • Renogy 450W Bifacial Mono Solar Panel has a superior temperature coefficient of -0.29%/°C vs -0.34%/°C, retaining more power in hot climates.
- • Seraphim S4 Series 430W uses PERC Mono cells while Renogy 450W Bifacial Mono Solar Panel uses N-Type Monocrystalline cells, representing different technology generations.
Specifications Breakdown
Module Efficiency
The Renogy 450W Bifacial Mono Solar Panel achieves 22.8% module efficiency compared to Seraphim S4 Series 430W's 21.2%, meaning Renogy 450W Bifacial Mono Solar Panel converts 1.6 percentage points more sunlight into electricity per square meter. In practical terms, the Seraphim S4 Series 430W produces 220.2 watts per square meter of panel area while the Renogy 450W Bifacial Mono Solar Panel produces 233.1 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 Renogy 450W Bifacial Mono Solar Panel delivers 450W per panel versus 430W for the Seraphim S4 Series 430W, a 20W difference per module. To build an 8 kW residential system, you would need 19 Seraphim S4 Series 430W panels or 18 Renogy 450W Bifacial Mono Solar Panel 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 Renogy 450W Bifacial Mono Solar Panel has a temperature coefficient of -0.29%/°C versus -0.34%/°C for the Seraphim S4 Series 430W. On a hot summer day when cell temperature reaches 65°C (40°C above the 25°C STC baseline), the Renogy 450W Bifacial Mono Solar Panel retains 94.2% 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 Seraphim S4 Series 430W is backed by a 12-year product warranty and 25-year performance guarantee, while the Renogy 450W Bifacial Mono Solar Panel offers 12-year product and 25-year performance coverage. Both offer identical product warranty duration. Based on their published degradation rates (1.5% first year then 0.5%/year for Seraphim S4 Series 430W; 1% first year then 0.4%/year for Renogy 450W Bifacial Mono Solar Panel), after 25 years the Seraphim S4 Series 430W should retain approximately 86.5% of original output versus 89.4% for the Renogy 450W Bifacial Mono Solar Panel. This 2.9 percentage point gap in end-of-life output meaningfully impacts lifetime energy economics.
Physical Dimensions & Weight
The Seraphim S4 Series 430W measures 1722×1134×30mm and weighs 21 kg, while the Renogy 450W Bifacial Mono Solar Panel measures 1801×1072×30mm at 24.2 kg. 1.95 m² of panel area for the Seraphim S4 Series 430W versus 1.93 m² for the Renogy 450W Bifacial Mono Solar Panel. The Seraphim S4 Series 430W is 3.2 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 64 kg. Similar footprints mean both panels fit comparably on standard residential rooftop configurations.
Specification Comparison
| Specification | Seraphim S4 Series 430W | Renogy 450W Bifacial Mono Solar Panel |
|---|---|---|
| Power | 430W | 450W |
| Efficiency | 21.2% | 22.8% |
| Power Density | 20.5 W/sq ft | 21.7 W/sq ft |
| Cell Type | PERC Mono | N-Type Monocrystalline |
| Bifacial | No | Yes |
| Weight | 21 kg | 24.2 kg |
| Temp Coefficient | -0.34%/°C | -0.29%/°C |
| Snow Load | 5400 Pa | 5400 Pa |
| Wind Load | 2400 Pa | 2400 Pa |
| Product Warranty | 12 years | 12 years |
| Performance Warranty | 25 years | 25 years |
| Degradation (Year 1) | 1.5% | 1% |
| Annual Degradation | 0.5% | 0.4% |
| Country | China | China |
5-Dimension Head-to-Head Analysis
1. Efficiency & Power Density
Winner: Renogy 450W Bifacial Mono Solar PanelThe Renogy 450W Bifacial Mono Solar Panel achieves 22.8% efficiency versus 21.2% — a 1.6 percentage point advantage. On a typical 30-panel residential roof, this translates to approximately 0.6 kW more total system capacity, or 3 kWh more annual production in an average US location.
2. Hot Climate Performance
Winner: Renogy 450W Bifacial Mono Solar PanelThe Renogy 450W Bifacial Mono Solar Panel has a better temperature coefficient of -0.29%/°C versus -0.34%/°C. On a 45°C summer day (20°C above STC), the winner retains 94.2% of rated power versus 93.2%. This is a meaningful difference in hot states like Arizona, Texas, and Florida.
3. Durability & Warranty
Winner: Renogy 450W Bifacial Mono Solar PanelRenogy 450W Bifacial Mono Solar Panel degrades more slowly at 0.4% per year versus 0.5%. After 25 years, expect 86.5% vs 89.4% of original output for Seraphim S4 Series 430W and Renogy 450W Bifacial Mono Solar Panel respectively.
