Renogy 450W Bifacial Mono Solar Panel vs CertainTeed Solstice Solar Panel 365W
The Renogy 450W Bifacial Mono Solar Panel wins this comparison by a decisive margin. It leads in efficiency (22.8% vs 19.9%) and matches or exceeds on warranty (12 vs 10 years). For most residential installations, the Renogy 450W Bifacial Mono Solar Panel is the stronger choice.
Key Differences
- • Renogy 450W Bifacial Mono Solar Panel is rated at 450W while CertainTeed Solstice Solar Panel 365W is rated at 365W, a 85W difference.
- • Renogy 450W Bifacial Mono Solar Panel achieves 22.8% efficiency vs 19.9% for the other, a 2.9 percentage point gap.
- • Renogy 450W Bifacial Mono Solar Panel comes with a 12-year product warranty vs 10 years for the other.
- • Renogy 450W Bifacial Mono Solar Panel has a superior temperature coefficient of -0.29%/°C vs -0.36%/°C, retaining more power in hot climates.
- • Renogy 450W Bifacial Mono Solar Panel uses N-Type Monocrystalline cells while CertainTeed Solstice Solar Panel 365W uses Monocrystalline PERC cells, representing different technology generations.
Specifications Breakdown
Module Efficiency
The Renogy 450W Bifacial Mono Solar Panel achieves 22.8% module efficiency compared to CertainTeed Solstice Solar Panel 365W's 19.9%, meaning Renogy 450W Bifacial Mono Solar Panel converts 2.9 percentage points more sunlight into electricity per square meter. In practical terms, the Renogy 450W Bifacial Mono Solar Panel produces 233.1 watts per square meter of panel area while the CertainTeed Solstice Solar Panel 365W produces 199.2 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 365W for the CertainTeed Solstice Solar Panel 365W, a 85W difference per module. To build an 8 kW residential system, you would need 18 Renogy 450W Bifacial Mono Solar Panel panels or 22 CertainTeed Solstice Solar Panel 365W panels. Choosing the higher-wattage option saves 4 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 Renogy 450W Bifacial Mono Solar Panel has a temperature coefficient of -0.29%/°C versus -0.36%/°C for the CertainTeed Solstice Solar Panel 365W. 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 92.8%. 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 Renogy 450W Bifacial Mono Solar Panel is backed by a 12-year product warranty and 25-year performance guarantee, while the CertainTeed Solstice Solar Panel 365W offers 10-year product and 25-year performance coverage. The Renogy 450W Bifacial Mono Solar Panel provides 2 additional years of defect protection, covering manufacturing issues, material failures, and premature performance loss. Based on their published degradation rates (1% first year then 0.4%/year for Renogy 450W Bifacial Mono Solar Panel; 2% first year then 0.55%/year for CertainTeed Solstice Solar Panel 365W), after 25 years the Renogy 450W Bifacial Mono Solar Panel should retain approximately 89.4% of original output versus 84.8% for the CertainTeed Solstice Solar Panel 365W. This 4.6 percentage point gap in end-of-life output meaningfully impacts lifetime energy economics.
Physical Dimensions & Weight
The Renogy 450W Bifacial Mono Solar Panel measures 1801×1072×30mm and weighs 24.2 kg, while the CertainTeed Solstice Solar Panel 365W measures 1755×1044×40mm at 21.6 kg. 1.93 m² of panel area for the Renogy 450W Bifacial Mono Solar Panel versus 1.83 m² for the CertainTeed Solstice Solar Panel 365W. The CertainTeed Solstice Solar Panel 365W is 2.6 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 52 kg. Similar footprints mean both panels fit comparably on standard residential rooftop configurations.
Specification Comparison
| Specification | Renogy 450W Bifacial Mono Solar Panel | CertainTeed Solstice Solar Panel 365W |
|---|---|---|
| Power | 450W | 365W |
| Efficiency | 22.8% | 19.9% |
| Power Density | 21.7 W/sq ft | 18.5 W/sq ft |
| Cell Type | N-Type Monocrystalline | Monocrystalline PERC |
| Bifacial | Yes | No |
| Weight | 24.2 kg | 21.6 kg |
| Temp Coefficient | -0.29%/°C | -0.36%/°C |
| Snow Load | 5400 Pa | 5400 Pa |
| Wind Load | 2400 Pa | 2400 Pa |
| Product Warranty | 12 years | 10 years |
| Performance Warranty | 25 years | 25 years |
| Degradation (Year 1) | 1% | 2% |
| Annual Degradation | 0.4% | 0.55% |
| Country | China | United States |
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 19.9% — a 2.9 percentage point advantage. On a typical 30-panel residential roof, this translates to approximately 2.5 kW more total system capacity, or 12 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 -0.36%/°C. On a 45°C summer day (20°C above STC), the winner retains 94.2% of rated power versus 92.8%. 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 leads with a 12-year product warranty versus 10 years. Renogy 450W Bifacial Mono Solar Panel degrades more slowly at 0.4% per year versus 0.55%. After 25 years, expect 89.4% vs 84.8% of original output for Renogy 450W Bifacial Mono Solar Panel and CertainTeed Solstice Solar Panel 365W respectively.