4. Power Output
Winner: Renogy 450W Bifacial Mono Solar PanelThe Renogy 450W Bifacial Mono Solar Panel delivers 450W versus 430W per panel — 20W more. For an 8 kW system, you need 18 panels with the higher-wattage option versus 19 panels, saving 1 panels and the associated racking and labor costs.
5. Cell Technology
Winner: Renogy 450W Bifacial Mono Solar PanelThe Seraphim S4 Series 430W uses PERC Mono: PERC (Passivated Emitter Rear Cell) is the current mainstream technology, offering good efficiency at the lowest manufacturing cost. The Renogy 450W Bifacial Mono Solar Panel uses N-Type Monocrystalline: N-Type Monocrystalline. N-Type Monocrystalline represents a newer generation technology with a longer performance runway as manufacturing matures.
Seraphim S4 Series 430W
The Seraphim S4 Series delivers 430W using proven PERC technology at a competitive price point for residential installations.
Pros
- + Competitive pricing
- + Proven PERC technology
- + Compact design
- + Good value
Cons
- - Standard PERC efficiency
- - Shorter warranty period
- - Limited US presence
Renogy 450W Bifacial Mono Solar Panel
The Renogy 450W Bifacial Mono Solar Panel is Renogy's flagship residential/commercial panel, combining N-Type monocrystalline cells with bifacial technology for up to 25% additional energy gain from reflected light.
Pros
- + Bifacial design with up to 25% energy gain
- + 22.8% efficiency with N-Type cells
- + 12-year product warranty — Renogy's longest
- + Good temperature coefficient at -0.29%/°C
- + UL 1703 certified for residential and commercial
Cons
- - 24.2 kg heavier than most residential panels
- - Bifacial gain requires proper mounting height and ground albedo
- - Higher upfront cost than monofacial alternatives
- - Large 1.93 m² footprint
Choose Seraphim S4 Series 430W If...
- ✓ Budget residential installations seeking competitive PERC pricing.
Choose Renogy 450W Bifacial Mono Solar Panel 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 want maximum output retention over the system's 25-30 year lifespan
- ✓ Residential and commercial installations seeking maximum energy harvest with bifacial gain, especially ground-mount systems.
Our Recommendation
We recommend the Renogy 450W Bifacial Mono Solar Panel for most buyers in this comparison. It wins 5 of 5 key dimensions and offers a clear advantage in the metrics that matter most for a solar panel purchase. The Seraphim S4 Series 430W remains a good product, but the Renogy 450W Bifacial Mono Solar Panel delivers better overall value for the majority of installations.
Frequently Asked Questions
Which is better, Seraphim S4 Series 430W or Renogy 450W Bifacial Mono Solar Panel?
The Renogy 450W Bifacial Mono Solar Panel wins this comparison by a clear margin. It leads in efficiency (22.8% vs 21.2%) and matches or exceeds on warranty (12 vs 12 years). For most residential installations, the Renogy 450W Bifacial Mono Solar Panel is the stronger choice.
Which panel is more efficient, Seraphim S4 Series 430W or Renogy 450W Bifacial Mono Solar Panel?
The Renogy 450W Bifacial Mono Solar Panel at 22.8% module efficiency. Higher efficiency means more watts per square foot of roof space, which is critical for space-constrained installations. The difference of 1.6 percentage points translates to approximately 20W per panel under standard test conditions.
Which has a better warranty, Seraphim S4 Series 430W or Renogy 450W Bifacial Mono Solar Panel?
The Seraphim S4 Series 430W comes with a 12-year product warranty and 25-year performance guarantee. The Renogy 450W Bifacial Mono Solar Panel offers 12-year product and 25-year performance warranties. Both offer identical warranty terms.
Which panel performs better in hot weather?
The Seraphim S4 Series 430W has a temperature coefficient of -0.34%/°C and the Renogy 450W Bifacial Mono Solar Panel is -0.29%/°C. Renogy 450W Bifacial Mono Solar Panel retains more power in heat — important in states like Arizona, Texas, and Florida. A lower (less negative) temperature coefficient is better.
How many Seraphim S4 Series 430W vs Renogy 450W Bifacial Mono Solar Panel panels do I need for an 8 kW system?
For an 8 kW system: you need 19 Seraphim S4 Series 430W panels (430W each) or 18 Renogy 450W Bifacial Mono Solar Panel panels (450W each). The Renogy 450W Bifacial Mono Solar Panel requires fewer panels, saving on racking hardware and installation labor.
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Last updated: February 2026