4. Power Output
Winner: Renogy 450W Bifacial Mono Solar PanelThe Renogy 450W Bifacial Mono Solar Panel delivers 450W versus 365W per panel — 85W more. For an 8 kW system, you need 18 panels with the higher-wattage option versus 22 panels, saving 4 panels and the associated racking and labor costs.
5. Cell Technology
Winner: Renogy 450W Bifacial Mono Solar PanelThe Renogy 450W Bifacial Mono Solar Panel uses N-Type Monocrystalline: N-Type Monocrystalline. The CertainTeed Solstice Solar Panel 365W uses Monocrystalline PERC: PERC (Passivated Emitter Rear Cell) is the current mainstream technology, offering good efficiency at the lowest manufacturing cost. N-Type Monocrystalline represents a newer generation technology with a longer performance runway as manufacturing matures.
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
CertainTeed Solstice Solar Panel 365W
The CertainTeed Solstice Solar Panel 365W is a conventional residential solar panel from CertainTeed (Saint-Gobain), using monocrystalline PERC half-cut cells. Designed to pair with CertainTeed roofing products for a coordinated roof-and-solar installation through certified roofing contractors.
Pros
- + Made in the USA by Saint-Gobain subsidiary
- + 10-year product warranty — strong for US-manufactured panel
- + Designed for seamless pairing with CertainTeed roofing
- + Half-cut PERC cells for partial shade resilience
- + Available through established roofing contractor network
Cons
- - 19.9% efficiency below current N-Type leaders
- - 365W output lower than modern 400W+ panels
- - Heavier at 21.6 kg than comparable wattage panels
- - Higher cost per watt than budget alternatives
- - Limited distribution outside CertainTeed roofing dealers
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
- ✓ Long-term warranty protection is a top priority and you plan to stay in your home for 12+ 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
Choose CertainTeed Solstice Solar Panel 365W If...
- ✓ Homeowners doing a combined roof replacement and solar installation through CertainTeed-certified contractors.
Our Recommendation
The Renogy 450W Bifacial Mono Solar Panel is the decisive winner in this solar panel comparison, outperforming the CertainTeed Solstice Solar Panel 365W in 5 of 5 dimensions. Unless you have a specific requirement that the CertainTeed Solstice Solar Panel 365W uniquely addresses, the Renogy 450W Bifacial Mono Solar Panel is the stronger choice for virtually every installation scenario.
Frequently Asked Questions
Which is better, Renogy 450W Bifacial Mono Solar Panel or CertainTeed Solstice Solar Panel 365W?
The Renogy 450W Bifacial Mono Solar Panel wins this comparison by a decisive margin. It leads in efficiency (22.8% vs 19.9%) and matches or exceeds on warranty (12 vs 10 years). For most residential installations, the Renogy 450W Bifacial Mono Solar Panel is the stronger choice.
Which panel is more efficient, Renogy 450W Bifacial Mono Solar Panel or CertainTeed Solstice Solar Panel 365W?
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 2.9 percentage points translates to approximately 85W per panel under standard test conditions.
Which has a better warranty, Renogy 450W Bifacial Mono Solar Panel or CertainTeed Solstice Solar Panel 365W?
The Renogy 450W Bifacial Mono Solar Panel comes with a 12-year product warranty and 25-year performance guarantee. The CertainTeed Solstice Solar Panel 365W offers 10-year product and 25-year performance warranties. Renogy 450W Bifacial Mono Solar Panel provides 2 additional years of product coverage.
Which panel performs better in hot weather?
The Renogy 450W Bifacial Mono Solar Panel has a temperature coefficient of -0.29%/°C and the CertainTeed Solstice Solar Panel 365W is -0.36%/°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 Renogy 450W Bifacial Mono Solar Panel vs CertainTeed Solstice Solar Panel 365W panels do I need for an 8 kW system?
For an 8 kW system: you need 18 Renogy 450W Bifacial Mono Solar Panel panels (450W each) or 22 CertainTeed Solstice Solar Panel 365W panels (365W 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